Extent

サマリー

An extent is a rectangle specified by providing the coordinate of the lower left corner and the coordinate of the upper right corner in map units.

ディスカッション

The Extent object supports equal (==) and not equal (!=) operators for comparing extents.

注意:

When used as input to ArcGIS Spatial Analyst extension tools—Create Constant Raster, Create Normal Raster, Create Random Raster, Extract By Rectangle, Extract by Mask, and Topo To Raster—only the XMin, YMin, XMax, and YMax values are used by these tools.

構文

Extent({XMin}, {YMin}, {XMax}, {YMax}, {ZMin}, {ZMax}, {MMin}, {MMax}, {spatial_reference})

名前	説明	データタイプ
XMin (オプション)	The extent XMin value.	Double
YMin (オプション)	The extent YMin value.	Double
XMax (オプション)	The extent XMax value.	Double
YMax (オプション)	The extent YMax value.	Double
ZMin (オプション)	The extent ZMin value. The value is `None` if there is no z-value.	Double
ZMax (オプション)	The extent ZMax value. The value is `None` if there is no z-value.	Double
MMin (オプション)	The extent MMin value. The value is `None` if there is no m-value.	Double
MMax (オプション)	The extent MMax value. The value is `None` if there is no m-value.	Double
spatial_reference (オプション)	The spatial reference of the extent.	SpatialReference

プロパティ

名前	説明	データタイプ
JSON (読み取り専用)	A JSON representation of the extent as a string. ヒント: The returned string can be converted to a dictionary using the `json` module's `loads` function.	String
MMax (読み取り専用)	The extent MMax value. The value is `None` if there is no m-value.	Double
MMin (読み取り専用)	The extent MMin value. The value is `None` if there is no m-value.	Double
XMax (読み取り専用)	The extent XMax value.	Double
XMin (読み取り専用)	The extent XMin value.	Double
YMax (読み取り専用)	The extent YMax value.	Double
YMin (読み取り専用)	The extent YMin value.	Double
ZMax (読み取り専用)	The extent ZMax value. The value is `None` if there is no z-value.	Double
ZMin (読み取り専用)	The extent ZMin value. The value is `None` if there is no z-value.	Double
depth (読み取り専用)	The extent depth value. The value is `None` if there is no depth value.	Double
geohash (読み取り専用)	A geohash string of the extent.	String
geohashCovers (読み取り専用)	A list of up to the four longest geohash strings that fit within the extent.	String
geohashNeighbors (読み取り専用)	A list of the geohash neighbor strings for the extent.	String
height (読み取り専用)	The extent height value.	Double
lowerLeft (読み取り専用)	The lower left property: A point object is returned.	Point
lowerRight (読み取り専用)	The lower right property: A point object is returned.	Point
polygon (読み取り専用)	Returns the extent as a polygon object.	Polygon
spatialReference (読み取り専用)	The spatial reference of the extent.	SpatialReference
upperLeft (読み取り専用)	The upper left property: A point object is returned.	Point
upperRight (読み取り専用)	The upper right property: A point object is returned.	Point
width (読み取り専用)	The extent width.	Double

方法

`contains(second_geometry, {relation})`

Specifies whether the base geometry contains the comparison geometry.

The contains method is the opposite of the within method.

Only True relationships are shown in this illustration.

Possible contains relationships

名前説明データタイプ

second_geometry

A second geometry.

Object

relation

(オプション)

Specifies the spatial relationship type that will be used.

BOUNDARY—The relationship has no restrictions for interiors or boundaries.
CLEMENTINI—Interiors of geometries must intersect. This option is equivalent to specifying None. This is the default.
PROPER—Boundaries of geometries must not intersect.

The default value is None.

String

戻り値

データタイプ	説明
Boolean	Returns whether this geometry contains the second geometry.

`crosses(second_geometry)`

Specifies whether the two geometries intersect in a geometry of a lesser shape type.

Two polylines cross if they share only points in common, at least one of which is not an endpoint. A polyline and a polygon cross if they share a polyline or a point (for a vertical line) in common on the interior of the polygon that is not equivalent to the entire polyline.

Only True relationships are shown in this illustration.

Possible crosses relationships

名前	説明	データタイプ
second_geometry	A second geometry.	Object

戻り値

データタイプ	説明
Boolean	Returns whether the two geometries intersect in a geometry of a lesser shape type.

`disjoint(second_geometry)`

Specifies whether the base and comparison geometries have points in common.

Two geometries intersect when this method returns False.

Only True relationships are shown in this illustration.

Possible disjoint relationships

名前	説明	データタイプ
second_geometry	A second geometry.	Object

戻り値

データタイプ	説明
Boolean	Returns whether the two geometries have points in common.

`equals(second_geometry)`

Specifies whether the base and comparison geometries are of the same shape type and define the same set of points in the plane. This is a 2D comparison only; m- and z-values are ignored.

Only True relationships are shown in this illustration.

