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.
Point DensityTool, Density
Toolset, Spatial Analyst Tools Toolbox
Point Density
Calculates a
magnitude-per-unit area from point features that fall within a neighborhood
around each cell.
تحسب المقدار لكل وحدة مساحة من المعالم النقطية
التي تقع داخل حي حول كل خلية.
1.Input point features أدخل معالم
النقطة
The input point features
for which to calculate the density.
ميزات نقطة الإدخال المطلوب حساب الكثافة لها.
Population field
Field denoting population values for each point. The population field is
the count or quantity to be used in the calculation of a continuous surface.
Values in the population field may be integer or floating point.
The options and default behaviors for the field are listed below.
·Use None if no item or special value will be used and each feature will be
counted once.
·You can use Shape if input features contains Z.
·Otherwise, the default field is POPULATION. The following conditions may
also apply.
oIf there is no POPULATION field, but there is a POPULATIONxxxx field, this
is used by default. The xxxx can be any valid character, such as POPULATION6,
POPULATION1974, or POPULATIONROADTYPE.
oIf there is no POPULATION field or POPULATIONxxxx field, but there is a
POP field, this is used by default.
oIf there is no POPULATION field, POPULATIONxxxx field, or POP field, but
there is a POPxxxx field, this is used by default.
oIf there is no POPULATION field, POPULATIONxxxx field, POP field, or
POPxxxx field, NONE is used by default.
Output raster
The output point density raster.
It is always a floating point raster.
Output cell size (optional)
The cell size of the output raster that will be created.
This parameter can be defined by a numeric value or obtained from an
existing raster dataset. If the cell size hasn't been explicitly specified as
the parameter value, the environment cell size value will be used if specified;
otherwise, additional rules will be used to calculate it from the other inputs.
See the usage for more detail.
Neighborhood (optional)
Dictates the shape of the area around each cell that is used to calculate
the density value.
·Annulus—A torus (donut shaped) neighborhood defined by an inner and outer
radius.
·Circle—A circular neighborhood with the given radius. This is default
where the radius is the shortest of the width or height of the extent of the
input point features, in the output spatial reference, divided by 30.
·Rectangle—A rectangular neighborhood with the given height and width.
·Wedge—A wedge-shaped neighborhood. A wedge is specified by a start angle,
an end angle and a radius. The wedge extends counterclockwise from the starting
angle to the ending angle. Angles are specified in arithmetic degrees
(counterclockwise from the positive x-axis). Negative angles may be used.
·Cell | Map—Defines the units of the selected neighborhood measurements in
either cells or map units (based on the linear unit of the projection of the
output spatial reference).
Area units (optional)
The desired area units of the output density values.
A default unit is selected based on the linear unit of the output spatial
reference. You can change this to the appropriate unit if you wish to convert
the density output. Values for line density convert the units of both length
and area.
If no output spatial reference is specified, the output spatial reference
will be the same as the input feature class. The default output density units
is determined by the linear units of the output spatial reference as follows.
If the output linear units are meters, the output area density units will be
set to SQUARE_KILOMETERS, outputting square kilometers for point features or
kilometers per square kilometers for polyline features. If the output linear
units are feet, the output area density units will be set to SQUARE_MILES.
If the output units is anything other than feet or meters, the output area
density units will be set to SQUARE_MAP_UNITS. That is, the output density
units will be the square of the linear units of the output spatial reference.
For example, if the output linear units is centimeters, the output area density
units will be SQUARE_MAP_UNITS, which would result in square centimeters. If
the output linear units is kilometers, the output area density units will be
SQUARE_MAP_UNITS, which would result in square kilometers.
The available options and their corresponding output density units are the
following:
·SQUARE_MAP_UNITS—For the square of the linear units of the output spatial
reference.
·SQUARE_MILES—For miles (U.S.).
·SQUARE_KILOMETERS—For kilometers.
·ACRES—For acres (U.S.).
·HECTARES—For hectares.
·SQUARE_YARDS—For yards (U.S.).
·SQUARE_FEET—For feet (U.S.).
·SQUARE_INCHES—For inches (U.S.).
·SQUARE_METERS—For meters.
·SQUARE_CENTIMETERS—For centimeters.
·SQUARE_MILLIMETERS—For millimeters.
2.Population field حقل السكان
Field denoting
population values for each point. The population field is the count or quantity
to be used in the calculation of a continuous surface.
Values in the population
field may be integer or floating point.
The options and default
behaviors for the field are listed below.
·Use None if no item or special value will be used and each feature
will be counted once.
·You can use Shape if input features contains Z.
