概要
Geometry objects define a spatial location and an associated geometric shape.
ディスカッション
多くのジオプロセシング ワークフローでは、座標とジオメトリの情報を使用して特定の操作を行うことだけが必要で、新しい (一時) フィーチャクラスを作成し、カーソルを使用してフィーチャクラスにデータを設定し、そのフィーチャクラスを使用し、最後に一時フィーチャクラスを削除するというプロセスをすべて行う必要はないことがあります。ジオプロセシングを簡単に実行できるように、入力および出力の両フィーチャクラスの代わりにジオメトリ オブジェクトを使用できます。Geometry、Multipoint、PointGeometry、Polygon、または Polyline の各クラスを使用して、ジオメトリ オブジェクトを最初から作成できます。
構文
Geometry (geometry, inputs, {spatial_reference}, {has_z}, {has_m})
パラメーター  説明  データ タイプ 
geometry  The geometry type: point, polygon, polyline, or multipoint.  String 
inputs  The coordinates used to create the object. The data type can be either Point or Array objects.  Object 
spatial_reference  The spatial reference of the new geometry. (デフォルト値は次のとおりです None)  SpatialReference 
has_z  The Z state: True for geometry if Z is enabled and False if it is not. (デフォルト値は次のとおりです False)  Boolean 
has_m  The M state: True for geometry if M is enabled and False if it is not. (デフォルト値は次のとおりです False)  Boolean 
プロパティ
プロパティ  説明  データ タイプ 
JSON (読み取り専用)  Returns an Esri JSON representation of the geometry as a string.  String 
WKB (読み取り専用)  Returns the wellknown binary (WKB) representation for OGC geometry. It provides a portable representation of a geometry value as a contiguous stream of bytes.  Bytearray 
WKT (読み取り専用)  Returns the wellknown text (WKT) representation for OGC geometry. It provides a portable representation of a geometry value as a text string. Any true curves in the geometry will be densified into approximate curves in the WKT string.  String 
area (読み取り専用)  The area of a polygon feature. It is zero for all other feature types.  Double 
centroid (読み取り専用)  The true centroid if it is within or on the feature; otherwise, the label point is returned.  Point 
extent (読み書き)  The extent of the geometry.  Extent 
firstPoint (読み取り専用)  The first coordinate point of the geometry.  Point 
hullRectangle (読み取り専用)  A spacedelimited string of the coordinate pairs of the convex hull rectangle.  String 
isMultipart (読み取り専用)  Returns True if the number of parts for this geometry is more than one.  Boolean 
labelPoint (読み取り専用)  The point at which the label is located. The labelPoint is always located within or on a feature.  Point 
lastPoint (読み取り専用)  The last coordinate of the feature.  Point 
length (読み取り専用)  The length of the linear feature. It is zero for point and multipoint feature types.  Double 
length3D (読み取り専用)  The 3D length of the linear feature. It is zero for point and multipoint feature types.  Double 
partCount (読み取り専用)  The number of geometry parts for the feature.  Integer 
pointCount (読み取り専用)  The total number of points for the feature.  Integer 
spatialReference (読み取り専用)  The spatial reference of the geometry.  SpatialReference 
trueCentroid (読み取り専用)  The center of gravity for a feature.  Point 
type (読み取り専用)  The geometry type: polygon, polyline, point, multipoint, multipatch, dimension, or annotation.  String 
手法の概要
手法  説明 
angleAndDistanceTo (other, {method})  Returns a tuple of angle and distance to a point or polygon. 
boundary ()  Constructs the boundary of the geometry. 
buffer (distance)  Constructs a polygon at a specified distance from the geometry. 
clip (envelope)  Constructs the intersection of the geometry and the specified extent. 
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. 
convexHull ()  Constructs the geometry that is the minimal bounding polygon such that all outer angles are convex. 
crosses (second_geometry)  Indicates if 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 an polygon cross if they share a polyline or a point (for vertical line) in common on the interior of the polygon which is not equivalent to the entire polyline. Only True relationships are shown in this illustration. 
cut (cutter)  Splits this geometry into a part left of the cutting polyline, and a part right of it. When a polyline or polygon is cut, it is split where it intersects the cutter polyline. Each piece is classified as left of or right of the cutter. This classification is based on the orientation of the cutter line. Parts of the target polyline that do not intersect the cutting polyline are returned as part of the right of result for that input polyline. If a geometry is not cut, the left geometry will be empty (None). 
densify (type, distance, deviation)  Creates a new geometry with added vertices. 
difference (other)  Constructs the geometry that is composed only of the region unique to the base geometry but not part of the other geometry. The following illustration shows the results when the red polygon is the source geometry. 
disjoint (second_geometry)  Indicates if the base and comparison geometries share no points in common. Two geometries intersect if disjoint returns False. Only True relationships are shown in this illustration. 
distanceTo (other)  Returns the minimum distance between two geometries. The distance is in the units of the geometry's spatial reference. If the geometries intersect, the minimum distance is 0. Both geometries must have the same projection. 
