كل ما يخص نظم المعلومات الجغرافية (GIS) وأي شخص مهتم في مجال علم نظم المعلومات الجغرافية وخاصةً برامج ArcGIS يستفيد من هذا الموقع، هناك الكثير من البرنامج التي يتم شرح طريقة تنزيلها بالإضافة الى مقالات كثيرة في نظم المعلومات الجغرافية، تستطيع من خلالها التعلم وتبادل العلم والمعرفة في مجال هذا العلم ، يمكن لأي شخص متابعة هذا الموقع ومتابعة أي مقال جديد لحظة بلحظة، هناك دورات مجانية وبمستويات متعددة لتعلم على برامج ArcGIS وأي برامج تهتم في GIS.
Calculates, for each
cell, the least accumulative cost distance from or to the least-cost source,
while accounting for surface distance along with horizontal and vertical cost
factors.
تحسب ، لكل خلية ، أقل
مسافة تكلفة تراكمية من أو إلى المصدر الأقل تكلفة ، مع احتساب مسافة السطح جنبًا
إلى جنب مع عوامل التكلفة الأفقية والعمودية.
1.Input raster or feature source data إدخال البيانات النقطية أو ميزة مصدر البيانات
The input source
locations.
This is a raster or
feature dataset that identifies the cells or locations from or to which the
least accumulated cost distance for every output cell location is calculated.
For rasters, the input
type can be integer or floating point.
مواقع مصدر الإدخال.
هذه مجموعة بيانات نقطية أو ميزة تحدد الخلايا أو
المواقع منها أو التي يتم فيها حساب أقل مسافة تكلفة متراكمة لكل موقع خلية إخراج.
بالنسبة إلى البيانات النقطية ، يمكن أن يكون نوع
الإدخال عددًا صحيحًا أو نقطة عائمة.
Output
distance raster
The output path distance raster.
The output path distance raster identifies, for each cell, the least
accumulative cost distance, over a cost surface to the identified source
locations, while accounting for surface distance as well as horizontal and
vertical surface factors.
A source can be a cell, a set of cells, or one or more feature locations.
The output raster is of floating-point type.
Input cost
raster (optional)
A raster defining the impedance or cost to move planimetrically through
each cell.
The value at each cell location represents the cost-per-unit distance for
moving through the cell. Each cell location value is multiplied by the cell
resolution while also compensating for diagonal movement to obtain the total
cost of passing through the cell.
The values of the cost raster can be integer or floating point, but they
cannot be negative or zero (you cannot have a negative or zero cost).
Input
surface raster (optional)
A raster defining the elevation values at each cell location.
The values are used to calculate the actual surface distance covered when
passing between cells.
Maximum
distance (optional)
The threshold that the accumulative cost values cannot exceed.
If an accumulative cost distance value exceeds this value, the output
value for the cell location will be NoData. The maximum distance is the extent
for which the accumulative cost distances are calculated.
The default distance is to the edge of the output raster.
Output
backlink raster (optional)
The output cost backlink raster.
The backlink raster contains values 0 through 8, which define the
direction or identify the next neighboring cell (the succeeding cell) along the
least accumulative cost path from a cell to reach its least-cost source, while
accounting for surface distance as well as horizontal and vertical surface
factors.
If the path is to pass into the right neighbor, the cell will be assigned
the value 1, 2 for the lower right diagonal cell, and continue clockwise. The
value 0 is reserved for source cells.
Input
horizontal raster (optional)
A raster defining the horizontal direction at each cell.
The values on the raster must be integers ranging from 0 to 360, with 0
degrees being north, or toward the top of the screen, and increasing clockwise.
Flat areas should be given a value of -1. The values at each location will be
used in conjunction with the Horizontal factor to determine the horizontal cost
incurred when moving from a cell to its neighbors.
Horizontal
factor (optional)
Specifies the relationship between the horizontal cost factor and the
horizontal relative moving angle (HRMA).
There are several factors with modifiers from which to select that
identify a defined horizontal factor graph. Additionally, a table can be used
to create a custom graph. The graphs are used to identify the horizontal factor
used in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: HF stands for horizontal
factor, which defines the horizontal difficulty encountered when moving from
one cell to the next; and HRMA stands for horizontal relative moving angle,
which identifies the angle between the horizontal direction from a cell and the
moving direction.
The Horizontal factor options are as follows:
·Binary—If the HRMA is less than the cut angle, the HF is set to the value
associated with the zero factor; otherwise, it is infinity.
·Forward—Only forward movement is allowed. The HRMA must be greater than or
equal to 0 and less than 90 degrees (0 <= HRMA < 90). If the HRMA is
greater than 0 and less than 45 degrees, the HF for the cell is set to the
value associated with the zero factor. If the HRMA is greater than or equal to
45 degrees, the side value modifier value is used. The HF for any HRMA equal to
or greater than 90 degrees is set to infinity.
·Linear—The HF is a linear function of the HRMA.
·Inverse Linear—The HF is an inverse linear function of the HRMA.
·Table—A table file will be used to define the horizontal factor graph used
to determine the HFs.
Modifiers to the horizontal factors are the following:
·Zero factor—The horizontal factor to be used when the HRMA is zero. This
factor positions the y-intercept for any of the horizontal factor functions.
·Cut angle—The HRMA angle beyond which the HF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear horizontal factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Side value—The HF when the HRMA is greater than or equal to 45 degrees and
less than 90 degrees when the Forward horizontal factor keyword is specified.
·Table name—The name of the table defining the HF.
Input
vertical raster (optional)
A raster defining the z-values for each cell location.
The values are used for calculating the slope used to identify the
vertical factor incurred when moving from one cell to another.
Vertical
factor (optional)
Specifies the relationship between the vertical cost factor and the
vertical relative moving angle (VRMA).
There are several factors with modifiers from which to select that
identify a defined vertical factor graph. Additionally, a table can be used to
create a custom graph. The graphs are used to identify the vertical factor used
in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: VF stands for vertical
factor, which defines the vertical difficulty encountered in moving from one
cell to the next; and VRMA stands for vertical relative moving angle, which
identifies the slope angle between the FROM or processing cell and the TO cell.
The Vertical factor options are as follows:
·Binary—If the VRMA is greater than the low-cut angle and less than the
high-cut angle, the VF is set to the value associated with the zero factor;
otherwise, it is infinity.
·Linear—The VF is a linear function of the VRMA.
·Symmetric Linear—The VF is a linear function of the VRMA in either the
negative or positive side of the VRMA, respectively, and the two linear
functions are symmetrical with respect to the VF (y) axis.
·Inverse Linear—The VF is an inverse linear function of the VRMA.
·Symmetric Inverse Linear—The VF is an inverse linear function of the VRMA
in either the negative or positive side of the VRMA, respectively, and the two
linear functions are symmetrical with respect to the VF (y) axis.
·Cos—The VF is the cosine-based function of the VRMA.
·Sec—The VF is the secant-based function of the VRMA.
·Cos-Sec—The VF is the cosine-based function of the VRMA when the VRMA is
negative and is the secant-based function of the VRMA when the VRMA is
nonnegative.
·Sec-Cos—The VF is the secant-based function of the VRMA when the VRMA is
negative and is the cosine-based function of the VRMA when the VRMA is
nonnegative.
·Table—A table file will be used to define the vertical-factor graph used
to determine the VFs.
Modifiers to the vertical keywords are the following:
·Zero factor—The vertical factor used when the VRMA is zero. This factor
positions the y-intercept of the specified function. By definition, the zero
factor is not applicable to any of the trigonometric vertical functions (COS,
SEC, COS-SEC, or SEC-COS). The y-intercept is defined by these functions.