·Otherwise, the default field is POPULATION. The following
conditions may also apply.
oIf there is no POPULATION field, but there is a
POPULATIONxxxx field, this is used by default. The xxxx can be any valid
character, such as POPULATION6, POPULATION1974, or POPULATIONROADTYPE.
oIf there is no POPULATION field or
POPULATIONxxxx field, but there is a POP field, this is used by default.
oIf there is no POPULATION field, POPULATIONxxxx
field, or POP field, but there is a POPxxxx field, this is used by default.
oIf there is no POPULATION field, POPULATIONxxxx
field, POP field, or POPxxxx field, NONE is used by default.
حقل يشير إلى قيم السكان لكل نقطة. حقل السكان هو
العدد أو الكمية التي سيتم استخدامها في حساب سطح مستمر.
قد تكون القيم في حقل السكان عددًا صحيحًا أو
فاصلة عائمة.
• استخدم "لا
شيء" إذا لم يتم استخدام أي عنصر أو قيمة خاصة وسيتم احتساب كل ميزة مرة
واحدة.
• يمكنك استخدام الشكل
إذا كانت ميزات الإدخال تحتوي على Z.
• خلاف ذلك ، فإن الحقل
الافتراضي هو السكان. قد تنطبق الشروط التالية أيضًا.
o إذا
لم يكن هناك حقل "عدد السكان" ، ولكن يوجد حقل "عدد سكان" ،
فسيتم استخدامه افتراضيًا. يمكن أن يكون xxxx أي
حرف صالح ، مثل POPULATION6 أو POPULATION1974 أو POPULATIONROADTYPE.
o إذا
لم يكن هناك حقل "سكان" أو حقل "عدد سكان" ، ولكن يوجد حقل POP ،
فسيتم استخدامه افتراضيًا.
o إذا
لم يكن هناك حقل "سكان" أو حقل "عدد سكان" أو "POP"
، ولكن هناك حقل POPxxxx ، فسيتم استخدامه
افتراضيًا.
o إذا
لم يكن هناك حقل "سكان" أو حقل "عدد سكان" أو "حقل POP"
أو حقل POPxxxx ، فسيتم استخدام
"لا شيء" افتراضيًا.
Output raster
The output point density raster.
It is always a floating point raster.
Output cell size (optional)
The cell size of the output raster that will be created.
This parameter can be defined by a numeric value or obtained from an
existing raster dataset. If the cell size hasn't been explicitly specified as
the parameter value, the environment cell size value will be used if specified;
otherwise, additional rules will be used to calculate it from the other inputs.
See the usage for more detail.
Neighborhood (optional)
Dictates the shape of the area around each cell that is used to calculate
the density value.
·Annulus—A torus (donut shaped) neighborhood defined by an inner and outer
radius.
·Circle—A circular neighborhood with the given radius. This is default
where the radius is the shortest of the width or height of the extent of the
input point features, in the output spatial reference, divided by 30.
·Rectangle—A rectangular neighborhood with the given height and width.
·Wedge—A wedge-shaped neighborhood. A wedge is specified by a start angle,
an end angle and a radius. The wedge extends counterclockwise from the starting
angle to the ending angle. Angles are specified in arithmetic degrees
(counterclockwise from the positive x-axis). Negative angles may be used.
·Cell | Map—Defines the units of the selected neighborhood measurements in
either cells or map units (based on the linear unit of the projection of the
output spatial reference).
Area units (optional)
The desired area units of the output density values.
A default unit is selected based on the linear unit of the output spatial
reference. You can change this to the appropriate unit if you wish to convert
the density output. Values for line density convert the units of both length
and area.
If no output spatial reference is specified, the output spatial reference
will be the same as the input feature class. The default output density units
is determined by the linear units of the output spatial reference as follows.
If the output linear units are meters, the output area density units will be
set to SQUARE_KILOMETERS, outputting square kilometers for point features or
kilometers per square kilometers for polyline features. If the output linear
units are feet, the output area density units will be set to SQUARE_MILES.
If the output units is anything other than feet or meters, the output area
density units will be set to SQUARE_MAP_UNITS. That is, the output density
units will be the square of the linear units of the output spatial reference.
For example, if the output linear units is centimeters, the output area density
units will be SQUARE_MAP_UNITS, which would result in square centimeters. If
the output linear units is kilometers, the output area density units will be
SQUARE_MAP_UNITS, which would result in square kilometers.
The available options and their corresponding output density units are the
following:
·SQUARE_MAP_UNITS—For the square of the linear units of the output spatial
reference.
·SQUARE_MILES—For miles (U.S.).
·SQUARE_KILOMETERS—For kilometers.