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. 
generalize (max_offset)  Creates a new simplified geometry using a specified maximum offset tolerance. 
getArea ({type}, {units})  Returns the area of the feature using a measurement type. 
getLength ({measurement_type}, {units})  Returns the length of the feature using a measurement type. 
getPart ({index})  Returns an Array object of Point objects for a particular part of the geometry if an index is specified. If an index is not specified, an Array object containing an Array of Point objects for each geometry part is returned. The getPart method is equivalent to indexing an object; that is, obj.getPart(0) is equivalent to obj[0]. 
intersect (other, dimension)  Constructs a geometry that is the geometric intersection of the two input geometries. Different dimension values can be used to create different shape types. The intersection of two geometries of the same shape type is a geometry containing only the regions of overlap between the original geometries. For faster results, test if the two geometries are disjoint before calling intersect. 
measureOnLine (in_point, {use_percentage})  Returns a measure from the start point of this line to the in_point. 
overlaps (second_geometry)  Indicates if 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. 
pointFromAngleAndDistance (angle, distance, {method})  Returns a point at a given angle in degrees and distance in the units of the geometry's spatial reference using the specified measurement type. 
positionAlongLine (value, {use_percentage})  Returns a point on a line at a specified distance from the beginning of the line. 
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 mvalues are not changed by the projectAs method. 
queryPointAndDistance (in_point, {as_percentage})  Finds the point on the polyline nearest to the in_point and the distance between those points. Also returns information about the side of the line the in_point is on as well as the distance along the line where the nearest point occurs. 
segmentAlongLine (start_measure, end_measure, {use_percentage})  Returns a Polyline between start and end measures. Similar to Polyline.positionAlongLine but will return a polyline segment between two points on the polyline instead of a single point. 
snapToLine (in_point)  Returns a new point based on in_point snapped to this geometry. 
symmetricDifference (other)  Constructs the geometry that is the union of two geometries minus the instersection of those geometries. The two input geometries must be the same shape type. 
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. 
union (other)  Constructs the geometry that is the settheoretic union of the input geometries. The two geometries being unioned must be the same shape type. 
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. 
手法
angleAndDistanceTo (other, {method})
パラメーター  説明  データ タイプ 
other  The second geometry. If the geometry is a polygon, the distance is measured to the centroid of the polygon.  PointGeometry 
method  The method used to measure distance. The PLANAR measurement reflects the projection of geographic data onto a 2D surface, and does not account for the curvature of the earth.
(デフォルト値は次のとおりです GEODESIC)  String 
戻り値
データ タイプ  説明 
tuple  Returns a tuple of angle (in degrees) and distance (in meters) to another point. 
boundary ()
戻り値
データ タイプ  説明 
Object  A polygon's boundary is a polyline. A polyline's boundary is a multipoint, corresponding to the endpoints of the line. A point or multipoint's boundary is an empty point or multipoint. 
buffer (distance)
パラメーター  説明  データ タイプ 
distance  The buffer distance. The buffer distance is in the same units as the geometry that is being buffered. A negative distance can only be specified against a polygon geometry.  Double 
戻り値
データ タイプ  説明 
Polygon  The buffered polygon geometry. 
clip (envelope)
パラメーター  説明  データ タイプ 
envelope  An Extent object used to define the clip extent.  Extent 
戻り値
データ タイプ  説明 
Object  An output geometry clipped to the specified extent. 
contains (second_geometry, {relation})
パラメーター  説明  データ タイプ 
second_geometry  A second geometry.  Object 
relation  The spatial relationship type.