·Low Cut angle—The VRMA angle below which the VF will be set to infinity.
·High Cut angle—The VRMA angle above which the VF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear vertical-factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Table name—The name of the table defining the VF.
Multiplier
to apply to costs (optional)
The multiplier to apply to the cost values.
This allows for control of the mode of travel or the magnitude at a
source. The greater the multiplier, the greater the cost to move through each
cell.
The values must be greater than zero. The default is 1.
Start cost
(optional)
The starting cost from which to begin the cost calculations.
Allows for the specification of the fixed cost associated with a source.
Instead of starting at a cost of zero, the cost algorithm will begin with the
value set by Start cost.
The values must be zero or greater. The default is 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost
values.
The values must be zero or greater. The default is 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel direction
(optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to
options, which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
2.Output distance raster مسافة
الإخراج النقطية
The output path distance
raster.
The output path distance
raster identifies, for each cell, the least accumulative cost distance, over a
cost surface to the identified source locations, while accounting for surface
distance as well as horizontal and vertical surface factors.
A source can be a cell,
a set of cells, or one or more feature locations.
The output raster is of
floating-point type.
مسافة مسار الإخراج النقطية.
تحدد المسافة النقطية لمسار الإخراج ، لكل خلية ،
أقل مسافة تكلفة تراكمية ، على سطح التكلفة إلى مواقع المصدر المحددة ، مع احتساب
مسافة السطح بالإضافة إلى عوامل السطح الأفقية والرأسية.
يمكن أن يكون المصدر خلية أو مجموعة من الخلايا أو
موقع معلم واحد أو أكثر.
النقطية الناتجة من نوع النقطة العائمة.
Input cost
raster (optional)
A raster defining the impedance or cost to move planimetrically through
each cell.
The value at each cell location represents the cost-per-unit distance for
moving through the cell. Each cell location value is multiplied by the cell
resolution while also compensating for diagonal movement to obtain the total
cost of passing through the cell.
The values of the cost raster can be integer or floating point, but they
cannot be negative or zero (you cannot have a negative or zero cost).
Input
surface raster (optional)
A raster defining the elevation values at each cell location.
The values are used to calculate the actual surface distance covered when
passing between cells.
Maximum
distance (optional)
The threshold that the accumulative cost values cannot exceed.
If an accumulative cost distance value exceeds this value, the output
value for the cell location will be NoData. The maximum distance is the extent
for which the accumulative cost distances are calculated.
The default distance is to the edge of the output raster.
Output
backlink raster (optional)
The output cost backlink raster.
The backlink raster contains values 0 through 8, which define the
direction or identify the next neighboring cell (the succeeding cell) along the
least accumulative cost path from a cell to reach its least-cost source, while
accounting for surface distance as well as horizontal and vertical surface
factors.
If the path is to pass into the right neighbor, the cell will be assigned
the value 1, 2 for the lower right diagonal cell, and continue clockwise. The
value 0 is reserved for source cells.
Input
horizontal raster (optional)
A raster defining the horizontal direction at each cell.
The values on the raster must be integers ranging from 0 to 360, with 0
degrees being north, or toward the top of the screen, and increasing clockwise.
Flat areas should be given a value of -1. The values at each location will be
used in conjunction with the Horizontal factor to determine the horizontal cost
incurred when moving from a cell to its neighbors.
Horizontal
factor (optional)
Specifies the relationship between the horizontal cost factor and the
horizontal relative moving angle (HRMA).
There are several factors with modifiers from which to select that
identify a defined horizontal factor graph. Additionally, a table can be used
to create a custom graph. The graphs are used to identify the horizontal factor
used in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: HF stands for horizontal
factor, which defines the horizontal difficulty encountered when moving from
one cell to the next; and HRMA stands for horizontal relative moving angle,
which identifies the angle between the horizontal direction from a cell and the
moving direction.
The Horizontal factor options are as follows:
·Binary—If the HRMA is less than the cut angle, the HF is set to the value
associated with the zero factor; otherwise, it is infinity.
·Forward—Only forward movement is allowed. The HRMA must be greater than or
equal to 0 and less than 90 degrees (0 <= HRMA < 90). If the HRMA is
greater than 0 and less than 45 degrees, the HF for the cell is set to the
value associated with the zero factor. If the HRMA is greater than or equal to
45 degrees, the side value modifier value is used. The HF for any HRMA equal to
or greater than 90 degrees is set to infinity.
·Linear—The HF is a linear function of the HRMA.
·Inverse Linear—The HF is an inverse linear function of the HRMA.
·Table—A table file will be used to define the horizontal factor graph used
to determine the HFs.
Modifiers to the horizontal factors are the following:
·Zero factor—The horizontal factor to be used when the HRMA is zero. This
factor positions the y-intercept for any of the horizontal factor functions.
·Cut angle—The HRMA angle beyond which the HF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear horizontal factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Side value—The HF when the HRMA is greater than or equal to 45 degrees and
less than 90 degrees when the Forward horizontal factor keyword is specified.
·Table name—The name of the table defining the HF.
Input
vertical raster (optional)
A raster defining the z-values for each cell location.
The values are used for calculating the slope used to identify the
vertical factor incurred when moving from one cell to another.
Vertical
factor (optional)
Specifies the relationship between the vertical cost factor and the
vertical relative moving angle (VRMA).
There are several factors with modifiers from which to select that
identify a defined vertical factor graph. Additionally, a table can be used to
create a custom graph. The graphs are used to identify the vertical factor used
in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: VF stands for vertical
factor, which defines the vertical difficulty encountered in moving from one
cell to the next; and VRMA stands for vertical relative moving angle, which
identifies the slope angle between the FROM or processing cell and the TO cell.
The Vertical factor options are as follows:
·Binary—If the VRMA is greater than the low-cut angle and less than the
high-cut angle, the VF is set to the value associated with the zero factor;
otherwise, it is infinity.
·Linear—The VF is a linear function of the VRMA.
·Symmetric Linear—The VF is a linear function of the VRMA in either the
negative or positive side of the VRMA, respectively, and the two linear
functions are symmetrical with respect to the VF (y) axis.
·Inverse Linear—The VF is an inverse linear function of the VRMA.
·Symmetric Inverse Linear—The VF is an inverse linear function of the VRMA
in either the negative or positive side of the VRMA, respectively, and the two
linear functions are symmetrical with respect to the VF (y) axis.
·Cos—The VF is the cosine-based function of the VRMA.
·Sec—The VF is the secant-based function of the VRMA.
·Cos-Sec—The VF is the cosine-based function of the VRMA when the VRMA is
negative and is the secant-based function of the VRMA when the VRMA is
nonnegative.
·Sec-Cos—The VF is the secant-based function of the VRMA when the VRMA is
negative and is the cosine-based function of the VRMA when the VRMA is
nonnegative.
·Table—A table file will be used to define the vertical-factor graph used
to determine the VFs.
Modifiers to the vertical keywords are the following:
·Zero factor—The vertical factor used when the VRMA is zero. This factor
positions the y-intercept of the specified function. By definition, the zero
factor is not applicable to any of the trigonometric vertical functions (COS,
SEC, COS-SEC, or SEC-COS). The y-intercept is defined by these functions.
·Low Cut angle—The VRMA angle below which the VF will be set to infinity.
·High Cut angle—The VRMA angle above which the VF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear vertical-factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Table name—The name of the table defining the VF.
Multiplier
to apply to costs (optional)
The multiplier to apply to the cost values.
This allows for control of the mode of travel or the magnitude at a
source. The greater the multiplier, the greater the cost to move through each
cell.
The values must be greater than zero. The default is 1.
