Make Location-Allocation Layer Tool
أداة إنشاء طبقة تخصيص الموقع
ArcMap ArcGIS
How to use Make Location-Allocation Layer Tool in Arc Toolbox ArcMap ArcGIS??
كيفية استخدام أداة إنشاء طبقة تخصيص الموقع ؟؟
Path
to access the toolمسار الوصول الى الأداة
:
Make
Location-Allocation Layer Tool, Analysis Toolset,
Network Analyst Tools Toolbox
Make Location-Allocation Layer
Makes a
location-allocation network analysis layer and sets its analysis properties. A location-allocation
analysis layer is useful for choosing a given number of facilities from a set
of potential locations such that a demand will be allocated to facilities in an
optimal and efficient manner.
يقوم بإنشاء طبقة تحليل شبكة تخصيص الموقع وتعيين خصائص
التحليل الخاصة بها. تعد طبقة تحليل تخصيص الموقع مفيدة لاختيار عدد معين من
المرافق من مجموعة من المواقع المحتملة بحيث يتم تخصيص الطلب للمرافق بطريقة
مثالية وفعالة.
1.
Input Analysis Network شبكة التحليل
المدخلة
The network dataset on
which the location-allocation analysis will be performed.
مجموعة بيانات الشبكة التي سيتم إجراء تحليل تخصيص
الموقع عليها.
Output
Layer Name
Name of the location-allocation network analysis layer to create.
Impedance
Attribute
The cost attribute to be used as impedance in the analysis.
Travel
From (optional)
Specifies the direction of travel between facilities and demand points
when calculating the network costs.
· FACILITY_TO_DEMAND—Direction of travel is from facilities to demand
points. Fire departments commonly use the this setting, since they are
concerned with the time it takes to travel from the fire station to the
location of the emergency.
· DEMAND_TO_FACILITY—Direction of travel is from demand points to
facilities. Retail stores commonly use this setting, since they are concerned
with the time it takes the shoppers to reach the store.
Using this option can affect the allocation of the demand points to the
facilities on a network with one-way restrictions and different impedances
based on direction of travel. For instance, a facility may be a 15-minute drive
from the demand point to the facility, but only a 10-minute trip when traveling
from the facility to the demand point.
Location-Allocation
Problem Type (optional)
The problem type that will be solved. The choice of the problem type
depends on the kind of facility being located. Different kinds of facilities
have different priorities and constraints.
· MINIMIZE_IMPEDANCE—This option solves the warehouse location problem. It
selects a set of facilities such that the total sum of weighted impedances
(demand at a location times the impedance to the closest facility) is
minimized. This problem type is often known as the P-Median problem.
· MAXIMIZE_COVERAGE—This option solves the fire station location problem. It
chooses facilities such that all or the greatest amount of demand is within a
specified impedance cutoff.
· MAXIMIZE_CAPACITATED_COVERAGE—This option solves the location problem
where facilities have a finite capacity. It chooses facilities such that all or
the greatest amount of demand can be served without exceeding the capacity of
any facility. In addition to honoring capacity, it selects facilities such that
the total sum of weighted impedance (demand allocated to a facility multiplied
by the impedance to or from the facility) is minimized.
· MINIMIZE_FACILITIES—This option solves the fire station location problem.
It chooses the minimum number of facilities needed to cover all or the greatest
amount of demand within a specified impedance cutoff.
· MAXIMIZE_ATTENDANCE—This option solves the neighborhood store location
problem where the proportion of demand allocated to the nearest chosen facility
falls with increasing distance. The set of facilities that maximize the total
allocated demand is chosen. Demand further than the specified impedance cutoff
does not affect the chosen set of facilities.
· MAXIMIZE_MARKET_SHARE—This option solves the competitive facility location
problem. It chooses facilities to maximize market share in the presence of
competitive facilities. Gravity model concepts are used to determine the
proportion of demand allocated to each facility. The set of facilities that
maximizes the total allocated demand is chosen.
· TARGET_MARKET_SHARE—This option solves the competitive facility location
problem. It chooses facilities to reach a specified target market share in the
presence of competitive facilities. Gravity model concepts are used to
determine the proportion of demand allocated to each facility. The minimum
number of facilities needed to reach the specified target market share is
chosen.
Number of
Facilities to Find (optional)
Specifies the number of facilities that the solver should locate.
The facilities with a FacilityType value of Required are always part of
the solution when there are more facilities to find than required facilities;
any excess facilities to choose are picked from candidate facilities.
Any facilities that have a FacilityType value of Chosen before solving are
treated as candidate facilities at solve time.
The parameter value is not considered for the Minimize facilities problem
type since the solver determines the minimum number of facilities to locate to
maximize coverage.
The parameter value is overridden for the Target market share problem type
because the solver searches for the minimum number of facilities required to
capture the specified market share.
Impedance
Cutoff (optional)
Impedance Cutoff specifies the maximum impedance at which a demand point
can be allocated to a facility. The maximum impedance is measured by the
least-cost path along the network. If a demand point is outside the cutoff, it
is left unallocated. This property might be used to model the maximum distance
that people are willing to travel to visit your stores or the maximum time that
is permitted for a fire department to reach anyone in the community.
Demand points have a Cutoff_[Impedance] property, which, if set, overrides
the Impedance Cutoff property of the analysis layer. You might find that people
in rural areas are willing to travel up to 10 miles to reach a facility, while
urbanites are only willing to travel up to 2 miles. You can model this behavior
by setting the impedance cutoff value of the analysis layer to 10 and setting
the Cutoff_Miles value of the demand points in urban areas to 2.
Impedance
Transformation (optional)
This sets the equation for transforming the network cost between
facilities and demand points. This property, coupled with the Impedance
Parameter, specifies how severely the network impedance between facilities and
demand points influences the solver's choice of facilities.
· LINEAR—The transformed network impedance between the facility and the
demand point is the same as the shortest-path network impedance between them.
With this option, the impedance parameter is always set to one. This is the
default.
· POWER—The transformed network impedance between the facility and the
demand point is equal to the shortest-path network impedance raised to the
power specified by the impedance parameter. Use this option with a positive
impedance parameter to specify higher weight to nearby facilities.
· EXPONENTIAL —The transformed network impedance between the facility and
the demand point is equal to the mathematical constant e raised to the power
specified by the shortest-path network impedance multiplied with the impedance
parameter. Use this option with a positive impedance parameter to specify a
very high weight to nearby facilities.Exponential transformations are commonly
used in conjunction with an impedance cutoff.
Demand points have an ImpedanceTransformation property, which, if set,
overrides the Impedance Transformation property of the analysis layer. You
might determine the impedance transformation should be different for urban and
rural residents. You can model this by setting the impedance transformation for
the analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Impedance
Parameter (optional)
Provides a parameter value to the equations specified in the Impedance
transformation parameter. The parameter value is ignored when the impedance
transformation is of type Linear. For Power and Exponential impedance
transformations, the value should be nonzero.
Demand points have an ImpedanceParameter property, which, if set,
overrides the Impedance Parameter property of the analysis layer. You might
determine that the impedance parameter should be different for urban and rural
residents. You can model this by setting the impedance transformation for the
analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Target
Market Share (optional)
Specifies the target market share in percentage to solve for when the
Location-Allocation Problem Type parameter is set to Target market share. It is
the percentage of the total demand weight that you want your solution
facilities to capture. The solver chooses the minimum number of facilities
required to capture the target market share specified by this numeric value.
Default
Capacity (optional)
Specifies the default capacity of facilities when the Location-Allocation
Problem Type parameter is set to Maximize capacitated coverage. This parameter
is ignored for all other problem types.
Facilities have a Capacity property, which, if set to a nonnull value,
overrides the Default Capacity parameter for that facility.
Start Time
(optional)
Indicates the time and date of departure. The departure time can be from
facilities or demand points, depending on whether travel is from demand to
facility or facility to demand.
If you have chosen a traffic-based impedance attribute, the solution will
be generated given dynamic traffic conditions at the time of day specified
here. A date and time can be specified as 5/14/2012 10:30 AM.
Instead of using a particular date, a day of the week can be specified
using the following dates:
· Today—12/30/1899
· Sunday—12/31/1899
· Monday—1/1/1900
· Tuesday—1/2/1900
· Wednesday—1/3/1900
· Thursday—1/4/1900
· Friday—1/5/1900
· Saturday—1/6/1900
For example, to specify that
travel should begin at 5:00 p.m. on Tuesday, specify the parameter value as
1/2/1900 5:00 PM.
Accumulators
(optional)
A list of cost attributes to be accumulated during analysis. These
accumulation attributes are purely for reference; the solver only uses the cost
attribute specified by the Impedance Attribute parameter to calculate the
route.
For each cost attribute that is accumulated, a Total_[Impedance] property
is added to the routes that are output by the solver.
Use
Hierarchy in Analysis (optional)
· Checked—Use the hierarchy attribute for the analysis. Using a hierarchy
results in the solver preferring higher-order edges to lower-order edges.
Hierarchical solves are faster, and they can be used to simulate the preference
of a driver who chooses to travel on freeways over local roads when
possible—even if that means a longer trip. This option is enabled only if the
input network dataset has a hierarchy attribute.
· Unchecked—Do not use the hierarchy attribute for the analysis. Not using a
hierarchy yields an exact route for the network dataset.