·ACRES—For acres (U.S.).
·HECTARES—For hectares.
·SQUARE_YARDS—For yards (U.S.).
·SQUARE_FEET—For feet (U.S.).
·SQUARE_INCHES—For inches (U.S.).
·SQUARE_METERS—For meters.
·SQUARE_CENTIMETERS—For centimeters.
·SQUARE_MILLIMETERS—For millimeters.
3.Output raster البيانات النقطية
المخرجة
The output point density
raster.
It is always a floating
point raster.
كثافة نقطة الإخراج النقطية.
إنها دائمًا نقطية فاصلة عائمة.
Output cell size (optional)
The cell size of the output raster that will be created.
This parameter can be defined by a numeric value or obtained from an
existing raster dataset. If the cell size hasn't been explicitly specified as
the parameter value, the environment cell size value will be used if specified;
otherwise, additional rules will be used to calculate it from the other inputs.
See the usage for more detail.
Neighborhood (optional)
Dictates the shape of the area around each cell that is used to calculate
the density value.
·Annulus—A torus (donut shaped) neighborhood defined by an inner and outer
radius.
·Circle—A circular neighborhood with the given radius. This is default
where the radius is the shortest of the width or height of the extent of the
input point features, in the output spatial reference, divided by 30.
·Rectangle—A rectangular neighborhood with the given height and width.
·Wedge—A wedge-shaped neighborhood. A wedge is specified by a start angle,
an end angle and a radius. The wedge extends counterclockwise from the starting
angle to the ending angle. Angles are specified in arithmetic degrees
(counterclockwise from the positive x-axis). Negative angles may be used.
·Cell | Map—Defines the units of the selected neighborhood measurements in
either cells or map units (based on the linear unit of the projection of the
output spatial reference).
Area units (optional)
The desired area units of the output density values.
A default unit is selected based on the linear unit of the output spatial
reference. You can change this to the appropriate unit if you wish to convert
the density output. Values for line density convert the units of both length
and area.
If no output spatial reference is specified, the output spatial reference
will be the same as the input feature class. The default output density units
is determined by the linear units of the output spatial reference as follows.
If the output linear units are meters, the output area density units will be
set to SQUARE_KILOMETERS, outputting square kilometers for point features or
kilometers per square kilometers for polyline features. If the output linear
units are feet, the output area density units will be set to SQUARE_MILES.
If the output units is anything other than feet or meters, the output area
density units will be set to SQUARE_MAP_UNITS. That is, the output density
units will be the square of the linear units of the output spatial reference. For
example, if the output linear units is centimeters, the output area density
units will be SQUARE_MAP_UNITS, which would result in square centimeters. If
the output linear units is kilometers, the output area density units will be
SQUARE_MAP_UNITS, which would result in square kilometers.
The available options and their corresponding output density units are the
following:
·SQUARE_MAP_UNITS—For the square of the linear units of the output spatial
reference.
·SQUARE_MILES—For miles (U.S.).
·SQUARE_KILOMETERS—For kilometers.
·ACRES—For acres (U.S.).
·HECTARES—For hectares.
·SQUARE_YARDS—For yards (U.S.).
·SQUARE_FEET—For feet (U.S.).
·SQUARE_INCHES—For inches (U.S.).
·SQUARE_METERS—For meters.
·SQUARE_CENTIMETERS—For centimeters.
·SQUARE_MILLIMETERS—For millimeters.
4.Output cell size (optional) حجم
الخليجة المخرج (اختياري)
The cell size of the
output raster that will be created.
This parameter can be
defined by a numeric value or obtained from an existing raster dataset. If the
cell size hasn't been explicitly specified as the parameter value, the
environment cell size value will be used if specified; otherwise, additional
rules will be used to calculate it from the other inputs. See the usage for
more detail.
حجم خلية البيانات النقطية الناتجة التي سيتم
إنشاؤها.
يمكن تحديد هذه المعلمة بقيمة عددية أو الحصول
عليها من مجموعة بيانات نقطية موجودة. إذا لم يتم تحديد حجم الخلية بشكل صريح
كقيمة المعلمة ، فسيتم استخدام قيمة حجم خلية البيئة إذا تم تحديدها ؛ خلاف ذلك ،
سيتم استخدام قواعد إضافية لحسابها من المدخلات الأخرى. انظر الاستخدام لمزيد من
التفاصيل.
Neighborhood (optional)
Dictates the shape of the area around each cell that is used to calculate
the density value.
·Annulus—A torus (donut shaped) neighborhood defined by an inner and outer
radius.