Start cost
(optional)
The starting cost from which to begin the cost calculations.
Allows for the specification of the fixed cost associated with a source.
Instead of starting at a cost of zero, the cost algorithm will begin with the value
set by Start cost.
The values must be zero or greater. The default is 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost values.
The values must be zero or greater. The default is 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate, and
source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to
options, which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
A raster defining the impedance
or cost to move planimetrically through each cell.
The value at each cell
location represents the cost-per-unit distance for moving through the cell.
Each cell location value is multiplied by the cell resolution while also
compensating for diagonal movement to obtain the total cost of passing through
the cell.
The values of the cost
raster can be integer or floating point, but they cannot be negative or zero
(you cannot have a negative or zero cost).
خطوط نقطية تحدد الممانعة أو التكلفة للتحرك بشكل
مستوي عبر كل خلية.
تمثل القيمة في كل موقع خلية التكلفة لكل وحدة
مسافة للتنقل عبر الخلية. يتم ضرب كل قيمة موقع خلية في دقة الخلية مع التعويض
أيضًا عن الحركة القطرية للحصول على التكلفة الإجمالية للمرور عبر الخلية.
يمكن أن تكون قيم التكلفة النقطية عددًا صحيحًا أو
فاصلة عائمة ، لكن لا يمكن أن تكون سالبة أو صفرية (لا يمكن أن تكون لديك تكلفة
سالبة أو صفرية).
Input
surface raster (optional)
A raster defining the elevation values at each cell location.
The values are used to calculate the actual surface distance covered when
passing between cells.
Maximum
distance (optional)
The threshold that the accumulative cost values cannot exceed.
If an accumulative cost distance value exceeds this value, the output
value for the cell location will be NoData. The maximum distance is the extent
for which the accumulative cost distances are calculated.
The default distance is to the edge of the output raster.
Output
backlink raster (optional)
The output cost backlink raster.
The backlink raster contains values 0 through 8, which define the
direction or identify the next neighboring cell (the succeeding cell) along the
least accumulative cost path from a cell to reach its least-cost source, while
accounting for surface distance as well as horizontal and vertical surface
factors.
If the path is to pass into the right neighbor, the cell will be assigned
the value 1, 2 for the lower right diagonal cell, and continue clockwise. The
value 0 is reserved for source cells.
Input
horizontal raster (optional)
A raster defining the horizontal direction at each cell.
The values on the raster must be integers ranging from 0 to 360, with 0
degrees being north, or toward the top of the screen, and increasing clockwise.
Flat areas should be given a value of -1. The values at each location will be
used in conjunction with the Horizontal factor to determine the horizontal cost
incurred when moving from a cell to its neighbors.
Horizontal
factor (optional)
Specifies the relationship between the horizontal cost factor and the
horizontal relative moving angle (HRMA).
There are several factors with modifiers from which to select that
identify a defined horizontal factor graph. Additionally, a table can be used
to create a custom graph. The graphs are used to identify the horizontal factor
used in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: HF stands for horizontal
factor, which defines the horizontal difficulty encountered when moving from
one cell to the next; and HRMA stands for horizontal relative moving angle,
which identifies the angle between the horizontal direction from a cell and the
moving direction.
The Horizontal factor options are as follows:
·Binary—If the HRMA is less than the cut angle, the HF is set to the value
associated with the zero factor; otherwise, it is infinity.
·Forward—Only forward movement is allowed. The HRMA must be greater than or
equal to 0 and less than 90 degrees (0 <= HRMA < 90). If the HRMA is
greater than 0 and less than 45 degrees, the HF for the cell is set to the
value associated with the zero factor. If the HRMA is greater than or equal to
45 degrees, the side value modifier value is used. The HF for any HRMA equal to
or greater than 90 degrees is set to infinity.
·Linear—The HF is a linear function of the HRMA.
·Inverse Linear—The HF is an inverse linear function of the HRMA.
·Table—A table file will be used to define the horizontal factor graph used
to determine the HFs.
Modifiers to the horizontal factors are the following:
·Zero factor—The horizontal factor to be used when the HRMA is zero. This
factor positions the y-intercept for any of the horizontal factor functions.
·Cut angle—The HRMA angle beyond which the HF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear horizontal factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Side value—The HF when the HRMA is greater than or equal to 45 degrees and
less than 90 degrees when the Forward horizontal factor keyword is specified.
·Table name—The name of the table defining the HF.
Input
vertical raster (optional)
A raster defining the z-values for each cell location.
The values are used for calculating the slope used to identify the
vertical factor incurred when moving from one cell to another.
Vertical
factor (optional)
Specifies the relationship between the vertical cost factor and the
vertical relative moving angle (VRMA).
There are several factors with modifiers from which to select that
identify a defined vertical factor graph. Additionally, a table can be used to
create a custom graph. The graphs are used to identify the vertical factor used
in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: VF stands for vertical
factor, which defines the vertical difficulty encountered in moving from one
cell to the next; and VRMA stands for vertical relative moving angle, which
identifies the slope angle between the FROM or processing cell and the TO cell.
The Vertical factor options are as follows:
·Binary—If the VRMA is greater than the low-cut angle and less than the
high-cut angle, the VF is set to the value associated with the zero factor;
otherwise, it is infinity.
·Linear—The VF is a linear function of the VRMA.
·Symmetric Linear—The VF is a linear function of the VRMA in either the
negative or positive side of the VRMA, respectively, and the two linear
functions are symmetrical with respect to the VF (y) axis.
·Inverse Linear—The VF is an inverse linear function of the VRMA.
·Symmetric Inverse Linear—The VF is an inverse linear function of the VRMA
in either the negative or positive side of the VRMA, respectively, and the two
linear functions are symmetrical with respect to the VF (y) axis.
·Cos—The VF is the cosine-based function of the VRMA.
·Sec—The VF is the secant-based function of the VRMA.
·Cos-Sec—The VF is the cosine-based function of the VRMA when the VRMA is
negative and is the secant-based function of the VRMA when the VRMA is
nonnegative.
·Sec-Cos—The VF is the secant-based function of the VRMA when the VRMA is
negative and is the cosine-based function of the VRMA when the VRMA is
nonnegative.
·Table—A table file will be used to define the vertical-factor graph used
to determine the VFs.
Modifiers to the vertical keywords are the following:
·Zero factor—The vertical factor used when the VRMA is zero. This factor
positions the y-intercept of the specified function. By definition, the zero
factor is not applicable to any of the trigonometric vertical functions (COS,
SEC, COS-SEC, or SEC-COS). The y-intercept is defined by these functions.
·Low Cut angle—The VRMA angle below which the VF will be set to infinity.
·High Cut angle—The VRMA angle above which the VF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear vertical-factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Table name—The name of the table defining the VF.
Multiplier
to apply to costs (optional)
The multiplier to apply to the cost values.
This allows for control of the mode of travel or the magnitude at a
source. The greater the multiplier, the greater the cost to move through each
cell.
The values must be greater than zero. The default is 1.
Start cost
(optional)
The starting cost from which to begin the cost calculations.
Allows for the specification of the fixed cost associated with a source.
Instead of starting at a cost of zero, the cost algorithm will begin with the value
set by Start cost.
The values must be zero or greater. The default is 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost values.
The values must be zero or greater. The default is 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate, and
source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to
options, which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
4.Input surface raster (optional) إدخال
سطح النقطية (اختياري)
A raster defining the elevation
values at each cell location.
The values are used to
calculate the actual surface distance covered when passing between cells.
نقطية تحدد قيم الارتفاع في كل موقع خلية.
تُستخدم القيم لحساب مسافة السطح الفعلية التي يتم
تغطيتها عند المرور بين الخلايا.