The parameter is disabled if a hierarchy attribute is not defined on the
network dataset used to perform the analysis.
Output
Path Shape (optional)
· NO_LINES—No shape will be generated for the output of the analysis.
· STRAIGHT_LINES—The output line shapes will be straight lines connecting
the solution facilities to their allocated demand points.
U-Turn
Policy (optional)
The U-Turn policy at junctions. Allowing U-turns implies the solver can
turn around at a junction and double back on the same street. Given that
junctions represent street intersections and dead ends, different vehicles may
be able to turn around at some junctions but not at others—it depends on
whether the junction represents an intersection or dead end. To accommodate
this, the U-turn policy parameter is implicitly specified by how many edges
connect to the junction, which is known as junction valency. The acceptable
values for this parameter are listed below; each is followed by a description
of its meaning in terms of junction valency.
· ALLOW_UTURNS—U-turns are permitted at junctions with any number of
connected edges. This is the default value.
· NO_UTURNS—U-turns are prohibited at all junctions, regardless of junction
valency. Note, however, that U-turns are still permitted at network locations
even when this setting is chosen; however, you can set the individual network
location's CurbApproach property to prohibit U-turns there as well.
· ALLOW_DEAD_ENDS_ONLY—U-turns are prohibited at all junctions, except those
that have only one adjacent edge (a dead end).
· ALLOW_DEAD_ENDS_AND_INTERSECTIONS_ONLY—U-turns are prohibited at junctions
where exactly two adjacent edges meet but are permitted at intersections
(junctions with three or more adjacent edges) and dead ends (junctions with
exactly one adjacent edge). Often, networks have extraneous junctions in the
middle of road segments. This option prevents vehicles from making U-turns at
these locations.
If you need a more precisely defined U-turn policy, consider adding a
global turn delay evaluator to a network cost attribute, or adjusting its
settings if one exists, and pay particular attention to the configuration of
reverse turns. Also, look at setting the CurbApproach property of your network
locations.
Restrictions
(optional)
A list of restriction attributes to apply during the analysis.
2.
Output Layer Name اسم الطبقة
المخرجة
Name of the
location-allocation network analysis layer to create.
اسم طبقة تحليل شبكة تخصيص المواقع المراد
إنشاؤها.
Impedance
Attribute
The cost attribute to be used as impedance in the analysis.
Travel
From (optional)
Specifies the direction of travel between facilities and demand points
when calculating the network costs.
· FACILITY_TO_DEMAND—Direction of travel is from facilities to demand
points. Fire departments commonly use the this setting, since they are
concerned with the time it takes to travel from the fire station to the
location of the emergency.
· DEMAND_TO_FACILITY—Direction of travel is from demand points to
facilities. Retail stores commonly use this setting, since they are concerned
with the time it takes the shoppers to reach the store.
Using this option can affect the allocation of the demand points to the
facilities on a network with one-way restrictions and different impedances
based on direction of travel. For instance, a facility may be a 15-minute drive
from the demand point to the facility, but only a 10-minute trip when traveling
from the facility to the demand point.
Location-Allocation
Problem Type (optional)
The problem type that will be solved. The choice of the problem type
depends on the kind of facility being located. Different kinds of facilities
have different priorities and constraints.
· MINIMIZE_IMPEDANCE—This option solves the warehouse location problem. It
selects a set of facilities such that the total sum of weighted impedances
(demand at a location times the impedance to the closest facility) is
minimized. This problem type is often known as the P-Median problem.
· MAXIMIZE_COVERAGE—This option solves the fire station location problem. It
chooses facilities such that all or the greatest amount of demand is within a
specified impedance cutoff.
· MAXIMIZE_CAPACITATED_COVERAGE—This option solves the location problem
where facilities have a finite capacity. It chooses facilities such that all or
the greatest amount of demand can be served without exceeding the capacity of
any facility. In addition to honoring capacity, it selects facilities such that
the total sum of weighted impedance (demand allocated to a facility multiplied
by the impedance to or from the facility) is minimized.
· MINIMIZE_FACILITIES—This option solves the fire station location problem.
It chooses the minimum number of facilities needed to cover all or the greatest
amount of demand within a specified impedance cutoff.
· MAXIMIZE_ATTENDANCE—This option solves the neighborhood store location
problem where the proportion of demand allocated to the nearest chosen facility
falls with increasing distance. The set of facilities that maximize the total
allocated demand is chosen. Demand further than the specified impedance cutoff
does not affect the chosen set of facilities.
· MAXIMIZE_MARKET_SHARE—This option solves the competitive facility location
problem. It chooses facilities to maximize market share in the presence of
competitive facilities. Gravity model concepts are used to determine the
proportion of demand allocated to each facility. The set of facilities that
maximizes the total allocated demand is chosen.
· TARGET_MARKET_SHARE—This option solves the competitive facility location
problem. It chooses facilities to reach a specified target market share in the
presence of competitive facilities. Gravity model concepts are used to
determine the proportion of demand allocated to each facility. The minimum
number of facilities needed to reach the specified target market share is
chosen.
Number of
Facilities to Find (optional)
Specifies the number of facilities that the solver should locate.
The facilities with a FacilityType value of Required are always part of
the solution when there are more facilities to find than required facilities;
any excess facilities to choose are picked from candidate facilities.
Any facilities that have a FacilityType value of Chosen before solving are
treated as candidate facilities at solve time.
The parameter value is not considered for the Minimize facilities problem
type since the solver determines the minimum number of facilities to locate to
maximize coverage.
The parameter value is overridden for the Target market share problem type
because the solver searches for the minimum number of facilities required to
capture the specified market share.
Impedance
Cutoff (optional)
Impedance Cutoff specifies the maximum impedance at which a demand point
can be allocated to a facility. The maximum impedance is measured by the
least-cost path along the network. If a demand point is outside the cutoff, it
is left unallocated. This property might be used to model the maximum distance
that people are willing to travel to visit your stores or the maximum time that
is permitted for a fire department to reach anyone in the community.
Demand points have a Cutoff_[Impedance] property, which, if set, overrides
the Impedance Cutoff property of the analysis layer. You might find that people
in rural areas are willing to travel up to 10 miles to reach a facility, while
urbanites are only willing to travel up to 2 miles. You can model this behavior
by setting the impedance cutoff value of the analysis layer to 10 and setting
the Cutoff_Miles value of the demand points in urban areas to 2.
Impedance
Transformation (optional)
This sets the equation for transforming the network cost between
facilities and demand points. This property, coupled with the Impedance
Parameter, specifies how severely the network impedance between facilities and
demand points influences the solver's choice of facilities.
· LINEAR—The transformed network impedance between the facility and the
demand point is the same as the shortest-path network impedance between them.
With this option, the impedance parameter is always set to one. This is the
default.
· POWER—The transformed network impedance between the facility and the
demand point is equal to the shortest-path network impedance raised to the
power specified by the impedance parameter. Use this option with a positive
impedance parameter to specify higher weight to nearby facilities.
· EXPONENTIAL —The transformed network impedance between the facility and
the demand point is equal to the mathematical constant e raised to the power
specified by the shortest-path network impedance multiplied with the impedance
parameter. Use this option with a positive impedance parameter to specify a
very high weight to nearby facilities.Exponential transformations are commonly
used in conjunction with an impedance cutoff.
Demand points have an ImpedanceTransformation property, which, if set,
overrides the Impedance Transformation property of the analysis layer. You
might determine the impedance transformation should be different for urban and
rural residents. You can model this by setting the impedance transformation for
the analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Impedance
Parameter (optional)
Provides a parameter value to the equations specified in the Impedance
transformation parameter. The parameter value is ignored when the impedance
transformation is of type Linear. For Power and Exponential impedance
transformations, the value should be nonzero.
Demand points have an ImpedanceParameter property, which, if set,
overrides the Impedance Parameter property of the analysis layer. You might
determine that the impedance parameter should be different for urban and rural
residents. You can model this by setting the impedance transformation for the
analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Target
Market Share (optional)
Specifies the target market share in percentage to solve for when the
Location-Allocation Problem Type parameter is set to Target market share. It is
the percentage of the total demand weight that you want your solution
facilities to capture. The solver chooses the minimum number of facilities
required to capture the target market share specified by this numeric value.
Default
Capacity (optional)
Specifies the default capacity of facilities when the Location-Allocation
Problem Type parameter is set to Maximize capacitated coverage. This parameter
is ignored for all other problem types.
Facilities have a Capacity property, which, if set to a nonnull value,
overrides the Default Capacity parameter for that facility.
Start Time
(optional)
Indicates the time and date of departure. The departure time can be from
facilities or demand points, depending on whether travel is from demand to
facility or facility to demand.
If you have chosen a traffic-based impedance attribute, the solution will
be generated given dynamic traffic conditions at the time of day specified
here. A date and time can be specified as 5/14/2012 10:30 AM.
Instead of using a particular date, a day of the week can be specified
using the following dates:
· Today—12/30/1899
· Sunday—12/31/1899
· Monday—1/1/1900
· Tuesday—1/2/1900
· Wednesday—1/3/1900
· Thursday—1/4/1900
· Friday—1/5/1900
· Saturday—1/6/1900
For example, to specify that
travel should begin at 5:00 p.m. on Tuesday, specify the parameter value as
1/2/1900 5:00 PM.
