Extent

Zusammenfassung

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.

Auswertung

Hinweis:

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

Syntax

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

Parameter	Erklärung	Datentyp
XMin	The extent XMin value.	Double
YMin	The extent YMin value.	Double
XMax	The extent XMax value.	Double
YMax	The extent YMax value.	Double
ZMin	The extent ZMin value. None if no Z value.	Double
ZMax	The extent ZMax value. None if no Z value.	Double
MMin	The extent MMin value. None if no M value.	Double
MMax	The extent MMax value. None if no M value.	Double

Eigenschaften

Eigenschaft	Erklärung	Datentyp
JSON (Nur lesen)	Returns a JSON representation of the extent as a string. Tipp: The returned string can be converted to a dictionary using the json module's loads function.	String
MMax (Nur lesen)	The extent MMax value. None if no M value.	Double
MMin (Nur lesen)	The extent MMin value. None if no M value.	Double
XMax (Nur lesen)	The extent XMax value.	Double
XMin (Nur lesen)	The extent XMin value.	Double
YMax (Nur lesen)	The extent YMax value.	Double
YMin (Nur lesen)	The extent YMin value.	Double
ZMax (Nur lesen)	The extent ZMax value. None if no Z value.	Double
ZMin (Nur lesen)	The extent ZMin value. None if no Z value.	Double
depth (Nur lesen)	The extent depth value. None if no depth.	Double
height (Nur lesen)	The extent height value.	Double
lowerLeft (Nur lesen)	The lower left property: A point object is returned.	Point
lowerRight (Nur lesen)	The lower right property: A point object is returned.	Point
polygon (Nur lesen)	Return the extent as a polygon object.	Polygon
spatialReference (Nur lesen)	The spatial reference of the extent.	SpatialReference
upperLeft (Nur lesen)	The upper left property: A point object is returned.	Point
upperRight (Nur lesen)	The upper right property: A point object is returned	Point
width (Nur lesen)	The extent width value.	Double

Methodenübersicht

Methode	Erklärung
contains (second_geometry, {relation})	Indicates if the base geometry contains the comparison geometry. contains is the opposite of within. Only True relationships are shown in this illustration.
crosses (second_geometry)	Gibt an, ob die beiden Geometrien sich in einer Geometrie mit einem geringeren Shape-Typ überschneiden. Zwei Polylinien kreuzen sich, wenn sie nur Punkte gemeinsam haben, von denen mindestens einer kein Endpunkt ist. Eine Polylinie und ein Polygon kreuzen sich, wenn sie im Inneren des Polygons eine Polylinie oder einen Punkt (für eine vertikale Linie) gemeinsam haben, die bzw. der nicht der gesamten Polylinie entspricht. Only True relationships are shown in this illustration.
disjoint (second_geometry)	Gibt an, ob die Basis- und die Vergleichsgeometrie keine gemeinsamen Punkte aufweisen. Zwei Geometrien überschneiden sich, wenn disjoint den Wert False zurückgibt. Only True relationships are shown in this illustration.
equals (second_geometry)	Indicates if 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.
overlaps (second_geometry)	Gibt an, üb die Überschneidung der beiden Geometrien denselben Shape-Typ wie eine der Eingabegeometrien aufweist, aber keiner der Eingabegeometrien entspricht. Only True relationships are shown in this illustration.
projectAs (spatial_reference, {transformation_name})	Projects a geometry and optionally applies a geotransformation. To project, the geometry must have a spatial reference, and not have an unknown coordinate system. The new spatial reference system passed to the method defines the output coordinate system. If either spatial reference is unknown, the coordinates will not be changed. The z- and m-values are not changed by the projectAs method.
touches (second_geometry)	Indicates if 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.
within (second_geometry, {relation})	Indicates if the base geometry is within the comparison geometry. within is the opposite operator of contains. Only True relationships are shown in this illustration. 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. within is a Clementini operator, except in the case of an empty base geometry.

Methoden

contains (second_geometry, {relation})

Parameter	Erklärung	Datentyp
second_geometry	A second geometry.	Object
relation	The spatial relationship type. BOUNDARY — Relationship has no restrictions for interiors or boundaries. CLEMENTINI — Interiors of geometries must intersect. Specifying CLEMENTINI is equivalent to specifying None. This is the default. PROPER — Boundaries of geometries must not intersect. (Der Standardwert ist None)	String

Rückgabewert

Datentyp	Erklärung
Boolean	A return Boolean value of True indicates this geometry contains the second geometry.

crosses (second_geometry)

Parameter	Erklärung	Datentyp
second_geometry	A second geometry.	Object

Rückgabewert

Datentyp	Erklärung
Boolean	Der boolesche Rückgabetyp "True" gibt an, dass sich die beiden Geometrien in einer Geometrie mit einem geringeren Shape-Typ schneiden.

disjoint (second_geometry)

Parameter	Erklärung	Datentyp
second_geometry	A second geometry.	Object

Rückgabewert

Datentyp	Erklärung
Boolean	Der boolesche Rückgabetyp "True" gibt an, dass die beiden Geometrien keine gemeinsamen Punkte aufweisen.

equals (second_geometry)

Parameter	Erklärung	Datentyp
second_geometry	A second geometry.	Object

Rückgabewert

Datentyp	Erklärung
Boolean	A return Boolean value of True indicates that the two geometries are of the same shape type and define the same set of points in the plane.

overlaps (second_geometry)

Parameter	Erklärung	Datentyp
second_geometry	A second geometry.	Object

Rückgabewert

Datentyp	Erklärung
Boolean	Der boolesche Rückgabetyp True gibt an, dass die Überschneidung der beiden Geometrien dieselbe Dimension wie eine der Eingabegeometrien aufweist.

projectAs (spatial_reference, {transformation_name})

Parameter	Erklärung	Datentyp
spatial_reference	The new spatial reference. This can be a SpatialReference object or the coordinate system name.	SpatialReference
transformation_name	The geotransformation name.	String

Rückgabewert

Datentyp	Erklärung
Object	The projected geometry.

touches (second_geometry)

Parameter	Erklärung	Datentyp
second_geometry	A second geometry.	Object

Rückgabewert

Datentyp	Erklärung
Boolean	A return Boolean value of True indicates the boundaries of the geometries intersect.

within (second_geometry, {relation})

Parameter	Erklärung	Datentyp
second_geometry	A second geometry.	Object
relation	The spatial relationship type. BOUNDARY — Relationship has no restrictions for interiors or boundaries. CLEMENTINI — Interiors of geometries must intersect. Specifying CLEMENTINI is equivalent to specifying None. This is the default. PROPER — Boundaries of geometries must not intersect. (Der Standardwert ist None)	String

Rückgabewert

Datentyp	Erklärung
Boolean	A return Boolean value of True indicates this geometry is contained within the second geometry.

Codebeispiel

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))