Maximum
distance (optional)
The threshold that the accumulative cost values cannot exceed.
If an accumulative cost distance value exceeds this value, the output
value for the cell location will be NoData. The maximum distance is the extent
for which the accumulative cost distances are calculated.
The default distance is to the edge of the output raster.
Output
backlink raster (optional)
The output cost backlink raster.
The backlink raster contains values 0 through 8, which define the
direction or identify the next neighboring cell (the succeeding cell) along the
least accumulative cost path from a cell to reach its least-cost source, while
accounting for surface distance as well as horizontal and vertical surface
factors.
If the path is to pass into the right neighbor, the cell will be assigned
the value 1, 2 for the lower right diagonal cell, and continue clockwise. The
value 0 is reserved for source cells.
Input
horizontal raster (optional)
A raster defining the horizontal direction at each cell.
The values on the raster must be integers ranging from 0 to 360, with 0
degrees being north, or toward the top of the screen, and increasing clockwise.
Flat areas should be given a value of -1. The values at each location will be
used in conjunction with the Horizontal factor to determine the horizontal cost
incurred when moving from a cell to its neighbors.
Horizontal
factor (optional)
Specifies the relationship between the horizontal cost factor and the
horizontal relative moving angle (HRMA).
There are several factors with modifiers from which to select that
identify a defined horizontal factor graph. Additionally, a table can be used
to create a custom graph. The graphs are used to identify the horizontal factor
used in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: HF stands for horizontal
factor, which defines the horizontal difficulty encountered when moving from
one cell to the next; and HRMA stands for horizontal relative moving angle,
which identifies the angle between the horizontal direction from a cell and the
moving direction.
The Horizontal factor options are as follows:
·Binary—If the HRMA is less than the cut angle, the HF is set to the value
associated with the zero factor; otherwise, it is infinity.
·Forward—Only forward movement is allowed. The HRMA must be greater than or
equal to 0 and less than 90 degrees (0 <= HRMA < 90). If the HRMA is
greater than 0 and less than 45 degrees, the HF for the cell is set to the
value associated with the zero factor. If the HRMA is greater than or equal to
45 degrees, the side value modifier value is used. The HF for any HRMA equal to
or greater than 90 degrees is set to infinity.
·Linear—The HF is a linear function of the HRMA.
·Inverse Linear—The HF is an inverse linear function of the HRMA.
·Table—A table file will be used to define the horizontal factor graph used
to determine the HFs.
Modifiers to the horizontal factors are the following:
·Zero factor—The horizontal factor to be used when the HRMA is zero. This
factor positions the y-intercept for any of the horizontal factor functions.
·Cut angle—The HRMA angle beyond which the HF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse Linear
horizontal factor keywords. The slope is specified as a fraction of rise over
run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Side value—The HF when the HRMA is greater than or equal to 45 degrees and
less than 90 degrees when the Forward horizontal factor keyword is specified.
·Table name—The name of the table defining the HF.
Input
vertical raster (optional)
A raster defining the z-values for each cell location.
The values are used for calculating the slope used to identify the
vertical factor incurred when moving from one cell to another.
Vertical
factor (optional)
Specifies the relationship between the vertical cost factor and the
vertical relative moving angle (VRMA).
There are several factors with modifiers from which to select that
identify a defined vertical factor graph. Additionally, a table can be used to
create a custom graph. The graphs are used to identify the vertical factor used
in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: VF stands for vertical
factor, which defines the vertical difficulty encountered in moving from one
cell to the next; and VRMA stands for vertical relative moving angle, which
identifies the slope angle between the FROM or processing cell and the TO cell.
The Vertical factor options are as follows:
·Binary—If the VRMA is greater than the low-cut angle and less than the
high-cut angle, the VF is set to the value associated with the zero factor;
otherwise, it is infinity.
·Linear—The VF is a linear function of the VRMA.
·Symmetric Linear—The VF is a linear function of the VRMA in either the
negative or positive side of the VRMA, respectively, and the two linear
functions are symmetrical with respect to the VF (y) axis.
·Inverse Linear—The VF is an inverse linear function of the VRMA.
·Symmetric Inverse Linear—The VF is an inverse linear function of the VRMA
in either the negative or positive side of the VRMA, respectively, and the two
linear functions are symmetrical with respect to the VF (y) axis.
·Cos—The VF is the cosine-based function of the VRMA.
·Sec—The VF is the secant-based function of the VRMA.
·Cos-Sec—The VF is the cosine-based function of the VRMA when the VRMA is
negative and is the secant-based function of the VRMA when the VRMA is
nonnegative.
·Sec-Cos—The VF is the secant-based function of the VRMA when the VRMA is
negative and is the cosine-based function of the VRMA when the VRMA is
nonnegative.
·Table—A table file will be used to define the vertical-factor graph used
to determine the VFs.
Modifiers to the vertical keywords are the following:
·Zero factor—The vertical factor used when the VRMA is zero. This factor
positions the y-intercept of the specified function. By definition, the zero
factor is not applicable to any of the trigonometric vertical functions (COS,
SEC, COS-SEC, or SEC-COS). The y-intercept is defined by these functions.
·Low Cut angle—The VRMA angle below which the VF will be set to infinity.
·High Cut angle—The VRMA angle above which the VF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear vertical-factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Table name—The name of the table defining the VF.
Multiplier
to apply to costs (optional)
The multiplier to apply to the cost values.
This allows for control of the mode of travel or the magnitude at a
source. The greater the multiplier, the greater the cost to move through each
cell.
The values must be greater than zero. The default is 1.
Start cost
(optional)
The starting cost from which to begin the cost calculations.
Allows for the specification of the fixed cost associated with a source. Instead
of starting at a cost of zero, the cost algorithm will begin with the value set
by Start cost.
The values must be zero or greater. The default is 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost
values.
The values must be zero or greater. The default is 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to
options, which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
The threshold that the
accumulative cost values cannot exceed.
If an accumulative cost
distance value exceeds this value, the output value for the cell location will
be NoData. The maximum distance is the extent for which the accumulative cost
distances are calculated.
The default distance is
to the edge of the output raster.
الحد الذي لا يمكن لقيم التكلفة التراكمية تجاوزه.
إذا تجاوزت قيمة مسافة التكلفة التراكمية هذه
القيمة ، فستكون قيمة الإخراج لموقع الخلية NoData.
المسافة القصوى هي المدى الذي يتم من خلاله حساب مسافات التكلفة التراكمية.
المسافة الافتراضية إلى حافة البيانات النقطية
الناتجة.
Output
backlink raster (optional)
The output cost backlink raster.
The backlink raster contains values 0 through 8, which define the
direction or identify the next neighboring cell (the succeeding cell) along the
least accumulative cost path from a cell to reach its least-cost source, while
accounting for surface distance as well as horizontal and vertical surface
factors.
If the path is to pass into the right neighbor, the cell will be assigned
the value 1, 2 for the lower right diagonal cell, and continue clockwise. The
value 0 is reserved for source cells.
Input
horizontal raster (optional)
A raster defining the horizontal direction at each cell.
The values on the raster must be integers ranging from 0 to 360, with 0 degrees
being north, or toward the top of the screen, and increasing clockwise. Flat
areas should be given a value of -1. The values at each location will be used
in conjunction with the Horizontal factor to determine the horizontal cost
incurred when moving from a cell to its neighbors.
Horizontal
factor (optional)
Specifies the relationship between the horizontal cost factor and the
horizontal relative moving angle (HRMA).