Accumulators
(optional)
A list of cost attributes to be accumulated during analysis. These
accumulation attributes are purely for reference; the solver only uses the cost
attribute specified by the Impedance Attribute parameter to calculate the
route.
For each cost attribute that is accumulated, a Total_[Impedance] property
is added to the routes that are output by the solver.
Use Hierarchy
in Analysis (optional)
· Checked—Use the hierarchy attribute for the analysis. Using a hierarchy
results in the solver preferring higher-order edges to lower-order edges.
Hierarchical solves are faster, and they can be used to simulate the preference
of a driver who chooses to travel on freeways over local roads when
possible—even if that means a longer trip. This option is enabled only if the
input network dataset has a hierarchy attribute.
· Unchecked—Do not use the hierarchy attribute for the analysis. Not using a
hierarchy yields an exact route for the network dataset.
The parameter is disabled if a hierarchy attribute is not defined on the
network dataset used to perform the analysis.
Output
Path Shape (optional)
· NO_LINES—No shape will be generated for the output of the analysis.
· STRAIGHT_LINES—The output line shapes will be straight lines connecting
the solution facilities to their allocated demand points.
U-Turn
Policy (optional)
The U-Turn policy at junctions. Allowing U-turns implies the solver can
turn around at a junction and double back on the same street. Given that
junctions represent street intersections and dead ends, different vehicles may
be able to turn around at some junctions but not at others—it depends on
whether the junction represents an intersection or dead end. To accommodate
this, the U-turn policy parameter is implicitly specified by how many edges
connect to the junction, which is known as junction valency. The acceptable
values for this parameter are listed below; each is followed by a description
of its meaning in terms of junction valency.
· ALLOW_UTURNS—U-turns are permitted at junctions with any number of
connected edges. This is the default value.
· NO_UTURNS—U-turns are prohibited at all junctions, regardless of junction
valency. Note, however, that U-turns are still permitted at network locations
even when this setting is chosen; however, you can set the individual network
location's CurbApproach property to prohibit U-turns there as well.
· ALLOW_DEAD_ENDS_ONLY—U-turns are prohibited at all junctions, except those
that have only one adjacent edge (a dead end).
· ALLOW_DEAD_ENDS_AND_INTERSECTIONS_ONLY—U-turns are prohibited at junctions
where exactly two adjacent edges meet but are permitted at intersections
(junctions with three or more adjacent edges) and dead ends (junctions with
exactly one adjacent edge). Often, networks have extraneous junctions in the
middle of road segments. This option prevents vehicles from making U-turns at
these locations.
If you need a more precisely defined U-turn policy, consider adding a
global turn delay evaluator to a network cost attribute, or adjusting its
settings if one exists, and pay particular attention to the configuration of
reverse turns. Also, look at setting the CurbApproach property of your network
locations.
Restrictions
(optional)
A list of restriction attributes to apply during the analysis.
3.
Impedance Attribute جدول المعاوقة
The cost attribute to be
used as impedance in the analysis.
جدول التكلفة التي سيتم استخدامها كمعاوقة في
التحليل.
Travel
From (optional)
Specifies the direction of travel between facilities and demand points
when calculating the network costs.
· FACILITY_TO_DEMAND—Direction of travel is from facilities to demand
points. Fire departments commonly use the this setting, since they are
concerned with the time it takes to travel from the fire station to the
location of the emergency.
· DEMAND_TO_FACILITY—Direction of travel is from demand points to
facilities. Retail stores commonly use this setting, since they are concerned
with the time it takes the shoppers to reach the store.
Using this option can affect the allocation of the demand points to the
facilities on a network with one-way restrictions and different impedances
based on direction of travel. For instance, a facility may be a 15-minute drive
from the demand point to the facility, but only a 10-minute trip when traveling
from the facility to the demand point.
Location-Allocation
Problem Type (optional)
The problem type that will be solved. The choice of the problem type
depends on the kind of facility being located. Different kinds of facilities
have different priorities and constraints.
· MINIMIZE_IMPEDANCE—This option solves the warehouse location problem. It
selects a set of facilities such that the total sum of weighted impedances
(demand at a location times the impedance to the closest facility) is
minimized. This problem type is often known as the P-Median problem.
· MAXIMIZE_COVERAGE—This option solves the fire station location problem. It
chooses facilities such that all or the greatest amount of demand is within a
specified impedance cutoff.
· MAXIMIZE_CAPACITATED_COVERAGE—This option solves the location problem
where facilities have a finite capacity. It chooses facilities such that all or
the greatest amount of demand can be served without exceeding the capacity of
any facility. In addition to honoring capacity, it selects facilities such that
the total sum of weighted impedance (demand allocated to a facility multiplied
by the impedance to or from the facility) is minimized.
· MINIMIZE_FACILITIES—This option solves the fire station location problem.
It chooses the minimum number of facilities needed to cover all or the greatest
amount of demand within a specified impedance cutoff.
· MAXIMIZE_ATTENDANCE—This option solves the neighborhood store location
problem where the proportion of demand allocated to the nearest chosen facility
falls with increasing distance. The set of facilities that maximize the total
allocated demand is chosen. Demand further than the specified impedance cutoff
does not affect the chosen set of facilities.
· MAXIMIZE_MARKET_SHARE—This option solves the competitive facility location
problem. It chooses facilities to maximize market share in the presence of
competitive facilities. Gravity model concepts are used to determine the
proportion of demand allocated to each facility. The set of facilities that
maximizes the total allocated demand is chosen.
· TARGET_MARKET_SHARE—This option solves the competitive facility location
problem. It chooses facilities to reach a specified target market share in the
presence of competitive facilities. Gravity model concepts are used to
determine the proportion of demand allocated to each facility. The minimum
number of facilities needed to reach the specified target market share is
chosen.
Number of
Facilities to Find (optional)
Specifies the number of facilities that the solver should locate.
The facilities with a FacilityType value of Required are always part of
the solution when there are more facilities to find than required facilities;
any excess facilities to choose are picked from candidate facilities.
Any facilities that have a FacilityType value of Chosen before solving are
treated as candidate facilities at solve time.
The parameter value is not considered for the Minimize facilities problem
type since the solver determines the minimum number of facilities to locate to
maximize coverage.
The parameter value is overridden for the Target market share problem type
because the solver searches for the minimum number of facilities required to
capture the specified market share.
Impedance
Cutoff (optional)
Impedance Cutoff specifies the maximum impedance at which a demand point
can be allocated to a facility. The maximum impedance is measured by the
least-cost path along the network. If a demand point is outside the cutoff, it
is left unallocated. This property might be used to model the maximum distance
that people are willing to travel to visit your stores or the maximum time that
is permitted for a fire department to reach anyone in the community.
Demand points have a Cutoff_[Impedance] property, which, if set, overrides
the Impedance Cutoff property of the analysis layer. You might find that people
in rural areas are willing to travel up to 10 miles to reach a facility, while
urbanites are only willing to travel up to 2 miles. You can model this behavior
by setting the impedance cutoff value of the analysis layer to 10 and setting
the Cutoff_Miles value of the demand points in urban areas to 2.
Impedance
Transformation (optional)
This sets the equation for transforming the network cost between
facilities and demand points. This property, coupled with the Impedance
Parameter, specifies how severely the network impedance between facilities and
demand points influences the solver's choice of facilities.
· LINEAR—The transformed network impedance between the facility and the
demand point is the same as the shortest-path network impedance between them.
With this option, the impedance parameter is always set to one. This is the
default.
· POWER—The transformed network impedance between the facility and the
demand point is equal to the shortest-path network impedance raised to the
power specified by the impedance parameter. Use this option with a positive
impedance parameter to specify higher weight to nearby facilities.
· EXPONENTIAL —The transformed network impedance between the facility and
the demand point is equal to the mathematical constant e raised to the power
specified by the shortest-path network impedance multiplied with the impedance
parameter. Use this option with a positive impedance parameter to specify a
very high weight to nearby facilities.Exponential transformations are commonly
used in conjunction with an impedance cutoff.
Demand points have an ImpedanceTransformation property, which, if set,
overrides the Impedance Transformation property of the analysis layer. You
might determine the impedance transformation should be different for urban and
rural residents. You can model this by setting the impedance transformation for
the analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Impedance
Parameter (optional)
Provides a parameter value to the equations specified in the Impedance
transformation parameter. The parameter value is ignored when the impedance
transformation is of type Linear. For Power and Exponential impedance
transformations, the value should be nonzero.
Demand points have an ImpedanceParameter property, which, if set,
overrides the Impedance Parameter property of the analysis layer. You might
determine that the impedance parameter should be different for urban and rural
residents. You can model this by setting the impedance transformation for the
analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Target
Market Share (optional)
Specifies the target market share in percentage to solve for when the Location-Allocation
Problem Type parameter is set to Target market share. It is the percentage of
the total demand weight that you want your solution facilities to capture. The
solver chooses the minimum number of facilities required to capture the target market
share specified by this numeric value.
Default
Capacity (optional)
Specifies the default capacity of facilities when the Location-Allocation
Problem Type parameter is set to Maximize capacitated coverage. This parameter
is ignored for all other problem types.