·Circle—A circular neighborhood with the given radius. This is default
where the radius is the shortest of the width or height of the extent of the
input point features, in the output spatial reference, divided by 30.
·Rectangle—A rectangular neighborhood with the given height and width.
·Wedge—A wedge-shaped neighborhood. A wedge is specified by a start angle,
an end angle and a radius. The wedge extends counterclockwise from the starting
angle to the ending angle. Angles are specified in arithmetic degrees
(counterclockwise from the positive x-axis). Negative angles may be used.
·Cell | Map—Defines the units of the selected neighborhood measurements in
either cells or map units (based on the linear unit of the projection of the
output spatial reference).
Area units (optional)
The desired area units of the output density values.
A default unit is selected based on the linear unit of the output spatial
reference. You can change this to the appropriate unit if you wish to convert
the density output. Values for line density convert the units of both length
and area.
If no output spatial reference is specified, the output spatial reference
will be the same as the input feature class. The default output density units
is determined by the linear units of the output spatial reference as follows.
If the output linear units are meters, the output area density units will be
set to SQUARE_KILOMETERS, outputting square kilometers for point features or
kilometers per square kilometers for polyline features. If the output linear
units are feet, the output area density units will be set to SQUARE_MILES.
If the output units is anything other than feet or meters, the output area
density units will be set to SQUARE_MAP_UNITS. That is, the output density
units will be the square of the linear units of the output spatial reference.
For example, if the output linear units is centimeters, the output area density
units will be SQUARE_MAP_UNITS, which would result in square centimeters. If
the output linear units is kilometers, the output area density units will be
SQUARE_MAP_UNITS, which would result in square kilometers.
The available options and their corresponding output density units are the
following:
·SQUARE_MAP_UNITS—For the square of the linear units of the output spatial
reference.
·SQUARE_MILES—For miles (U.S.).
·SQUARE_KILOMETERS—For kilometers.
·ACRES—For acres (U.S.).
·HECTARES—For hectares.
·SQUARE_YARDS—For yards (U.S.).
·SQUARE_FEET—For feet (U.S.).
·SQUARE_INCHES—For inches (U.S.).
·SQUARE_METERS—For meters.
·SQUARE_CENTIMETERS—For centimeters.
·SQUARE_MILLIMETERS—For millimeters.
5.Neighborhood (optional) الحي
(اختياري)
Dictates the shape of
the area around each cell that is used to calculate the density value.
·Annulus—A torus (donut shaped) neighborhood defined by an inner
and outer radius.
·Circle—A circular neighborhood with the given radius. This is
default where the radius is the shortest of the width or height of the extent
of the input point features, in the output spatial reference, divided by 30.
·Rectangle—A rectangular neighborhood with the given height and
width.
·Wedge—A wedge-shaped neighborhood. A wedge is specified by a start
angle, an end angle and a radius. The wedge extends counterclockwise from the
starting angle to the ending angle. Angles are specified in arithmetic degrees
(counterclockwise from the positive x-axis). Negative angles may be used.
·Cell | Map—Defines the units of the selected neighborhood
measurements in either cells or map units (based on the linear unit of the
projection of the output spatial reference).
تملي شكل المنطقة حول كل خلية تُستخدم لحساب قيمة
الكثافة.
• الحلقة - حلق (على شكل
دونات) محدد بنصف قطر داخلي وخارجي.
• دائرة - حي دائري بنصف
قطر معين. هذا هو الوضع الافتراضي حيث يكون نصف القطر هو أقصر عرض أو ارتفاع لمدى
معالم نقطة الإدخال ، في الإسناد المكاني الناتج ، مقسومًا على 30.
• مستطيل - حي مستطيل مع
ارتفاع وعرض محددين.
• إسفين - حي على شكل
إسفين. يتم تحديد الإسفين بزاوية البداية وزاوية النهاية ونصف القطر. يمتد الإسفين
عكس اتجاه عقارب الساعة من زاوية البداية إلى زاوية النهاية. يتم تحديد الزوايا
بالدرجات الحسابية (عكس اتجاه عقارب الساعة من المحور x
الموجب). يمكن استخدام الزوايا السلبية.
• خلية | الخريطة — تحدد
وحدات قياسات الحي المحددة في أي من الخلايا أو وحدات الخريطة (بناءً على الوحدة
الخطية لإسقاط الإسناد المكاني الناتج).
Area units (optional)
The desired area units of the output density values.
A default unit is selected based on the linear unit of the output spatial
reference. You can change this to the appropriate unit if you wish to convert
the density output. Values for line density convert the units of both length
and area.