There are several factors with modifiers from which to select that
identify a defined horizontal factor graph. Additionally, a table can be used
to create a custom graph. The graphs are used to identify the horizontal factor
used in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: HF stands for horizontal
factor, which defines the horizontal difficulty encountered when moving from
one cell to the next; and HRMA stands for horizontal relative moving angle,
which identifies the angle between the horizontal direction from a cell and the
moving direction.
The Horizontal factor options are as follows:
·Binary—If the HRMA is less than the cut angle, the HF is set to the value
associated with the zero factor; otherwise, it is infinity.
·Forward—Only forward movement is allowed. The HRMA must be greater than or
equal to 0 and less than 90 degrees (0 <= HRMA < 90). If the HRMA is
greater than 0 and less than 45 degrees, the HF for the cell is set to the
value associated with the zero factor. If the HRMA is greater than or equal to
45 degrees, the side value modifier value is used. The HF for any HRMA equal to
or greater than 90 degrees is set to infinity.
·Linear—The HF is a linear function of the HRMA.
·Inverse Linear—The HF is an inverse linear function of the HRMA.
·Table—A table file will be used to define the horizontal factor graph used
to determine the HFs.
Modifiers to the horizontal factors are the following:
·Zero factor—The horizontal factor to be used when the HRMA is zero. This
factor positions the y-intercept for any of the horizontal factor functions.
·Cut angle—The HRMA angle beyond which the HF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear horizontal factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Side value—The HF when the HRMA is greater than or equal to 45 degrees and
less than 90 degrees when the Forward horizontal factor keyword is specified.
·Table name—The name of the table defining the HF.
Input
vertical raster (optional)
A raster defining the z-values for each cell location.
The values are used for calculating the slope used to identify the
vertical factor incurred when moving from one cell to another.
Vertical
factor (optional)
Specifies the relationship between the vertical cost factor and the
vertical relative moving angle (VRMA).
There are several factors with modifiers from which to select that
identify a defined vertical factor graph. Additionally, a table can be used to
create a custom graph. The graphs are used to identify the vertical factor used
in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: VF stands for vertical
factor, which defines the vertical difficulty encountered in moving from one
cell to the next; and VRMA stands for vertical relative moving angle, which
identifies the slope angle between the FROM or processing cell and the TO cell.
The Vertical factor options are as follows:
·Binary—If the VRMA is greater than the low-cut angle and less than the
high-cut angle, the VF is set to the value associated with the zero factor;
otherwise, it is infinity.
·Linear—The VF is a linear function of the VRMA.
·Symmetric Linear—The VF is a linear function of the VRMA in either the
negative or positive side of the VRMA, respectively, and the two linear
functions are symmetrical with respect to the VF (y) axis.
·Inverse Linear—The VF is an inverse linear function of the VRMA.
·Symmetric Inverse Linear—The VF is an inverse linear function of the VRMA
in either the negative or positive side of the VRMA, respectively, and the two
linear functions are symmetrical with respect to the VF (y) axis.
·Cos—The VF is the cosine-based function of the VRMA.
·Sec—The VF is the secant-based function of the VRMA.
·Cos-Sec—The VF is the cosine-based function of the VRMA when the VRMA is
negative and is the secant-based function of the VRMA when the VRMA is
nonnegative.
·Sec-Cos—The VF is the secant-based function of the VRMA when the VRMA is
negative and is the cosine-based function of the VRMA when the VRMA is
nonnegative.
·Table—A table file will be used to define the vertical-factor graph used
to determine the VFs.
Modifiers to the vertical keywords are the following:
·Zero factor—The vertical factor used when the VRMA is zero. This factor
positions the y-intercept of the specified function. By definition, the zero
factor is not applicable to any of the trigonometric vertical functions (COS,
SEC, COS-SEC, or SEC-COS). The y-intercept is defined by these functions.
·Low Cut angle—The VRMA angle below which the VF will be set to infinity.
·High Cut angle—The VRMA angle above which the VF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear vertical-factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Table name—The name of the table defining the VF.
Multiplier
to apply to costs (optional)
The multiplier to apply to the cost values.
This allows for control of the mode of travel or the magnitude at a
source. The greater the multiplier, the greater the cost to move through each
cell.
The values must be greater than zero. The default is 1.
Start cost
(optional)
The starting cost from which to begin the cost calculations.
Allows for the specification of the fixed cost associated with a source.
Instead of starting at a cost of zero, the cost algorithm will begin with the
value set by Start cost.
The values must be zero or greater. The default is 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost
values.
The values must be zero or greater. The default is 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to
options, which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
The backlink raster
contains values 0 through 8, which define the direction or identify the next
neighboring cell (the succeeding cell) along the least accumulative cost path
from a cell to reach its least-cost source, while accounting for surface
distance as well as horizontal and vertical surface factors.
If the path is to pass
into the right neighbor, the cell will be assigned the value 1, 2 for the lower
right diagonal cell, and continue clockwise. The value 0 is reserved for source
cells.
تكلفة الخرج النقطية للوصلة الخلفية.
تحتوي البيانات النقطية للوصلة الخلفية على القيم
من 0 إلى 8 ، والتي تحدد الاتجاه أو تحدد الخلية المجاورة التالية (الخلية
التالية) على طول مسار التكلفة الأقل تراكمًا من الخلية للوصول إلى مصدرها الأقل
تكلفة ، مع احتساب المسافة السطحية وكذلك الأفقية وعوامل السطح العمودي.
إذا كان المسار سيمر إلى الجوار الأيمن ، فسيتم
تعيين القيمة 1 ، 2 للخلية القطرية السفلية اليمنى للخلية ، والمتابعة في اتجاه
عقارب الساعة. القيمة 0 محجوزة للخلايا المصدر.
Input
horizontal raster (optional)
A raster defining the horizontal direction at each cell.
The values on the raster must be integers ranging from 0 to 360, with 0
degrees being north, or toward the top of the screen, and increasing clockwise.
Flat areas should be given a value of -1. The values at each location will be
used in conjunction with the Horizontal factor to determine the horizontal cost
incurred when moving from a cell to its neighbors.
Horizontal
factor (optional)
Specifies the relationship between the horizontal cost factor and the
horizontal relative moving angle (HRMA).
There are several factors with modifiers from which to select that
identify a defined horizontal factor graph. Additionally, a table can be used
to create a custom graph. The graphs are used to identify the horizontal factor
used in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: HF stands for horizontal
factor, which defines the horizontal difficulty encountered when moving from
one cell to the next; and HRMA stands for horizontal relative moving angle,
which identifies the angle between the horizontal direction from a cell and the
moving direction.
The Horizontal factor options are as follows:
·Binary—If the HRMA is less than the cut angle, the HF is set to the value
associated with the zero factor; otherwise, it is infinity.
·Forward—Only forward movement is allowed. The HRMA must be greater than or
equal to 0 and less than 90 degrees (0 <= HRMA < 90). If the HRMA is
greater than 0 and less than 45 degrees, the HF for the cell is set to the
value associated with the zero factor. If the HRMA is greater than or equal to
45 degrees, the side value modifier value is used. The HF for any HRMA equal to
or greater than 90 degrees is set to infinity.
·Linear—The HF is a linear function of the HRMA.
·Inverse Linear—The HF is an inverse linear function of the HRMA.
·Table—A table file will be used to define the horizontal factor graph used
to determine the HFs.
Modifiers to the horizontal factors are the following:
·Zero factor—The horizontal factor to be used when the HRMA is zero. This
factor positions the y-intercept for any of the horizontal factor functions.
·Cut angle—The HRMA angle beyond which the HF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear horizontal factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Side value—The HF when the HRMA is greater than or equal to 45 degrees and
less than 90 degrees when the Forward horizontal factor keyword is specified.