Facilities have a Capacity property, which, if set to a nonnull value,
overrides the Default Capacity parameter for that facility.
Start Time
(optional)
Indicates the time and date of departure. The departure time can be from
facilities or demand points, depending on whether travel is from demand to
facility or facility to demand.
If you have chosen a traffic-based impedance attribute, the solution will
be generated given dynamic traffic conditions at the time of day specified
here. A date and time can be specified as 5/14/2012 10:30 AM.
Instead of using a particular date, a day of the week can be specified
using the following dates:
· Today—12/30/1899
· Sunday—12/31/1899
· Monday—1/1/1900
· Tuesday—1/2/1900
· Wednesday—1/3/1900
· Thursday—1/4/1900
· Friday—1/5/1900
· Saturday—1/6/1900
For example, to specify that
travel should begin at 5:00 p.m. on Tuesday, specify the parameter value as
1/2/1900 5:00 PM.
Accumulators
(optional)
A list of cost attributes to be accumulated during analysis. These accumulation
attributes are purely for reference; the solver only uses the cost attribute
specified by the Impedance Attribute parameter to calculate the route.
For each cost attribute that is accumulated, a Total_[Impedance] property
is added to the routes that are output by the solver.
Use
Hierarchy in Analysis (optional)
· Checked—Use the hierarchy attribute for the analysis. Using a hierarchy
results in the solver preferring higher-order edges to lower-order edges.
Hierarchical solves are faster, and they can be used to simulate the preference
of a driver who chooses to travel on freeways over local roads when
possible—even if that means a longer trip. This option is enabled only if the
input network dataset has a hierarchy attribute.
· Unchecked—Do not use the hierarchy attribute for the analysis. Not using a
hierarchy yields an exact route for the network dataset.
The parameter is disabled if a hierarchy attribute is not defined on the
network dataset used to perform the analysis.
Output
Path Shape (optional)
· NO_LINES—No shape will be generated for the output of the analysis.
· STRAIGHT_LINES—The output line shapes will be straight lines connecting
the solution facilities to their allocated demand points.
U-Turn
Policy (optional)
The U-Turn policy at junctions. Allowing U-turns implies the solver can
turn around at a junction and double back on the same street. Given that
junctions represent street intersections and dead ends, different vehicles may
be able to turn around at some junctions but not at others—it depends on
whether the junction represents an intersection or dead end. To accommodate
this, the U-turn policy parameter is implicitly specified by how many edges
connect to the junction, which is known as junction valency. The acceptable values
for this parameter are listed below; each is followed by a description of its
meaning in terms of junction valency.
· ALLOW_UTURNS—U-turns are permitted at junctions with any number of
connected edges. This is the default value.
· NO_UTURNS—U-turns are prohibited at all junctions, regardless of junction
valency. Note, however, that U-turns are still permitted at network locations
even when this setting is chosen; however, you can set the individual network
location's CurbApproach property to prohibit U-turns there as well.
· ALLOW_DEAD_ENDS_ONLY—U-turns are prohibited at all junctions, except those
that have only one adjacent edge (a dead end).
· ALLOW_DEAD_ENDS_AND_INTERSECTIONS_ONLY—U-turns are prohibited at junctions
where exactly two adjacent edges meet but are permitted at intersections
(junctions with three or more adjacent edges) and dead ends (junctions with
exactly one adjacent edge). Often, networks have extraneous junctions in the
middle of road segments. This option prevents vehicles from making U-turns at
these locations.
If you need a more precisely defined U-turn policy, consider adding a
global turn delay evaluator to a network cost attribute, or adjusting its
settings if one exists, and pay particular attention to the configuration of
reverse turns. Also, look at setting the CurbApproach property of your network
locations.
Restrictions
(optional)
A list of restriction attributes to apply during the analysis.
4.
Travel From (optional) السفر من
(اختياري)
Specifies the direction
of travel between facilities and demand points when calculating the network
costs.
يحدد اتجاه السفر بين المرافق ونقاط الطلب عند
حساب تكاليف الشبكة.
• FACILITY_TO_DEMAND - اتجاه السفر من المرافق إلى نقاط الطلب. تستخدم أقسام الإطفاء
عادةً هذا الإعداد ، نظرًا لأنها معنية بالوقت المستغرق للانتقال من محطة الإطفاء
إلى موقع الطوارئ.
• DEMAND_TO_FACILITY - اتجاه السفر من نقاط الطلب إلى المرافق. تستخدم متاجر البيع
بالتجزئة عادةً هذا الإعداد ، نظرًا لأنها معنية بالوقت الذي يستغرقه المتسوقون
للوصول إلى المتجر.
يمكن أن يؤثر استخدام هذا الخيار على تخصيص نقاط
الطلب للمرافق الموجودة على شبكة ذات قيود أحادية الاتجاه ومعاقات مختلفة بناءً
على اتجاه السفر. على سبيل المثال ، قد تكون المنشأة على بعد 15 دقيقة بالسيارة من
نقطة الطلب إلى المنشأة ، ولكن تستغرق الرحلة 10 دقائق فقط عند السفر من المنشأة
إلى نقطة الطلب.
Location-Allocation
Problem Type (optional)
The problem type that will be solved. The choice of the problem type
depends on the kind of facility being located. Different kinds of facilities
have different priorities and constraints.
· MINIMIZE_IMPEDANCE—This option solves the warehouse location problem. It
selects a set of facilities such that the total sum of weighted impedances
(demand at a location times the impedance to the closest facility) is
minimized. This problem type is often known as the P-Median problem.
· MAXIMIZE_COVERAGE—This option solves the fire station location problem. It
chooses facilities such that all or the greatest amount of demand is within a
specified impedance cutoff.
· MAXIMIZE_CAPACITATED_COVERAGE—This option solves the location problem
where facilities have a finite capacity. It chooses facilities such that all or
the greatest amount of demand can be served without exceeding the capacity of
any facility. In addition to honoring capacity, it selects facilities such that
the total sum of weighted impedance (demand allocated to a facility multiplied
by the impedance to or from the facility) is minimized.
· MINIMIZE_FACILITIES—This option solves the fire station location problem.
It chooses the minimum number of facilities needed to cover all or the greatest
amount of demand within a specified impedance cutoff.
· MAXIMIZE_ATTENDANCE—This option solves the neighborhood store location
problem where the proportion of demand allocated to the nearest chosen facility
falls with increasing distance. The set of facilities that maximize the total
allocated demand is chosen. Demand further than the specified impedance cutoff
does not affect the chosen set of facilities.
· MAXIMIZE_MARKET_SHARE—This option solves the competitive facility location
problem. It chooses facilities to maximize market share in the presence of
competitive facilities. Gravity model concepts are used to determine the
proportion of demand allocated to each facility. The set of facilities that
maximizes the total allocated demand is chosen.
· TARGET_MARKET_SHARE—This option solves the competitive facility location
problem. It chooses facilities to reach a specified target market share in the
presence of competitive facilities. Gravity model concepts are used to
determine the proportion of demand allocated to each facility. The minimum
number of facilities needed to reach the specified target market share is
chosen.
Number of
Facilities to Find (optional)
Specifies the number of facilities that the solver should locate.
The facilities with a FacilityType value of Required are always part of
the solution when there are more facilities to find than required facilities;
any excess facilities to choose are picked from candidate facilities.
Any facilities that have a FacilityType value of Chosen before solving are
treated as candidate facilities at solve time.
The parameter value is not considered for the Minimize facilities problem
type since the solver determines the minimum number of facilities to locate to
maximize coverage.
The parameter value is overridden for the Target market share problem type
because the solver searches for the minimum number of facilities required to
capture the specified market share.
Impedance
Cutoff (optional)
Impedance Cutoff specifies the maximum impedance at which a demand point
can be allocated to a facility. The maximum impedance is measured by the
least-cost path along the network. If a demand point is outside the cutoff, it
is left unallocated. This property might be used to model the maximum distance
that people are willing to travel to visit your stores or the maximum time that
is permitted for a fire department to reach anyone in the community.
Demand points have a Cutoff_[Impedance] property, which, if set, overrides
the Impedance Cutoff property of the analysis layer. You might find that people
in rural areas are willing to travel up to 10 miles to reach a facility, while
urbanites are only willing to travel up to 2 miles. You can model this behavior
by setting the impedance cutoff value of the analysis layer to 10 and setting
the Cutoff_Miles value of the demand points in urban areas to 2.
Impedance
Transformation (optional)
This sets the equation for transforming the network cost between
facilities and demand points. This property, coupled with the Impedance
Parameter, specifies how severely the network impedance between facilities and
demand points influences the solver's choice of facilities.
· LINEAR—The transformed network impedance between the facility and the
demand point is the same as the shortest-path network impedance between them.
With this option, the impedance parameter is always set to one. This is the
default.
· POWER—The transformed network impedance between the facility and the
demand point is equal to the shortest-path network impedance raised to the
power specified by the impedance parameter. Use this option with a positive
impedance parameter to specify higher weight to nearby facilities.
· EXPONENTIAL —The transformed network impedance between the facility and
the demand point is equal to the mathematical constant e raised to the power
specified by the shortest-path network impedance multiplied with the impedance
parameter. Use this option with a positive impedance parameter to specify a
very high weight to nearby facilities.Exponential transformations are commonly
used in conjunction with an impedance cutoff.