If no output spatial reference is specified, the output spatial reference
will be the same as the input feature class. The default output density units
is determined by the linear units of the output spatial reference as follows.
If the output linear units are meters, the output area density units will be
set to SQUARE_KILOMETERS, outputting square kilometers for point features or
kilometers per square kilometers for polyline features. If the output linear
units are feet, the output area density units will be set to SQUARE_MILES.
If the output units is anything other than feet or meters, the output area
density units will be set to SQUARE_MAP_UNITS. That is, the output density
units will be the square of the linear units of the output spatial reference.
For example, if the output linear units is centimeters, the output area density
units will be SQUARE_MAP_UNITS, which would result in square centimeters. If
the output linear units is kilometers, the output area density units will be
SQUARE_MAP_UNITS, which would result in square kilometers.
The available options and their corresponding output density units are the
following:
·SQUARE_MAP_UNITS—For the square of the linear units of the output spatial
reference.
·SQUARE_MILES—For miles (U.S.).
·SQUARE_KILOMETERS—For kilometers.
·ACRES—For acres (U.S.).
·HECTARES—For hectares.
·SQUARE_YARDS—For yards (U.S.).
·SQUARE_FEET—For feet (U.S.).
·SQUARE_INCHES—For inches (U.S.).
·SQUARE_METERS—For meters.
·SQUARE_CENTIMETERS—For centimeters.
·SQUARE_MILLIMETERS—For millimeters.
6.Area units (optional) وحدات المساحة
(اختياري)
The desired area units
of the output density values.
A default unit is
selected based on the linear unit of the output spatial reference. You can
change this to the appropriate unit if you wish to convert the density output.
Values for line density convert the units of both length and area.
If no output spatial
reference is specified, the output spatial reference will be the same as the
input feature class. The default output density units is determined by the
linear units of the output spatial reference as follows. If the output linear
units are meters, the output area density units will be set to
SQUARE_KILOMETERS, outputting square kilometers for point features or kilometers
per square kilometers for polyline features. If the output linear units are
feet, the output area density units will be set to SQUARE_MILES.
If the output units is
anything other than feet or meters, the output area density units will be set
to SQUARE_MAP_UNITS. That is, the output density units will be the square of
the linear units of the output spatial reference. For example, if the output
linear units is centimeters, the output area density units will be
SQUARE_MAP_UNITS, which would result in square centimeters. If the output
linear units is kilometers, the output area density units will be
SQUARE_MAP_UNITS, which would result in square kilometers.
وحدات المساحة المرغوبة لقيم كثافة الإخراج.
يتم تحديد وحدة افتراضية بناءً على الوحدة الخطية
للمرجع المكاني الناتج. يمكنك تغيير هذا إلى الوحدة المناسبة إذا كنت ترغب في
تحويل ناتج الكثافة. قيم كثافة الخط تقوم بتحويل وحدات الطول والمساحة.
إذا لم يتم تحديد الإسناد المكاني للمخرجات ،
فسيكون الإسناد المكاني الناتج هو نفسه فئة ميزة الإدخال. يتم تحديد وحدات كثافة
الإخراج الافتراضية بواسطة الوحدات الخطية للمرجع المكاني الناتج على النحو
التالي. إذا كانت الوحدات الخطية للإخراج بالأمتار ، فسيتم تعيين وحدات كثافة
منطقة الإخراج على SQUARE_KILOMETERS ، مما ينتج عنه
كيلومترات مربعة لمعالم النقطة أو كيلومتر لكل كيلومتر مربع لميزات الخطوط
المتعددة. إذا كانت وحدات الإخراج الخطية بالأقدام ، فسيتم تعيين وحدات كثافة
منطقة الإخراج على SQUARE_MILES.
إذا كانت وحدات الإخراج بخلاف الأقدام أو الأمتار
، فسيتم تعيين وحدات كثافة منطقة الإخراج على SQUARE_MAP_UNITS. أي أن وحدات كثافة الإخراج ستكون مربع الوحدات الخطية للمرجع
المكاني الناتج. على سبيل المثال ، إذا كانت الوحدات الخطية للإخراج بالسنتيمتر ،
فستكون وحدات كثافة منطقة الإخراج SQUARE_MAP_UNITS ، مما
ينتج عنه سنتيمترات مربعة. إذا كانت الوحدات الخطية الناتجة كيلومترات ، فستكون
وحدات كثافة منطقة الإخراج SQUARE_MAP_UNITS ، مما
ينتج عنه كيلومترات مربعة.
الخيارات المتاحة ووحدات كثافة الإخراج المقابلة
لها هي كما يلي:
تعليقات
إرسال تعليق