(デフォルト値は次のとおりです None)  String 
戻り値
データ タイプ  説明 
Boolean 
A return Boolean value of True indicates this geometry contains the second geometry. 
convexHull ()
戻り値
データ タイプ  説明 
Object  The resulting geometry. The convex hull of a single point is the point itself. 
crosses (second_geometry)
パラメーター  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  A return Boolean value of True indicates the two geometries intersect in a geometry of a lesser shape type. 
cut (cutter)
パラメーター  説明  データ タイプ 
cutter  The cutting polyline geometry.  PolyLine 
戻り値
データ タイプ  説明 
Geometry  A list of two geometries. 
densify (type, distance, deviation)
パラメーター  説明  データ タイプ 
type  The type of densification, DISTANCE, ANGLE, or GEODESIC.
 String 
distance  The maximum distance between vertices. The actual distance between vertices will usually be less than the maximum distance as new vertices will be evenly distributed along the original segment. If using a type of DISTANCE or ANGLE, the distance is measured in the units of the geometry's spatial reference. If using a type of GEODESIC, the distance is measured in meters.  Double 
deviation  Densify uses straight lines to approximate curves. You use deviation to control the accuracy of this approximation. The deviation is the maximum distance between the new segment and the original curve. The smaller its value, the more segments will be required to approximate the curve. If using a type of DISTANCE, the deviation is measured in the units of the geometry's spatial reference. If using a type of ANGLE, the deviation is measured in radians. If using a type of GEODESIC, the deviation is not used.  Double 
戻り値
データ タイプ  説明 
Geometry  The densified geometry. 
difference (other)
パラメーター  説明  データ タイプ 
other  A second geometry.  Object 
戻り値
データ タイプ  説明 
Object  The resulting geometry. 
disjoint (second_geometry)
パラメーター  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  A return Boolean value of True indicates that the two geometries share no points in common. 
distanceTo (other)
パラメーター  説明  データ タイプ 
other  A second geometry.  Object 
戻り値
データ タイプ  説明 
Double  The distance between the two geometries. 
equals (second_geometry)
パラメーター  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 
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. 
generalize (max_offset)
パラメーター  説明  データ タイプ 
max_offset  The maximum offset tolerance.  Double 
戻り値
データ タイプ  説明 
Geometry  The generalized geometry. 
getArea ({type}, {units})
パラメーター  説明  データ タイプ 
type  PLANAR measurements reflect the projection of geographic data onto the 2D surface (in other words, they will not take into account the curvature of the earth). GEODESIC, GREAT_ELLIPTIC, LOXODROME, and PRESERVE_SHAPE measurement types may be chosen as an alternative, if desired.
(デフォルト値は次のとおりです GEODESIC)  String 
units  The units in which the area will be calculated.
 String 
戻り値
データ タイプ  説明 
Double  The area of the feature. By default, for Projected coordinate systems, area will be returned in the units of the coordinate system, and for Geographic coordinate systems, area will be returned in square meters. 
getLength ({measurement_type}, {units})
パラメーター  説明  データ タイプ 
measurement_type  PLANAR measurements reflect the projection of geographic data onto the 2D surface (in other words, they will not take into account the curvature of the earth). GEODESIC, GREAT_ELLIPTIC, LOXODROME, and PRESERVE_SHAPE measurement types may be chosen as an alternative, if desired.
(デフォルト値は次のとおりです GEODESIC)  String 
units  The units in which the length will be calculated.
 String 
戻り値
データ タイプ  説明 
Double  The length of the feature. By default, for Projected coordinate systems, length will be returned in the units of the coordinate system, and for Geographic coordinate systems, length will be returned in square meters. 
getPart ({index})
パラメーター  説明  データ タイプ 
index  The index position of the geometry.  Integer 
戻り値
データ タイプ  説明 
Array  The resultant Array object. 
intersect (other, dimension)
パラメーター  説明  データ タイプ 
other  The second geometry.  Object 
dimension  The topological dimension (shape type) of the resulting geometry.