·Table name—The name of the table defining the HF.
Input
vertical raster (optional)
A raster defining the z-values for each cell location.
The values are used for calculating the slope used to identify the
vertical factor incurred when moving from one cell to another.
Vertical
factor (optional)
Specifies the relationship between the vertical cost factor and the
vertical relative moving angle (VRMA).
There are several factors with modifiers from which to select that
identify a defined vertical factor graph. Additionally, a table can be used to
create a custom graph. The graphs are used to identify the vertical factor used
in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: VF stands for vertical
factor, which defines the vertical difficulty encountered in moving from one
cell to the next; and VRMA stands for vertical relative moving angle, which
identifies the slope angle between the FROM or processing cell and the TO cell.
The Vertical factor options are as follows:
·Binary—If the VRMA is greater than the low-cut angle and less than the
high-cut angle, the VF is set to the value associated with the zero factor;
otherwise, it is infinity.
·Linear—The VF is a linear function of the VRMA.
·Symmetric Linear—The VF is a linear function of the VRMA in either the
negative or positive side of the VRMA, respectively, and the two linear
functions are symmetrical with respect to the VF (y) axis.
·Inverse Linear—The VF is an inverse linear function of the VRMA.
·Symmetric Inverse Linear—The VF is an inverse linear function of the VRMA
in either the negative or positive side of the VRMA, respectively, and the two
linear functions are symmetrical with respect to the VF (y) axis.
·Cos—The VF is the cosine-based function of the VRMA.
·Sec—The VF is the secant-based function of the VRMA.
·Cos-Sec—The VF is the cosine-based function of the VRMA when the VRMA is
negative and is the secant-based function of the VRMA when the VRMA is
nonnegative.
·Sec-Cos—The VF is the secant-based function of the VRMA when the VRMA is
negative and is the cosine-based function of the VRMA when the VRMA is
nonnegative.
·Table—A table file will be used to define the vertical-factor graph used
to determine the VFs.
Modifiers to the vertical keywords are the following:
·Zero factor—The vertical factor used when the VRMA is zero. This factor
positions the y-intercept of the specified function. By definition, the zero
factor is not applicable to any of the trigonometric vertical functions (COS,
SEC, COS-SEC, or SEC-COS). The y-intercept is defined by these functions.
·Low Cut angle—The VRMA angle below which the VF will be set to infinity.
·High Cut angle—The VRMA angle above which the VF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear vertical-factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Table name—The name of the table defining the VF.
Multiplier
to apply to costs (optional)
The multiplier to apply to the cost values.
This allows for control of the mode of travel or the magnitude at a
source. The greater the multiplier, the greater the cost to move through each
cell.
The values must be greater than zero. The default is 1.
Start cost
(optional)
The starting cost from which to begin the cost calculations.
Allows for the specification of the fixed cost associated with a source.
Instead of starting at a cost of zero, the cost algorithm will begin with the
value set by Start cost.
The values must be zero or greater. The default is 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost
values.
The values must be zero or greater. The default is 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to
options, which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
A raster defining the
horizontal direction at each cell.
The values on the raster
must be integers ranging from 0 to 360, with 0 degrees being north, or toward
the top of the screen, and increasing clockwise. Flat areas should be given a
value of -1. The values at each location will be used in conjunction with the
Horizontal factor to determine the horizontal cost incurred when moving from a
cell to its neighbors.
نقطية تحدد الاتجاه الأفقي في كل خلية.
يجب أن تكون القيم الموجودة في البيانات النقطية
أعدادًا صحيحة تتراوح من 0 إلى 360 ، بحيث تكون 0 درجة شمالًا ، أو باتجاه الجزء
العلوي من الشاشة ، وتتزايد في اتجاه عقارب الساعة. يجب إعطاء المساحات المستوية
القيمة -1. سيتم استخدام القيم في كل موقع بالاقتران مع العامل الأفقي لتحديد
التكلفة الأفقية المتكبدة عند الانتقال من خلية إلى جيرانها.
Horizontal
factor (optional)
Specifies the relationship between the horizontal cost factor and the
horizontal relative moving angle (HRMA).
There are several factors with modifiers from which to select that
identify a defined horizontal factor graph. Additionally, a table can be used
to create a custom graph. The graphs are used to identify the horizontal factor
used in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: HF stands for horizontal
factor, which defines the horizontal difficulty encountered when moving from
one cell to the next; and HRMA stands for horizontal relative moving angle,
which identifies the angle between the horizontal direction from a cell and the
moving direction.
The Horizontal factor options are as follows:
·Binary—If the HRMA is less than the cut angle, the HF is set to the value
associated with the zero factor; otherwise, it is infinity.
·Forward—Only forward movement is allowed. The HRMA must be greater than or
equal to 0 and less than 90 degrees (0 <= HRMA < 90). If the HRMA is
greater than 0 and less than 45 degrees, the HF for the cell is set to the
value associated with the zero factor. If the HRMA is greater than or equal to
45 degrees, the side value modifier value is used. The HF for any HRMA equal to
or greater than 90 degrees is set to infinity.
·Linear—The HF is a linear function of the HRMA.
·Inverse Linear—The HF is an inverse linear function of the HRMA.
·Table—A table file will be used to define the horizontal factor graph used
to determine the HFs.
Modifiers to the horizontal factors are the following:
·Zero factor—The horizontal factor to be used when the HRMA is zero. This
factor positions the y-intercept for any of the horizontal factor functions.
·Cut angle—The HRMA angle beyond which the HF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear horizontal factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Side value—The HF when the HRMA is greater than or equal to 45 degrees and
less than 90 degrees when the Forward horizontal factor keyword is specified.
·Table name—The name of the table defining the HF.
Input
vertical raster (optional)
A raster defining the z-values for each cell location.
The values are used for calculating the slope used to identify the
vertical factor incurred when moving from one cell to another.
Vertical
factor (optional)
Specifies the relationship between the vertical cost factor and the
vertical relative moving angle (VRMA).
There are several factors with modifiers from which to select that
identify a defined vertical factor graph. Additionally, a table can be used to
create a custom graph. The graphs are used to identify the vertical factor used
in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: VF stands for vertical
factor, which defines the vertical difficulty encountered in moving from one
cell to the next; and VRMA stands for vertical relative moving angle, which
identifies the slope angle between the FROM or processing cell and the TO cell.
The Vertical factor options are as follows:
·Binary—If the VRMA is greater than the low-cut angle and less than the
high-cut angle, the VF is set to the value associated with the zero factor;
otherwise, it is infinity.
·Linear—The VF is a linear function of the VRMA.
·Symmetric Linear—The VF is a linear function of the VRMA in either the
negative or positive side of the VRMA, respectively, and the two linear
functions are symmetrical with respect to the VF (y) axis.
·Inverse Linear—The VF is an inverse linear function of the VRMA.
·Symmetric Inverse Linear—The VF is an inverse linear function of the VRMA
in either the negative or positive side of the VRMA, respectively, and the two
linear functions are symmetrical with respect to the VF (y) axis.
·Cos—The VF is the cosine-based function of the VRMA.
·Sec—The VF is the secant-based function of the VRMA.
·Cos-Sec—The VF is the cosine-based function of the VRMA when the VRMA is
negative and is the secant-based function of the VRMA when the VRMA is
nonnegative.
·Sec-Cos—The VF is the secant-based function of the VRMA when the VRMA is
negative and is the cosine-based function of the VRMA when the VRMA is
nonnegative.
·Table—A table file will be used to define the vertical-factor graph used
to determine the VFs.