Demand points have an ImpedanceTransformation property, which, if set,
overrides the Impedance Transformation property of the analysis layer. You
might determine the impedance transformation should be different for urban and
rural residents. You can model this by setting the impedance transformation for
the analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Impedance
Parameter (optional)
Provides a parameter value to the equations specified in the Impedance
transformation parameter. The parameter value is ignored when the impedance
transformation is of type Linear. For Power and Exponential impedance
transformations, the value should be nonzero.
Demand points have an ImpedanceParameter property, which, if set,
overrides the Impedance Parameter property of the analysis layer. You might
determine that the impedance parameter should be different for urban and rural
residents. You can model this by setting the impedance transformation for the
analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Target
Market Share (optional)
Specifies the target market share in percentage to solve for when the
Location-Allocation Problem Type parameter is set to Target market share. It is
the percentage of the total demand weight that you want your solution
facilities to capture. The solver chooses the minimum number of facilities
required to capture the target market share specified by this numeric value.
Default
Capacity (optional)
Specifies the default capacity of facilities when the Location-Allocation
Problem Type parameter is set to Maximize capacitated coverage. This parameter
is ignored for all other problem types.
Facilities have a Capacity property, which, if set to a nonnull value,
overrides the Default Capacity parameter for that facility.
Start Time
(optional)
Indicates the time and date of departure. The departure time can be from
facilities or demand points, depending on whether travel is from demand to
facility or facility to demand.
If you have chosen a traffic-based impedance attribute, the solution will
be generated given dynamic traffic conditions at the time of day specified
here. A date and time can be specified as 5/14/2012 10:30 AM.
Instead of using a particular date, a day of the week can be specified
using the following dates:
· Today—12/30/1899
· Sunday—12/31/1899
· Monday—1/1/1900
· Tuesday—1/2/1900
· Wednesday—1/3/1900
· Thursday—1/4/1900
· Friday—1/5/1900
· Saturday—1/6/1900
For example, to specify that
travel should begin at 5:00 p.m. on Tuesday, specify the parameter value as
1/2/1900 5:00 PM.
Accumulators
(optional)
A list of cost attributes to be accumulated during analysis. These
accumulation attributes are purely for reference; the solver only uses the cost
attribute specified by the Impedance Attribute parameter to calculate the
route.
For each cost attribute that is accumulated, a Total_[Impedance] property
is added to the routes that are output by the solver.
Use
Hierarchy in Analysis (optional)
· Checked—Use the hierarchy attribute for the analysis. Using a hierarchy
results in the solver preferring higher-order edges to lower-order edges.
Hierarchical solves are faster, and they can be used to simulate the preference
of a driver who chooses to travel on freeways over local roads when
possible—even if that means a longer trip. This option is enabled only if the
input network dataset has a hierarchy attribute.
· Unchecked—Do not use the hierarchy attribute for the analysis. Not using a
hierarchy yields an exact route for the network dataset.
The parameter is disabled if a hierarchy attribute is not defined on the
network dataset used to perform the analysis.
Output
Path Shape (optional)
· NO_LINES—No shape will be generated for the output of the analysis.
· STRAIGHT_LINES—The output line shapes will be straight lines connecting
the solution facilities to their allocated demand points.
U-Turn
Policy (optional)
The U-Turn policy at junctions. Allowing U-turns implies the solver can
turn around at a junction and double back on the same street. Given that
junctions represent street intersections and dead ends, different vehicles may
be able to turn around at some junctions but not at others—it depends on
whether the junction represents an intersection or dead end. To accommodate
this, the U-turn policy parameter is implicitly specified by how many edges
connect to the junction, which is known as junction valency. The acceptable
values for this parameter are listed below; each is followed by a description
of its meaning in terms of junction valency.
· ALLOW_UTURNS—U-turns are permitted at junctions with any number of
connected edges. This is the default value.
· NO_UTURNS—U-turns are prohibited at all junctions, regardless of junction
valency. Note, however, that U-turns are still permitted at network locations
even when this setting is chosen; however, you can set the individual network
location's CurbApproach property to prohibit U-turns there as well.
· ALLOW_DEAD_ENDS_ONLY—U-turns are prohibited at all junctions, except those
that have only one adjacent edge (a dead end).
· ALLOW_DEAD_ENDS_AND_INTERSECTIONS_ONLY—U-turns are prohibited at junctions
where exactly two adjacent edges meet but are permitted at intersections
(junctions with three or more adjacent edges) and dead ends (junctions with
exactly one adjacent edge). Often, networks have extraneous junctions in the
middle of road segments. This option prevents vehicles from making U-turns at
these locations.
If you need a more precisely defined U-turn policy, consider adding a
global turn delay evaluator to a network cost attribute, or adjusting its
settings if one exists, and pay particular attention to the configuration of
reverse turns. Also, look at setting the CurbApproach property of your network
locations.
Restrictions
(optional)
A list of restriction attributes to apply during the analysis.
5.
Location-Allocation Problem Type (optional) نوع مشكلة تخصيص الموقع (اختياري)
The problem type that
will be solved. The choice of the problem type depends on the kind of facility
being located. Different kinds of facilities have different priorities and
constraints.
نوع المشكلة التي سيتم حلها. يعتمد اختيار نوع
المشكلة على نوع المنشأة الموجودة. أنواع مختلفة من المرافق لها أولويات وقيود
مختلفة.
• MINIMIZE_IMPEDANCE - يحل هذا الخيار مشكلة موقع المستودع. يختار مجموعة من التسهيلات
بحيث يتم تقليل المجموع الإجمالي للممانعات الموزونة (الطلب في موقع مرات مقاومة
أقرب منشأة). غالبًا ما يُعرف هذا النوع من المشكلات بمشكلة P-Median.
• MAXIMIZE_COVERAGE - يحل هذا الخيار مشكلة موقع محطة الإطفاء. يختار التسهيلات بحيث
يكون كل أو أكبر قدر من الطلب ضمن قطع مقاومة محدد.
• MAXIMIZE_CAPACITATED_COVERAGE - يحل هذا الخيار مشكلة
الموقع حيث يكون للمرافق سعة محدودة. يختار التسهيلات بحيث يمكن تقديم كل أو أكبر
قدر من الطلب دون تجاوز قدرة أي منشأة. بالإضافة إلى تكريم السعة ، فإنه يختار
المرافق بحيث يتم تقليل المبلغ الإجمالي للمقاومة الموزونة (الطلب المخصص لمنشأة
مضروبًا في المعاوقة إلى أو من المنشأة).
• MINIMIZE_FACILITIES - يحل هذا الخيار مشكلة موقع محطة الإطفاء. يختار الحد الأدنى
لعدد التسهيلات اللازمة لتغطية كل أو أكبر قدر من الطلب ضمن قطع مقاومة محدد.
• MAXIMIZE_ATTENDANCE - يحل هذا الخيار مشكلة موقع المتجر المجاور حيث تنخفض نسبة الطلب
المخصصة لأقرب منشأة مختارة مع زيادة المسافة. يتم اختيار مجموعة المرافق التي
تزيد من إجمالي الطلب المخصص. لا يؤثر الطلب أكثر من قطع المعاوقة المحدد على
مجموعة التسهيلات المختارة.
• MAXIMIZE_MARKET_SHARE - يحل هذا الخيار مشكلة موقع المنشأة التنافسية. تختار المرافق
لزيادة حصتها في السوق في وجود مرافق تنافسية. تُستخدم مفاهيم نموذج الجاذبية
لتحديد نسبة الطلب المخصصة لكل منشأة. يتم اختيار مجموعة التسهيلات التي تزيد من
إجمالي الطلب المخصص.
• TARGET_MARKET_SHARE - يحل هذا الخيار مشكلة موقع المنشأة التنافسية. يختار التسهيلات
للوصول إلى حصة سوقية مستهدفة محددة في ظل وجود مرافق تنافسية. تُستخدم مفاهيم
نموذج الجاذبية لتحديد نسبة الطلب المخصصة لكل منشأة. يتم اختيار الحد الأدنى لعدد
التسهيلات اللازمة للوصول إلى حصة السوق المستهدفة المحددة.
Number of
Facilities to Find (optional)
Specifies the number of facilities that the solver should locate.
The facilities with a FacilityType value of Required are always part of
the solution when there are more facilities to find than required facilities;
any excess facilities to choose are picked from candidate facilities.
Any facilities that have a FacilityType value of Chosen before solving are
treated as candidate facilities at solve time.
The parameter value is not considered for the Minimize facilities problem
type since the solver determines the minimum number of facilities to locate to
maximize coverage.
The parameter value is overridden for the Target market share problem type
because the solver searches for the minimum number of facilities required to
capture the specified market share.
Impedance
Cutoff (optional)
Impedance Cutoff specifies the maximum impedance at which a demand point
can be allocated to a facility. The maximum impedance is measured by the
least-cost path along the network. If a demand point is outside the cutoff, it
is left unallocated. This property might be used to model the maximum distance
that people are willing to travel to visit your stores or the maximum time that
is permitted for a fire department to reach anyone in the community.