 Integer 
戻り値
データ タイプ  説明 
Object  A new geometry (point, multipoint, polyline, or polygon) that is the geometric intersection of the two input geometries. 
measureOnLine (in_point, {use_percentage})
パラメーター  説明  データ タイプ 
in_point  A point (PointGeometry or Point) that is used to measure from the start point of the polyline.  PointGeometry 
use_percentage  If False, the measure will be returned as a distance; if True, the measure will be returned as a percentage. (デフォルト値は次のとおりです False)  Boolean 
戻り値
データ タイプ  説明 
Double  A distance or percentage. 
overlaps (second_geometry)
パラメーター  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  A return Boolean value of True indicates the intersection of the two geometries has the same dimension as one of the input geometries. 
pointFromAngleAndDistance (angle, distance, {method})
パラメーター  説明  データ タイプ 
angle  The angle in degrees to the returned point.  Double 
distance  The distance in the units of the geometry's spatial reference to the returned point.  Double 
method  PLANAR measurements reflect the projection of geographic data onto the 2D surface (in other words, they will not take into account the curvature of the earth). GEODESIC, GREAT_ELLIPTIC, LOXODROME, or PRESERVE_SHAPE measurement types can be chosen as an alternative if desired.
(デフォルト値は次のとおりです GEODESIC)  String 
戻り値
データ タイプ  説明 
PointGeometry  Returns a point at a given angle and distance in degrees and meters. 
positionAlongLine (value, {use_percentage})
パラメーター  説明  データ タイプ 
value  The distance along the line. If the distance is less than zero, then the starting point of the line will be returned; if the distance is greater than the length of the line, then the end point of the line will be returned.  Double 
use_percentage  The distance may be specified as a fixed unit of measure or a ratio of the length of the line. If True, value is used as a percentage; if False, value is used as a distance. For percentages, the value should be expressed as a double from 0.0 (0%) to 1.0 (100%). (デフォルト値は次のとおりです False)  Boolean 
戻り値
データ タイプ  説明 
PointGeometry  The point on the line at a specified distance from the beginning of the line. 
projectAs (spatial_reference, {transformation_name})
パラメーター  説明  データ タイプ 
spatial_reference  The new spatial reference. This can be a SpatialReference object or the coordinate system name.  SpatialReference 
transformation_name  The geotransformation name.  String 
戻り値
データ タイプ  説明 
Object  The projected geometry. 
queryPointAndDistance (in_point, {as_percentage})
パラメーター  説明  データ タイプ 
in_point  The input point (PointGeometry or Point).  PointGeometry 
as_percentage  If False, the measure will be returned as a distance; if True, the measure will be returned as a percentage. (デフォルト値は次のとおりです False)  Boolean 
戻り値
データ タイプ  説明 
tuple  Returns a tuple that includes the following:

segmentAlongLine (start_measure, end_measure, {use_percentage})
パラメーター  説明  データ タイプ 
start_measure  The starting distance from the beginning of the line.  Double 
end_measure  The ending distance from the beginning of the line.  Double 
use_percentage  The start and end measures may be specified as fixed units or as a ratio. If True, start_measure and end_measure are used as a percentage; if False, start_measure and end_measure are used as a distance. For percentages, the measures should be expressed as a double from 0.0 (0 percent) to 1.0 (100 percent). (デフォルト値は次のとおりです False)  Boolean 
戻り値
データ タイプ  説明 
PolyLine  The segment of the line between two points. 
snapToLine (in_point)
パラメーター  説明  データ タイプ 
in_point  A point (PointGeometry or Point) to be snapped to the line.  PointGeometry 
戻り値
データ タイプ  説明 
PointGeometry  The snapped point. 
symmetricDifference (other)
パラメーター  説明  データ タイプ 
other  A second geometry.  Object 
戻り値
データ タイプ  説明 
Object  The resulting geometry. 
touches (second_geometry)
パラメーター  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  A return Boolean value of True indicates the boundaries of the geometries intersect. 
union (other)
パラメーター  説明  データ タイプ 
other  A second geometry.  Object 
戻り値
データ タイプ  説明 
Object  The resulting geometry. 
within (second_geometry, {relation})
パラメーター  説明  データ タイプ 
second_geometry  A second geometry.  Object 
relation  The spatial relationship type.
(デフォルト値は次のとおりです None)  String 
戻り値
データ タイプ  説明 
Boolean  A return Boolean value of True indicates this geometry is contained within the second geometry. 
コードのサンプル
Geometry example
When you set the output parameter of a geoprocessing tool to an empty Geometry object, the tool will return a list of Geometry objects.
import arcpy
# Run the Copy Features tool, setting the output to the geometry object.
# geometries is returned as a list of geometry objects.
geometries = arcpy.CopyFeatures_management("c:/data/streets.shp",
arcpy.Geometry())
# Walk through each geometry, totaling the length
length = 0
for geometry in geometries:
length += geometry.length
print("Total length: {0}".format(length))