Modifiers to the vertical keywords are the following:
·Zero factor—The vertical factor used when the VRMA is zero. This factor
positions the y-intercept of the specified function. By definition, the zero
factor is not applicable to any of the trigonometric vertical functions (COS,
SEC, COS-SEC, or SEC-COS). The y-intercept is defined by these functions.
·Low Cut angle—The VRMA angle below which the VF will be set to infinity.
·High Cut angle—The VRMA angle above which the VF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear vertical-factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Table name—The name of the table defining the VF.
Multiplier
to apply to costs (optional)
The multiplier to apply to the cost values.
This allows for control of the mode of travel or the magnitude at a
source. The greater the multiplier, the greater the cost to move through each
cell.
The values must be greater than zero. The default is 1.
Start cost
(optional)
The starting cost from which to begin the cost calculations.
Allows for the specification of the fixed cost associated with a source.
Instead of starting at a cost of zero, the cost algorithm will begin with the
value set by Start cost.
The values must be zero or greater. The default is 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost
values.
The values must be zero or greater. The default is 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to options,
which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
8.Horizontal factor (optional) عامل
أفقي (اختياري)
يحدد العلاقة بين عامل التكلفة الأفقي وزاوية
الحركة النسبية الأفقية (HRMA).
هناك العديد من العوامل ذات المعدلات التي يمكن من
خلالها تحديد رسم بياني عامل أفقي محدد. بالإضافة إلى ذلك ، يمكن استخدام الجدول
لإنشاء رسم بياني مخصص. تُستخدم الرسوم البيانية لتحديد العامل الأفقي المستخدم في
حساب التكلفة الإجمالية للانتقال إلى خلية مجاورة.
في الوصف أدناه ، يتم استخدام اثنين من
الاختصارات: HF تعني العامل الأفقي ، والذي يحدد الصعوبة الأفقية التي يتم
مواجهتها عند الانتقال من خلية إلى أخرى ؛ يرمز HRMA إلى
زاوية الحركة النسبية الأفقية ، والتي تحدد الزاوية بين الاتجاه الأفقي من الخلية
والاتجاه المتحرك.
خيارات العامل الأفقي هي كما يلي:
• ثنائي - إذا كان HRMA أقل
من زاوية القطع ، يتم ضبط HF على
القيمة المرتبطة بعامل الصفر ؛ خلاف ذلك ، فمن اللانهاية.
• إلى الأمام - يسمح فقط
بالحركة إلى الأمام. يجب أن يكون HRMA أكبر
من أو يساوي 0 وأقل من 90 درجة (0 <= HRMA <90). إذا
كانت HRMA أكبر من 0 وأقل من 45
درجة ، يتم تعيين HF للخلية على القيمة المرتبطة بعامل الصفر. إذا كانت HRMA أكبر
من أو تساوي 45 درجة ، يتم استخدام قيمة معدل القيمة الجانبية. يتم تعيين HF لأي HRMA يساوي
أو أكبر من 90 درجة إلى اللانهاية.
• الخطي - HF هي
دالة خطية من HRMA.
• خطي معكوس - عامل
التردد هو دالة خطية عكسية في HRMA.
• الجدول - سيتم استخدام
ملف الجدول لتحديد الرسم البياني للعوامل الأفقية المستخدم لتحديد HFs.
معدِّلات العوامل الأفقية هي كالتالي:
• العامل الصفري - العامل
الأفقي الذي يجب استخدامه عندما يكون HRMA
صفرًا. يضع هذا العامل موضع تقاطع y لأي
من وظائف العامل الأفقي.
• زاوية القطع - زاوية HRMA التي
بعدها سيتم ضبط HF على اللانهاية.
• المنحدر - ميل الخط
المستقيم المستخدم مع الكلمات الأساسية للعوامل الأفقية الخطية والمعكوسة. يتم
تحديد المنحدر على أنه جزء من الارتفاع على المدى (على سبيل المثال ، 45 في المائة
منحدر هو 1/45 ، والذي يتم إدخاله على أنه 0.02222).
• قيمة الجانب - HF عندما
يكون HRMA أكبر من أو يساوي 45
درجة وأقل من 90 درجة عند تحديد الكلمة الأساسية للعامل الأفقي الأمامي.
• اسم الجدول - اسم
الجدول الذي يعرف HF.
Input
vertical raster (optional)
A raster defining the z-values for each cell location.
The values are used for calculating the slope used to identify the
vertical factor incurred when moving from one cell to another.
Vertical
factor (optional)
Specifies the relationship between the vertical cost factor and the
vertical relative moving angle (VRMA).
There are several factors with modifiers from which to select that
identify a defined vertical factor graph. Additionally, a table can be used to
create a custom graph. The graphs are used to identify the vertical factor used
in calculating the total cost for moving into a neighboring cell.
In the descriptions below, two acronyms are used: VF stands for vertical
factor, which defines the vertical difficulty encountered in moving from one
cell to the next; and VRMA stands for vertical relative moving angle, which
identifies the slope angle between the FROM or processing cell and the TO cell.
The Vertical factor options are as follows:
·Binary—If the VRMA is greater than the low-cut angle and less than the
high-cut angle, the VF is set to the value associated with the zero factor;
otherwise, it is infinity.
·Linear—The VF is a linear function of the VRMA.
·Symmetric Linear—The VF is a linear function of the VRMA in either the
negative or positive side of the VRMA, respectively, and the two linear
functions are symmetrical with respect to the VF (y) axis.
·Inverse Linear—The VF is an inverse linear function of the VRMA.
·Symmetric Inverse Linear—The VF is an inverse linear function of the VRMA
in either the negative or positive side of the VRMA, respectively, and the two
linear functions are symmetrical with respect to the VF (y) axis.
·Cos—The VF is the cosine-based function of the VRMA.
·Sec—The VF is the secant-based function of the VRMA.
·Cos-Sec—The VF is the cosine-based function of the VRMA when the VRMA is
negative and is the secant-based function of the VRMA when the VRMA is
nonnegative.
·Sec-Cos—The VF is the secant-based function of the VRMA when the VRMA is
negative and is the cosine-based function of the VRMA when the VRMA is
nonnegative.
·Table—A table file will be used to define the vertical-factor graph used
to determine the VFs.
Modifiers to the vertical keywords are the following:
·Zero factor—The vertical factor used when the VRMA is zero. This factor
positions the y-intercept of the specified function. By definition, the zero
factor is not applicable to any of the trigonometric vertical functions (COS,
SEC, COS-SEC, or SEC-COS). The y-intercept is defined by these functions.
·Low Cut angle—The VRMA angle below which the VF will be set to infinity.
·High Cut angle—The VRMA angle above which the VF will be set to infinity.
·Slope—The slope of the straight line used with the Linear and Inverse
Linear vertical-factor keywords. The slope is specified as a fraction of rise
over run (for example, 45 percent slope is 1/45, which is input as 0.02222).
·Table name—The name of the table defining the VF.
Multiplier
to apply to costs (optional)
The multiplier to apply to the cost values.
This allows for control of the mode of travel or the magnitude at a
source. The greater the multiplier, the greater the cost to move through each
cell.
The values must be greater than zero. The default is 1.
Start cost
(optional)
The starting cost from which to begin the cost calculations.
Allows for the specification of the fixed cost associated with a source.
Instead of starting at a cost of zero, the cost algorithm will begin with the
value set by Start cost.
The values must be zero or greater. The default is 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost
values.
The values must be zero or greater. The default is 0.
Capacity (optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to
options, which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
9.Multiplier to apply to costs (optional) المضاعف لتطبيقه على التكاليف (اختياري)
The multiplier to apply
to the cost values.
This allows for control
of the mode of travel or the magnitude at a source. The greater the multiplier,
the greater the cost to move through each cell.