Demand points have a Cutoff_[Impedance] property, which, if set, overrides
the Impedance Cutoff property of the analysis layer. You might find that people
in rural areas are willing to travel up to 10 miles to reach a facility, while
urbanites are only willing to travel up to 2 miles. You can model this behavior
by setting the impedance cutoff value of the analysis layer to 10 and setting
the Cutoff_Miles value of the demand points in urban areas to 2.
Impedance
Transformation (optional)
This sets the equation for transforming the network cost between
facilities and demand points. This property, coupled with the Impedance
Parameter, specifies how severely the network impedance between facilities and
demand points influences the solver's choice of facilities.
· LINEAR—The transformed network impedance between the facility and the
demand point is the same as the shortest-path network impedance between them.
With this option, the impedance parameter is always set to one. This is the
default.
· POWER—The transformed network impedance between the facility and the
demand point is equal to the shortest-path network impedance raised to the
power specified by the impedance parameter. Use this option with a positive
impedance parameter to specify higher weight to nearby facilities.
· EXPONENTIAL —The transformed network impedance between the facility and
the demand point is equal to the mathematical constant e raised to the power
specified by the shortest-path network impedance multiplied with the impedance
parameter. Use this option with a positive impedance parameter to specify a
very high weight to nearby facilities.Exponential transformations are commonly
used in conjunction with an impedance cutoff.
Demand points have an ImpedanceTransformation property, which, if set,
overrides the Impedance Transformation property of the analysis layer. You might
determine the impedance transformation should be different for urban and rural
residents. You can model this by setting the impedance transformation for the
analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Impedance
Parameter (optional)
Provides a parameter value to the equations specified in the Impedance
transformation parameter. The parameter value is ignored when the impedance transformation
is of type Linear. For Power and Exponential impedance transformations, the
value should be nonzero.
Demand points have an ImpedanceParameter property, which, if set,
overrides the Impedance Parameter property of the analysis layer. You might
determine that the impedance parameter should be different for urban and rural
residents. You can model this by setting the impedance transformation for the
analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Target
Market Share (optional)
Specifies the target market share in percentage to solve for when the
Location-Allocation Problem Type parameter is set to Target market share. It is
the percentage of the total demand weight that you want your solution
facilities to capture. The solver chooses the minimum number of facilities
required to capture the target market share specified by this numeric value.
Default
Capacity (optional)
Specifies the default capacity of facilities when the Location-Allocation
Problem Type parameter is set to Maximize capacitated coverage. This parameter
is ignored for all other problem types.
Facilities have a Capacity property, which, if set to a nonnull value,
overrides the Default Capacity parameter for that facility.
Start Time
(optional)
Indicates the time and date of departure. The departure time can be from
facilities or demand points, depending on whether travel is from demand to
facility or facility to demand.
If you have chosen a traffic-based impedance attribute, the solution will
be generated given dynamic traffic conditions at the time of day specified
here. A date and time can be specified as 5/14/2012 10:30 AM.
Instead of using a particular date, a day of the week can be specified
using the following dates:
· Today—12/30/1899
· Sunday—12/31/1899
· Monday—1/1/1900
· Tuesday—1/2/1900
· Wednesday—1/3/1900
· Thursday—1/4/1900
· Friday—1/5/1900
· Saturday—1/6/1900
For example, to specify that
travel should begin at 5:00 p.m. on Tuesday, specify the parameter value as
1/2/1900 5:00 PM.
Accumulators
(optional)
A list of cost attributes to be accumulated during analysis. These
accumulation attributes are purely for reference; the solver only uses the cost
attribute specified by the Impedance Attribute parameter to calculate the
route.
For each cost attribute that is accumulated, a Total_[Impedance] property
is added to the routes that are output by the solver.
Use Hierarchy
in Analysis (optional)
· Checked—Use the hierarchy attribute for the analysis. Using a hierarchy
results in the solver preferring higher-order edges to lower-order edges.
Hierarchical solves are faster, and they can be used to simulate the preference
of a driver who chooses to travel on freeways over local roads when
possible—even if that means a longer trip. This option is enabled only if the
input network dataset has a hierarchy attribute.
· Unchecked—Do not use the hierarchy attribute for the analysis. Not using a
hierarchy yields an exact route for the network dataset.
The parameter is disabled if a hierarchy attribute is not defined on the
network dataset used to perform the analysis.
Output
Path Shape (optional)
· NO_LINES—No shape will be generated for the output of the analysis.
· STRAIGHT_LINES—The output line shapes will be straight lines connecting
the solution facilities to their allocated demand points.
U-Turn
Policy (optional)
The U-Turn policy at junctions. Allowing U-turns implies the solver can
turn around at a junction and double back on the same street. Given that
junctions represent street intersections and dead ends, different vehicles may
be able to turn around at some junctions but not at others—it depends on
whether the junction represents an intersection or dead end. To accommodate
this, the U-turn policy parameter is implicitly specified by how many edges
connect to the junction, which is known as junction valency. The acceptable
values for this parameter are listed below; each is followed by a description
of its meaning in terms of junction valency.
· ALLOW_UTURNS—U-turns are permitted at junctions with any number of
connected edges. This is the default value.
· NO_UTURNS—U-turns are prohibited at all junctions, regardless of junction
valency. Note, however, that U-turns are still permitted at network locations
even when this setting is chosen; however, you can set the individual network
location's CurbApproach property to prohibit U-turns there as well.
· ALLOW_DEAD_ENDS_ONLY—U-turns are prohibited at all junctions, except those
that have only one adjacent edge (a dead end).
· ALLOW_DEAD_ENDS_AND_INTERSECTIONS_ONLY—U-turns are prohibited at junctions
where exactly two adjacent edges meet but are permitted at intersections
(junctions with three or more adjacent edges) and dead ends (junctions with
exactly one adjacent edge). Often, networks have extraneous junctions in the
middle of road segments. This option prevents vehicles from making U-turns at
these locations.
If you need a more precisely defined U-turn policy, consider adding a
global turn delay evaluator to a network cost attribute, or adjusting its
settings if one exists, and pay particular attention to the configuration of
reverse turns. Also, look at setting the CurbApproach property of your network
locations.
Restrictions
(optional)
A list of restriction attributes to apply during the analysis.
6.
Number of Facilities to Find (optional) عدد المرافق للبحث (اختياري)
Specifies the number of
facilities that the solver should locate.
يحدد عدد التسهيلات التي يجب على المحلل تحديد
موقعها.
دائمًا ما تكون المرافق التي تحتوي على قيمة
"نوع" التسهيلات "مطلوبة جزءًا من الحل عندما يكون هناك المزيد من
التسهيلات التي يمكن العثور عليها أكثر من المرافق المطلوبة ؛ يتم اختيار أي مرافق
فائضة للاختيار من المرافق المرشحة.
يتم التعامل مع أي منشآت تحتوي على قيمة
"نوع" التسهيلات "المختارة" قبل الحل على أنها منشآت مرشحة في
وقت الحل.
لا يتم أخذ قيمة المعلمة في الاعتبار لنوع مشكلة
تصغير المرافق نظرًا لأن المحلل يحدد الحد الأدنى لعدد المرافق لتحديد موقعها
لزيادة التغطية إلى الحد الأقصى.
تم تجاوز قيمة المعلمة لنوع مشكلة حصة السوق
المستهدفة لأن المحلل يبحث عن الحد الأدنى لعدد التسهيلات المطلوبة لالتقاط حصة
السوق المحددة.
Impedance
Cutoff (optional)
Impedance Cutoff specifies the maximum impedance at which a demand point
can be allocated to a facility. The maximum impedance is measured by the
least-cost path along the network. If a demand point is outside the cutoff, it
is left unallocated. This property might be used to model the maximum distance
that people are willing to travel to visit your stores or the maximum time that
is permitted for a fire department to reach anyone in the community.
Demand points have a Cutoff_[Impedance] property, which, if set, overrides
the Impedance Cutoff property of the analysis layer. You might find that people
in rural areas are willing to travel up to 10 miles to reach a facility, while
urbanites are only willing to travel up to 2 miles. You can model this behavior
by setting the impedance cutoff value of the analysis layer to 10 and setting
the Cutoff_Miles value of the demand points in urban areas to 2.
Impedance
Transformation (optional)
This sets the equation for transforming the network cost between
facilities and demand points. This property, coupled with the Impedance
Parameter, specifies how severely the network impedance between facilities and
demand points influences the solver's choice of facilities.
· LINEAR—The transformed network impedance between the facility and the
demand point is the same as the shortest-path network impedance between them.
With this option, the impedance parameter is always set to one. This is the
default.
· POWER—The transformed network impedance between the facility and the
demand point is equal to the shortest-path network impedance raised to the
power specified by the impedance parameter. Use this option with a positive
impedance parameter to specify higher weight to nearby facilities.
· EXPONENTIAL —The transformed network impedance between the facility and
the demand point is equal to the mathematical constant e raised to the power
specified by the shortest-path network impedance multiplied with the impedance
parameter. Use this option with a positive impedance parameter to specify a
very high weight to nearby facilities.Exponential transformations are commonly
used in conjunction with an impedance cutoff.
Demand points have an ImpedanceTransformation property, which, if set,
overrides the Impedance Transformation property of the analysis layer. You
might determine the impedance transformation should be different for urban and
rural residents. You can model this by setting the impedance transformation for
the analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Impedance
Parameter (optional)
Provides a parameter value to the equations specified in the Impedance
transformation parameter. The parameter value is ignored when the impedance
transformation is of type Linear. For Power and Exponential impedance
transformations, the value should be nonzero.
