Extent

Resumen

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.

Debate

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

Nota:

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.

Sintaxis

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

Nombre	Explicación	Tipo de datos
XMin (Opcional)	The extent XMin value.	Double
YMin (Opcional)	The extent YMin value.	Double
XMax (Opcional)	The extent XMax value.	Double
YMax (Opcional)	The extent YMax value.	Double
ZMin (Opcional)	The extent ZMin value. The value is `None` if there is no z-value.	Double
ZMax (Opcional)	The extent ZMax value. The value is `None` if there is no z-value.	Double
MMin (Opcional)	The extent MMin value. The value is `None` if there is no m-value.	Double
MMax (Opcional)	The extent MMax value. The value is `None` if there is no m-value.	Double
spatial_reference (Opcional)	The spatial reference of the extent.	SpatialReference

Propiedades

Nombre	Explicación	Tipo de datos
JSON (Solo lectura)	A JSON representation of the extent as a string. Sugerencia: The returned string can be converted to a dictionary using the `json` module's `loads` function.	String
MMax (Solo lectura)	The extent MMax value. The value is `None` if there is no m-value.	Double
MMin (Solo lectura)	The extent MMin value. The value is `None` if there is no m-value.	Double
XMax (Solo lectura)	The extent XMax value.	Double
XMin (Solo lectura)	The extent XMin value.	Double
YMax (Solo lectura)	The extent YMax value.	Double
YMin (Solo lectura)	The extent YMin value.	Double
ZMax (Solo lectura)	The extent ZMax value. The value is `None` if there is no z-value.	Double
ZMin (Solo lectura)	The extent ZMin value. The value is `None` if there is no z-value.	Double
depth (Solo lectura)	The extent depth value. The value is `None` if there is no depth value.	Double
geohash (Solo lectura)	A geohash string of the extent.	String
geohashCovers (Solo lectura)	A list of up to the four longest geohash strings that fit within the extent.	String
geohashNeighbors (Solo lectura)	A list of the geohash neighbor strings for the extent.	String
height (Solo lectura)	The extent height value.	Double
lowerLeft (Solo lectura)	The lower left property: A point object is returned.	Point
lowerRight (Solo lectura)	The lower right property: A point object is returned.	Point
polygon (Solo lectura)	Returns the extent as a polygon object.	Polygon
spatialReference (Solo lectura)	The spatial reference of the extent.	SpatialReference
upperLeft (Solo lectura)	The upper left property: A point object is returned.	Point
upperRight (Solo lectura)	The upper right property: A point object is returned.	Point
width (Solo lectura)	The extent width.	Double

Métodos

`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

Nombre Explicación Tipo de datos

second_geometry

A second geometry.

Object

relation

(Opcional)

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

Valor de retorno

Tipo de datos	Explicación
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

Nombre	Explicación	Tipo de datos
second_geometry	A second geometry.	Object

Valor de retorno

Tipo de datos	Explicación
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

Nombre	Explicación	Tipo de datos
second_geometry	A second geometry.	Object

Valor de retorno

Tipo de datos	Explicación
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

Nombre	Explicación	Tipo de datos
second_geometry	A second geometry.	Object

Valor de retorno

Tipo de datos	Explicación
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

Nombre	Explicación	Tipo de datos
second_geometry	A second geometry.	Object

Valor de retorno

Tipo de datos	Explicación
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.

Nombre Explicación Tipo de datos

Nombre	Explicación	Tipo de datos
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 (Opcional)	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

(Opcional)

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

Valor de retorno

Tipo de datos	Explicación
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

Nombre	Explicación	Tipo de datos
second_geometry	A second geometry.	Object

Valor de retorno

Tipo de datos	Explicación
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.

Nombre Explicación Tipo de datos

second_geometry

A second geometry.

Object

relation

(Opcional)

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

Valor de retorno

Tipo de datos	Explicación
Boolean	Returns whether the base geometry is within the comparison geometry.

Muestra de código

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

Resumen

Debate

Nota:

Sintaxis

Propiedades

Sugerencia:

Métodos

contains(second_geometry, {relation})

Valor de retorno

crosses(second_geometry)

Valor de retorno

disjoint(second_geometry)

Valor de retorno

equals(second_geometry)

Valor de retorno

overlaps(second_geometry)

Valor de retorno

projectAs(spatial_reference, {transformation_name})

Valor de retorno

touches(second_geometry)

Valor de retorno

within(second_geometry, {relation})

Valor de retorno

Muestra de código

Temas relacionados

`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})`