The values must be
greater than zero. The default is 1.
المضاعف المراد تطبيقه على قيم التكلفة.
يسمح هذا بالتحكم في طريقة السفر أو المقدار عند
المصدر. كلما زاد المضاعف ، زادت تكلفة التنقل عبر كل خلية.
يجب أن تكون القيم أكبر من الصفر. الافتراضي هو 1.
Start cost
(optional)
The starting cost from which to begin the cost calculations.
Allows for the specification of the fixed cost associated with a source.
Instead of starting at a cost of zero, the cost algorithm will begin with the
value set by Start cost.
The values must be zero or greater. The default is 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost
values.
The values must be zero or greater. The default is 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to
options, which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
10.Start cost (optional) تكلفة البدء
(اختياري)
The starting cost from
which to begin the cost calculations.
Allows for the
specification of the fixed cost associated with a source. Instead of starting
at a cost of zero, the cost algorithm will begin with the value set by Start
cost.
The values must be zero
or greater. The default is 0.
تكلفة البداية التي تبدأ منها حسابات التكلفة.
يسمح بتحديد التكلفة الثابتة المرتبطة بالمصدر.
بدلاً من البدء بتكلفة صفر ، ستبدأ خوارزمية التكلفة بالقيمة التي تحددها تكلفة
البدء.
يجب أن تكون القيم صفرًا أو أكبر. الافتراضي هو 0.
Accumulative
cost resistance rate (optional)
This parameter simulates the increase in the effort to overcome costs as
the accumulative cost increases. It is used to model fatigue of the traveler.
The growing accumulative cost to reach a cell is multiplied by the resistance
rate and added to the cost to move into the subsequent cell.
It is a modified version of a compound interest rate formula that is used
to calculate the apparent cost of moving through a cell. As the value of the
resistance rate increases, it increases the cost of the cells that are visited
later. The greater the resistance rate, the more additional cost is added to
reach the next cell, which is compounded for each subsequent movement. Since
the resistance rate is similar to a compound rate and generally the
accumulative cost values are very large, small resistance rates are suggested,
such as 0.02, 0.005, or even smaller, depending on the accumulative cost values.
The values must be zero or greater. The default is 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to options,
which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
11.Accumulative cost resistance rate (optional) معدل مقاومة التكلفة التراكمية (اختياري)
This parameter simulates
the increase in the effort to overcome costs as the accumulative cost
increases. It is used to model fatigue of the traveler. The growing
accumulative cost to reach a cell is multiplied by the resistance rate and
added to the cost to move into the subsequent cell.
It is a modified version
of a compound interest rate formula that is used to calculate the apparent cost
of moving through a cell. As the value of the resistance rate increases, it
increases the cost of the cells that are visited later. The greater the
resistance rate, the more additional cost is added to reach the next cell,
which is compounded for each subsequent movement. Since the resistance rate is similar
to a compound rate and generally the accumulative cost values are very large,
small resistance rates are suggested, such as 0.02, 0.005, or even smaller,
depending on the accumulative cost values.
The values must be zero
or greater. The default is 0.
تحاكي هذه المعلمة الزيادة في الجهد المبذول
للتغلب على التكاليف مع زيادة التكلفة المتراكمة. يتم استخدامه لنمذجة تعب
المسافر. يتم مضاعفة التكلفة التراكمية المتزايدة للوصول إلى خلية في معدل
المقاومة وتضاف إلى تكلفة الانتقال إلى الخلية التالية.
إنها نسخة معدلة من صيغة معدل الفائدة المركبة
التي تُستخدم لحساب التكلفة الظاهرية للتنقل عبر خلية. كلما زادت قيمة معدل
المقاومة ، زادت تكلفة الخلايا التي تمت زيارتها لاحقًا. كلما زاد معدل المقاومة ،
تمت إضافة تكلفة إضافية للوصول إلى الخلية التالية ، والتي تتضاعف مع كل حركة
لاحقة. نظرًا لأن معدل المقاومة مشابه للمعدل المركب وعمومًا فإن قيم التكلفة
التراكمية كبيرة جدًا ، يتم اقتراح معدلات مقاومة صغيرة ، مثل 0.02 أو 0.005 أو
حتى أصغر ، اعتمادًا على قيم التكلفة التراكمية.
يجب أن تكون القيم صفرًا أو أكبر. الافتراضي هو 0.
Capacity
(optional)
The cost capacity for the traveler for a source.
The cost calculations continue for each source until the specified
capacity is reached.
The values must be greater than zero. The default capacity is to the edge
of the output raster.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to options,
which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
12.Capacity (optional) السعة (اختياري)
The cost capacity for
the traveler for a source.
The cost calculations
continue for each source until the specified capacity is reached.
The values must be
greater than zero. The default capacity is to the edge of the output raster.
سعة التكلفة للمسافر بالنسبة للمصدر.
تستمر حسابات التكلفة لكل مصدر حتى يتم الوصول إلى
السعة المحددة.
يجب أن تكون القيم أكبر من الصفر. السعة
الافتراضية إلى حافة البيانات النقطية للإخراج.
Travel
direction (optional)
Specifies the direction of the traveler when applying horizontal and
vertical factors, the source resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source resistance
rate, and source starting cost will be applied beginning at the input source,
and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source resistance rate,
and source starting cost will be applied beginning at each nonsource cell and
travel back to the input source.
If you select the String option, you can choose between from and to
options, which will be applied to all sources.
If you select the Field option, you can select the field from the source
data that determines the direction to use for each source. The field must
contain the text string FROM_SOURCE or TO_SOURCE.
13.Travel direction (optional) اتجاه
السفر (اختياري)
Specifies the direction
of the traveler when applying horizontal and vertical factors, the source
resistance rate, and the source starting cost.
·FROM_SOURCE—The horizontal factor, vertical factor, source
resistance rate, and source starting cost will be applied beginning at the
input source, and travel out to the nonsource cells. This is the default.
·TO_SOURCE—The horizontal factor, vertical factor, source
resistance rate, and source starting cost will be applied beginning at each
nonsource cell and travel back to the input source.
If you select the String
option, you can choose between from and to options, which will be applied to all
sources.
If you select the Field
option, you can select the field from the source data that determines the
direction to use for each source. The field must contain the text string
FROM_SOURCE or TO_SOURCE.
يحدد اتجاه المسافر عند تطبيق عوامل أفقية ورأسية
، ومعدل مقاومة المصدر ، وتكلفة بدء المصدر.
• FROM_SOURCE - سيتم تطبيق العامل الأفقي والعامل الرأسي ومعدل مقاومة المصدر
وتكلفة بدء المصدر بدءًا من مصدر الإدخال ، ثم السفر للخارج إلى الخلايا غير
المصدر. هذا هو الافتراضي.
• TO_SOURCE - سيتم تطبيق العامل الأفقي والعامل الرأسي ومعدل مقاومة المصدر
وتكلفة بدء المصدر بدءًا من كل خلية غير مصدر والعودة إلى مصدر الإدخال.
إذا قمت بتحديد خيار String ،
يمكنك الاختيار بين الخيارات من وإلى ، والتي سيتم تطبيقها على جميع المصادر.
إذا قمت بتحديد خيار الحقل ، يمكنك تحديد الحقل من
البيانات المصدر التي تحدد الاتجاه الذي يجب استخدامه لكل مصدر. يجب أن يحتوي
الحقل على السلسلة النصية FROM_SOURCE أو TO_SOURCE.
اليك صفحه ومجموعة على الفيس بوك لتعلم أكثر بما يخص نظم المعلومات الجغرافية (GIS) و برنامج ArcGIS Pro من خلال هذه الروابط:
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