Demand points have an ImpedanceParameter property, which, if set,
overrides the Impedance Parameter property of the analysis layer. You might
determine that the impedance parameter should be different for urban and rural
residents. You can model this by setting the impedance transformation for the
analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Target
Market Share (optional)
Specifies the target market share in percentage to solve for when the
Location-Allocation Problem Type parameter is set to Target market share. It is
the percentage of the total demand weight that you want your solution
facilities to capture. The solver chooses the minimum number of facilities
required to capture the target market share specified by this numeric value.
Default
Capacity (optional)
Specifies the default capacity of facilities when the Location-Allocation
Problem Type parameter is set to Maximize capacitated coverage. This parameter
is ignored for all other problem types.
Facilities have a Capacity property, which, if set to a nonnull value,
overrides the Default Capacity parameter for that facility.
Start Time
(optional)
Indicates the time and date of departure. The departure time can be from
facilities or demand points, depending on whether travel is from demand to
facility or facility to demand.
If you have chosen a traffic-based impedance attribute, the solution will
be generated given dynamic traffic conditions at the time of day specified
here. A date and time can be specified as 5/14/2012 10:30 AM.
Instead of using a particular date, a day of the week can be specified
using the following dates:
· Today—12/30/1899
· Sunday—12/31/1899
· Monday—1/1/1900
· Tuesday—1/2/1900
· Wednesday—1/3/1900
· Thursday—1/4/1900
· Friday—1/5/1900
· Saturday—1/6/1900
For example, to specify that
travel should begin at 5:00 p.m. on Tuesday, specify the parameter value as 1/2/1900
5:00 PM.
Accumulators
(optional)
A list of cost attributes to be accumulated during analysis. These
accumulation attributes are purely for reference; the solver only uses the cost
attribute specified by the Impedance Attribute parameter to calculate the
route.
For each cost attribute that is accumulated, a Total_[Impedance] property
is added to the routes that are output by the solver.
Use
Hierarchy in Analysis (optional)
· Checked—Use the hierarchy attribute for the analysis. Using a hierarchy
results in the solver preferring higher-order edges to lower-order edges.
Hierarchical solves are faster, and they can be used to simulate the preference
of a driver who chooses to travel on freeways over local roads when
possible—even if that means a longer trip. This option is enabled only if the
input network dataset has a hierarchy attribute.
· Unchecked—Do not use the hierarchy attribute for the analysis. Not using a
hierarchy yields an exact route for the network dataset.
The parameter is disabled if a hierarchy attribute is not defined on the
network dataset used to perform the analysis.
Output
Path Shape (optional)
· NO_LINES—No shape will be generated for the output of the analysis.
· STRAIGHT_LINES—The output line shapes will be straight lines connecting
the solution facilities to their allocated demand points.
U-Turn
Policy (optional)
The U-Turn policy at junctions. Allowing U-turns implies the solver can
turn around at a junction and double back on the same street. Given that
junctions represent street intersections and dead ends, different vehicles may
be able to turn around at some junctions but not at others—it depends on
whether the junction represents an intersection or dead end. To accommodate
this, the U-turn policy parameter is implicitly specified by how many edges
connect to the junction, which is known as junction valency. The acceptable
values for this parameter are listed below; each is followed by a description
of its meaning in terms of junction valency.
· ALLOW_UTURNS—U-turns are permitted at junctions with any number of
connected edges. This is the default value.
· NO_UTURNS—U-turns are prohibited at all junctions, regardless of junction
valency. Note, however, that U-turns are still permitted at network locations
even when this setting is chosen; however, you can set the individual network
location's CurbApproach property to prohibit U-turns there as well.
· ALLOW_DEAD_ENDS_ONLY—U-turns are prohibited at all junctions, except those
that have only one adjacent edge (a dead end).
· ALLOW_DEAD_ENDS_AND_INTERSECTIONS_ONLY—U-turns are prohibited at junctions
where exactly two adjacent edges meet but are permitted at intersections
(junctions with three or more adjacent edges) and dead ends (junctions with
exactly one adjacent edge). Often, networks have extraneous junctions in the
middle of road segments. This option prevents vehicles from making U-turns at
these locations.
If you need a more precisely defined U-turn policy, consider adding a
global turn delay evaluator to a network cost attribute, or adjusting its
settings if one exists, and pay particular attention to the configuration of
reverse turns. Also, look at setting the CurbApproach property of your network
locations.
Restrictions
(optional)
A list of restriction attributes to apply during the analysis.
7.
Impedance Cutoff (optional) قطع
المعاوقة (اختياري)
يحدد قطع المعاوقة أقصى مقاومة يمكن عندها تخصيص
نقطة طلب لمنشأة. يتم قياس أقصى مقاومة بواسطة المسار الأقل تكلفة على طول الشبكة.
إذا كانت نقطة الطلب خارج الحد الأقصى ، يتم تركها غير مخصصة. يمكن استخدام هذه
المنشأة لنمذجة أقصى مسافة يرغب الأشخاص في قطعها لزيارة متاجرك أو الحد الأقصى
للوقت المسموح به لقسم مكافحة الحرائق للوصول إلى أي شخص في المجتمع.
تحتوي نقاط الطلب على خاصية Cutoff_ [Impedance] ، والتي ، إذا تم تعيينها ، تتجاوز خاصية Impedance Cutoff لطبقة التحليل. قد تجد أن الناس في المناطق الريفية على استعداد
للسفر لمسافة تصل إلى 10 أميال للوصول إلى منشأة ، في حين أن سكان المدن على
استعداد للسفر لمسافة تصل إلى ميلين فقط. يمكنك نمذجة هذا السلوك عن طريق تعيين قيمة
قطع المعاوقة لطبقة التحليل على 10 وتعيين قيمة Cutoff_Miles لنقاط الطلب في المناطق الحضرية على 2.
Impedance
Transformation (optional)
This sets the equation for transforming the network cost between
facilities and demand points. This property, coupled with the Impedance
Parameter, specifies how severely the network impedance between facilities and
demand points influences the solver's choice of facilities.
· LINEAR—The transformed network impedance between the facility and the
demand point is the same as the shortest-path network impedance between them.
With this option, the impedance parameter is always set to one. This is the
default.
· POWER—The transformed network impedance between the facility and the
demand point is equal to the shortest-path network impedance raised to the
power specified by the impedance parameter. Use this option with a positive
impedance parameter to specify higher weight to nearby facilities.
· EXPONENTIAL —The transformed network impedance between the facility and
the demand point is equal to the mathematical constant e raised to the power
specified by the shortest-path network impedance multiplied with the impedance
parameter. Use this option with a positive impedance parameter to specify a
very high weight to nearby facilities.Exponential transformations are commonly
used in conjunction with an impedance cutoff.
Demand points have an ImpedanceTransformation property, which, if set, overrides
the Impedance Transformation property of the analysis layer. You might
determine the impedance transformation should be different for urban and rural
residents. You can model this by setting the impedance transformation for the
analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Impedance
Parameter (optional)
Provides a parameter value to the equations specified in the Impedance
transformation parameter. The parameter value is ignored when the impedance
transformation is of type Linear. For Power and Exponential impedance
transformations, the value should be nonzero.
Demand points have an ImpedanceParameter property, which, if set,
overrides the Impedance Parameter property of the analysis layer. You might
determine that the impedance parameter should be different for urban and rural
residents. You can model this by setting the impedance transformation for the
analysis layer to match that of rural residents and setting the impedance
transformation for the demand points in urban areas to match that of urbanites.
Target
Market Share (optional)
Specifies the target market share in percentage to solve for when the
Location-Allocation Problem Type parameter is set to Target market share. It is
the percentage of the total demand weight that you want your solution
facilities to capture. The solver chooses the minimum number of facilities
required to capture the target market share specified by this numeric value.
Default
Capacity (optional)
Specifies the default capacity of facilities when the Location-Allocation
Problem Type parameter is set to Maximize capacitated coverage. This parameter
is ignored for all other problem types.
Facilities have a Capacity property, which, if set to a nonnull value,
overrides the Default Capacity parameter for that facility.
Start Time
(optional)
Indicates the time and date of departure. The departure time can be from
facilities or demand points, depending on whether travel is from demand to
facility or facility to demand.
If you have chosen a traffic-based impedance attribute, the solution will
be generated given dynamic traffic conditions at the time of day specified
here. A date and time can be specified as 5/14/2012 10:30 AM.
Instead of using a particular date, a day of the week can be specified
using the following dates:
· Today—12/30/1899
· Sunday—12/31/1899
· Monday—1/1/1900
· Tuesday—1/2/1900
· Wednesday—1/3/1900
· Thursday—1/4/1900
· Friday—1/5/1900
· Saturday—1/6/1900
For example, to specify that
travel should begin at 5:00 p.m. on Tuesday, specify the parameter value as
1/2/1900 5:00 PM.
Accumulators
(optional)
A list of cost attributes to be accumulated during analysis. These
accumulation attributes are purely for reference; the solver only uses the cost
attribute specified by the Impedance Attribute parameter to calculate the
route.