Possible equals relationships

名前	説明	データタイプ
second_geometry	A second geometry.	Object

戻り値

データタイプ	説明
Boolean	Returns whether the two geometries are of the same shape type and define the same set of points in the plane.

`overlaps(second_geometry)`

Specifies whether the intersection of the two geometries has the same shape type as one of the input geometries and is not equivalent to either of the input geometries.

Only True relationships are shown in this illustration.

Possible overlaps relationships

名前	説明	データタイプ
second_geometry	A second geometry.	Object

戻り値

データタイプ	説明
Boolean	Returns whether the intersection of the two geometries has the same dimension as one of the input geometries.

`projectAs(spatial_reference, {transformation_name})`

Projects a geometry from one spatial reference to another.

When the geometry object and the destination spatial reference do not have a common datum, specify a transformation_name parameter value. For more information, see Geographic datum transformations and ListTransformations.

A vertical transformation will be performed when the following criteria are met:

The geometry object has z-coordinates.
The geometry object's spatial reference and the spatial_reference parameter values both have a vertical coordinate system.
The transformation_name parameter value is a vertical transformation.

When the transformation_name parameter value is a vertical transformation, and neither the geometry object nor the destination spatial reference have a vertical coordinate system, the function will fail with a ValueError exception.

If either the geometry object or the spatial_reference parameter value have an unknown spatial reference, the output geometry's spatial reference will be that of the spatial_reference parameter value. Use of unknown spatial reference is not recommended for analysis.

The projectAs method will not modify m-values, if present.

名前説明データタイプ

名前	説明	データタイプ
spatial_reference	The spatial reference to which the geometry will be projected. The value can be a `SpatialReference` object or the coordinate system name.	SpatialReference
transformation_name (オプション)	The geotransformation name. With ArcGIS Pro, if you do not specify a transformation, none will be applied. With ArcGIS Server, if you do not specify a transformation, a fallback transformation will be applied.	String

spatial_reference

The spatial reference to which the geometry will be projected. The value can be a SpatialReference object or the coordinate system name.

SpatialReference

transformation_name

(オプション)

The geotransformation name.

With ArcGIS Pro, if you do not specify a transformation, none will be applied. With ArcGIS Server, if you do not specify a transformation, a fallback transformation will be applied.

String

戻り値

データタイプ	説明
Object	The projected geometry.

`touches(second_geometry)`

Specifies whether the boundaries of the geometries intersect.

Two geometries touch when the intersection of the geometries is not empty, but the intersection of their interiors is empty. For example, a point touches a polyline only if the point is coincident with one of the polyline end points.

Only True relationships are shown in this illustration.

Possible touches relationships

名前	説明	データタイプ
second_geometry	A second geometry.	Object

戻り値

データタイプ	説明
Boolean	Returns whether the boundaries of the geometries intersect.

`within(second_geometry, {relation})`

Specifies whether the base geometry is within the comparison geometry.

The within method is the opposite operator of the contains method.

Only True relationships are shown in this illustration.

Possible within relationships

The base geometry is within the comparison geometry if the base geometry is the intersection of the geometries, and the intersection of their interiors is not empty. The within method is a Clementini operator, except in the case of an empty base geometry.

名前説明データタイプ

second_geometry

A second geometry.

Object

relation

(オプション)

Specifies the spatial relationship type that will be used.

BOUNDARY—The relationship has no restrictions for interiors or boundaries.
CLEMENTINI—Interiors of geometries must intersect. This option is equivalent to specifying None. This is the default.
PROPER—Boundaries of geometries must not intersect.

The default value is None.

String

戻り値

データタイプ	説明
Boolean	Returns whether the base geometry is within the comparison geometry.

コードのサンプル

Extent example

Display extent object properties for features.

import arcpy

feature_class = 'c:/Data/Florida.gdb/airports'

# Fetch each feature from the cursor and examine the extent properties
for row in arcpy.da.SearchCursor(feature_class, ['SHAPE@', 'CNTY_NAME']):
    extent = row[0].extent
    print('Extent of county {}:'.format(row[1]))
    print('XMin: {}, YMin: {}'.format(extent.XMin, extent.YMin))
    print('XMax: {}, YMax: {}'.format(extent.XMax, extent.YMax))

Extent (Environment setting)

Extent

サマリー

ディスカッション

注意:

構文

プロパティ

ヒント:

方法

contains(second_geometry, {relation})

戻り値

crosses(second_geometry)

戻り値

disjoint(second_geometry)

戻り値

equals(second_geometry)

戻り値

overlaps(second_geometry)

戻り値

projectAs(spatial_reference, {transformation_name})

戻り値

touches(second_geometry)

戻り値

within(second_geometry, {relation})

戻り値

コードのサンプル

関連トピック

`contains(second_geometry, {relation})`

`crosses(second_geometry)`

`disjoint(second_geometry)`

`equals(second_geometry)`

`overlaps(second_geometry)`

`projectAs(spatial_reference, {transformation_name})`

`touches(second_geometry)`

`within(second_geometry, {relation})`