For each cost attribute that is accumulated, a Total_[Impedance] property
is added to the routes that are output by the solver.
Use
Hierarchy in Analysis (optional)
· Checked—Use the hierarchy attribute for the analysis. Using a hierarchy
results in the solver preferring higher-order edges to lower-order edges.
Hierarchical solves are faster, and they can be used to simulate the preference
of a driver who chooses to travel on freeways over local roads when
possible—even if that means a longer trip. This option is enabled only if the
input network dataset has a hierarchy attribute.
· Unchecked—Do not use the hierarchy attribute for the analysis. Not using a
hierarchy yields an exact route for the network dataset.
The parameter is disabled if a hierarchy attribute is not defined on the
network dataset used to perform the analysis.
Output
Path Shape (optional)
· NO_LINES—No shape will be generated for the output of the analysis.
· STRAIGHT_LINES—The output line shapes will be straight lines connecting
the solution facilities to their allocated demand points.
U-Turn
Policy (optional)
The U-Turn policy at junctions. Allowing U-turns implies the solver can
turn around at a junction and double back on the same street. Given that
junctions represent street intersections and dead ends, different vehicles may
be able to turn around at some junctions but not at others—it depends on
whether the junction represents an intersection or dead end. To accommodate
this, the U-turn policy parameter is implicitly specified by how many edges
connect to the junction, which is known as junction valency. The acceptable
values for this parameter are listed below; each is followed by a description
of its meaning in terms of junction valency.
· ALLOW_UTURNS—U-turns are permitted at junctions with any number of
connected edges. This is the default value.
· NO_UTURNS—U-turns are prohibited at all junctions, regardless of junction
valency. Note, however, that U-turns are still permitted at network locations
even when this setting is chosen; however, you can set the individual network
location's CurbApproach property to prohibit U-turns there as well.
· ALLOW_DEAD_ENDS_ONLY—U-turns are prohibited at all junctions, except those
that have only one adjacent edge (a dead end).
· ALLOW_DEAD_ENDS_AND_INTERSECTIONS_ONLY—U-turns are prohibited at junctions
where exactly two adjacent edges meet but are permitted at intersections
(junctions with three or more adjacent edges) and dead ends (junctions with
exactly one adjacent edge). Often, networks have extraneous junctions in the
middle of road segments. This option prevents vehicles from making U-turns at
these locations.
If you need a more precisely defined U-turn policy, consider adding a
global turn delay evaluator to a network cost attribute, or adjusting its
settings if one exists, and pay particular attention to the configuration of
reverse turns. Also, look at setting the CurbApproach property of your network
locations.
Restrictions
(optional)
A list of restriction attributes to apply during the analysis.
8.
Impedance Transformation (optional) تحويل المعاوقة (اختياري)
This sets the equation
for transforming the network cost between facilities and demand points. This
property, coupled with the Impedance Parameter, specifies how severely the
network impedance between facilities and demand points influences the solver's
choice of facilities.
هذا يحدد معادلة تحويل تكلفة الشبكة بين المرافق
ونقاط الطلب. تحدد هذه الخاصية ، إلى جانب معلمة المعاوقة ، مدى شدة تأثير مقاومة
الشبكة بين المرافق ونقاط الطلب على اختيار الحلول للمرافق.
• LINEAR - إن
معاوقة الشبكة المحولة بين المنشأة ونقطة الطلب هي نفس مقاومة أقصر مسار للشبكة
بينهما. باستخدام هذا الخيار ، يتم دائمًا تعيين معلمة المعاوقة على واحد. هذا هو
الافتراضي.
• الطاقة - تكون مقاومة
الشبكة المحولة بين المنشأة ونقطة الطلب مساوية لمقاومة شبكة أقصر مسار مرفوعة إلى
القدرة المحددة بواسطة معلمة المعاوقة. استخدم هذا الخيار مع معلمة مقاومة موجبة
لتحديد وزن أعلى للمنشآت المجاورة.
• EXPONENTIAL - تكون مقاومة الشبكة المحولة بين المنشأة ونقطة الطلب مساوية
للثابت الرياضي e الذي تم رفعه إلى الطاقة المحددة بواسطة مقاومة الشبكة الأقصر
مسارًا مضروبة في معلمة المعاوقة. استخدم هذا الخيار مع معلمة مقاومة موجبة لتحديد
وزن مرتفع جدًا للمنشآت القريبة. تستخدم التحويلات الأسية بشكل شائع بالتزامن مع
قطع المعاوقة.
تحتوي نقاط الطلب على خاصية ImpedanceTransformation ، والتي ، إذا تم تعيينها ، تتجاوز خاصية تحويل الممانعة لطبقة
التحليل. قد تحدد أن تحويل المعاوقة يجب أن يكون مختلفًا بالنسبة لسكان الحضر
والريف. يمكنك نمذجة ذلك عن طريق تعيين تحويل المعاوقة لطبقة التحليل لتتناسب مع
تلك الخاصة بسكان الريف وتعيين تحويل المعاوقة لنقاط الطلب في المناطق الحضرية
لمطابقة تلك الخاصة بسكان المدن.
9.
Impedance Parameter (optional) معلمة
المعاوقة (اختياري)
يوفر قيمة معلمة للمعادلات المحددة في معلمة تحويل
المعاوقة. يتم تجاهل قيمة المعلمة عندما يكون تحويل المعاوقة من النوع الخطي.
بالنسبة إلى تحويلات المعاوقة الاستيعابية والاستطاعة ، يجب أن تكون القيمة غير
صفرية.
تحتوي نقاط الطلب على خاصية ImpedanceParameter ، والتي ، إذا تم تعيينها ، تتجاوز خاصية Impedance Parameter لطبقة التحليل. قد تقرر أن معامل المعاوقة يجب أن يكون مختلفًا بالنسبة
لسكان الحضر والريف. يمكنك نمذجة ذلك عن طريق تعيين تحويل المعاوقة لطبقة التحليل
لتتناسب مع تلك الخاصة بسكان الريف وتعيين تحويل المعاوقة لنقاط الطلب في المناطق
الحضرية لمطابقة تلك الخاصة بسكان المدن.
10.
Target Market Share (optional) الحصة
السوقية المستهدفة (اختيارية)
تحدد حصة السوق المستهدفة بالنسبة المئوية لحلها
عند تعيين معلمة نوع مشكلة تخصيص الموقع على حصة السوق المستهدفة. إنها النسبة المئوية
من إجمالي وزن الطلب الذي تريد أن تلتقطه مرافق الحل الخاصة بك. يختار المحلل الحد
الأدنى لعدد التسهيلات المطلوبة لالتقاط حصة السوق المستهدفة المحددة بواسطة هذه
القيمة الرقمية.
11.
Default Capacity (optional) القدرة
الافتراضية (اختياري)
Specifies the default
capacity of facilities when the Location-Allocation Problem Type parameter is
set to Maximize capacitated coverage. This parameter is ignored for all other
problem types.
Facilities have a
Capacity property, which, if set to a nonnull value, overrides the Default
Capacity parameter for that facility.
يحدد السعة الافتراضية للمنشآت عند تعيين معلمة
نوع مشكلة تخصيص الموقع على زيادة التغطية المكثفة إلى الحد الأقصى. يتم تجاهل هذه
المعلمة لجميع أنواع المشاكل الأخرى.
تحتوي المنشآت على خاصية القدرة ، والتي إذا تم
تعيينها على قيمة غير خالية ، فستتجاوز معلمة السعة الافتراضية لتلك المنشأة.
12.
Start Time (optional) وقت البدء
(اختياري)
Indicates the time and date of departure. The departure time can be from facilities or demand points, depending on whether travel is from demand to facility or facility to demand.
يشير إلى وقت وتاريخ المغادرة. يمكن أن يكون وقت
المغادرة من المرافق أو نقاط الطلب ، اعتمادًا على ما إذا كان السفر من طلب إلى
منشأة أو منشأة إلى أخرى.
إذا اخترت سمة المعاوقة المستندة إلى حركة المرور
، فسيتم إنشاء الحل وفقًا لظروف حركة المرور الديناميكية في الوقت المحدد هنا من
اليوم. يمكن تحديد التاريخ والوقت كـ 14/5/2012 10:30 صباحًا.
بدلاً من استخدام تاريخ معين ، يمكن تحديد يوم من
أيام الأسبوع باستخدام التواريخ التالية:
• اليوم - 12/30/1899
• الأحد - 12/31/1899
• الاثنين - 1/1/1900
• الثلاثاء - 1/2/1900
• الأربعاء - 1/3/1900
• الخميس - 1/4/1900
• الجمعة - 1/5/1900
• السبت - 1/6/1900
على سبيل المثال ، لتحديد أن السفر يجب أن يبدأ في
الساعة 5:00 مساءً. في يوم الثلاثاء ، حدد قيمة المعلمة كـ 1/2/1900 5:00 مساءً.Specifies the default
capacity of facilities when the Location-Allocation Problem Type parameter is
set to Maximize capacitated coverage. This parameter is ignored for all other
problem types.
13.
Accumulators التراكم
14. Hierarchy تسلسل
15. Output Option خيارات الإخراج
16. Restrictions قيود
تم شرحهم في أداة سابقة لفهم هذه الفئات اضغط هنا للوصول الى أداة تحتوي هذه الفئات مشروحة.
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