 All Implemented Interfaces:
JsonSerializable
 Direct Known Subclasses:
Envelope
,Multipart
,Multipoint
,Point
Geometry
is the base class for twodimensional (x,y) or threedimensional (x,y,z) geometries. Objects that
inherit from the Geometry
class may also include a measure (m value) for each vertex. The Geometry
class provides functionality common to all types of geometry. Point
, Multipoint
, Polyline
,
Polygon
, and Envelope
all inherit from Geometry
and represent different types of shapes.
Geometry
represents realworld objects by defining a shape at a specific geographic location. It is used
throughout this API to represent the shapes of features and graphics, layer extents, viewpoints, and GPS locations.
It is also used, for example, to define inputs and outputs for spatial analysis and geoprocessing operations and
to measure distances and areas.
All types of geometry:
 Have a
SpatialReference
indicating the coordinate system used by its coordinates.  Can be empty, indicating that they have no specific location or shape.
 May have z values and/or m values to define elevation and measures respectively.
 Can be converted to and from JSON to be persisted or to be exchanged directly with REST services.
Immutability
Most geometries are created and not changed for their lifetime. Examples include features created to be stored in a geodatabase or read from a noneditable layer, and features returned from tasks such as a spatial query, geocode operation, network trace, or geoprocessing task. Immutable geometries (geometries that cannot be changed) offer some important benefits to your app. They are inherently threadsafe, help prevent inadvertent changes, and allow for certain performance optimizations.
Instead of changing the properties of existing geometries, you can create and update geometries
using the various subclasses of GeometryBuilder
(for example, PolylineBuilder
, which can
represent the state of a geometry under construction while allowing modifications, thus enabling
editing workflows.
Additionally, GeometryEngine
offers a range of topological and spatial
transformations that read the content of existing geometries and create new geometries, for example, project,
move, scale, rotate, buffer, union, and so on. Relational tests such as intersects and overlaps are also available on
GeometryEngine
.
Coordinate units
The coordinates that define a geometry are only meaningful in the context of the geometry's SpatialReference
.
The vertices and spatial reference together allow your app to translate a realworld object from its location on
the Earth to its location on your map or scene.
In some cases, a geometry's spatial reference may not be set. For example, a Graphic
that does not have a spatial
reference is drawn using the same spatial reference as the MapView
to which it was added. If the coordinates
are in a different spatial reference, the graphics may not display in the correction location, or at all.
When using
GeometryBuilder
to create a Polyline
or Polygon
from a collection of Point
, you
don't need to set the spatial reference of every point before you add it to the builder, as it will be assigned
the spatial reference of the builder itself. In most other cases, such as when using a geometry in geometry
operations or when editing a feature table, getSpatialReference()
must return a valid spatial reference.
Spatial reference and projection
Changing the coordinates of a geometry to have the same shape and location represented using a different
SpatialReference
is known as "projection" or sometimes as "reprojection". Because geometries are immutable,
they do not have any member methods that project, transform, or otherwise modify their content.

Constructor Summary

Method Summary
Modifier and TypeMethodDescriptionboolean
Checks if a given geometry is equal to this one within a given tolerance.boolean
Tests if this object is equal to a second Geometry object.static Geometry
Creates a new Geometry from an ArcGIS JSON geometry representation.static Geometry
fromJson
(String json, SpatialReference spatialReference) Creates a new Geometry from an ArcGIS JSON geometry representation, and the given SpatialReference.Gets the dimension of this Geometry, relating to the number of spatial dimensions in which the geometry may have a size.Gets an Envelope representing the spatial extent of this Geometry, the smallest Envelope that completely contains the Geometry.Gets the type of this Geometry, indicating the subclass, and the type of geometrical shape it can represent.Gets the SpatialReference of this Geometry.A Geometry never has any unknown JSON so this returns an empty Map.A Geometry never has any unsupported JSON so this returns an empty Map.boolean
Indicates if this Geometry contains Segments that represent true curves.int
hashCode()
Generates a hash value from the Geometry.boolean
hasM()
Indicates if this Geometry has m values.boolean
hasZ()
Indicates if this Geometry has z values.boolean
isEmpty()
Indicates if this Geometry is empty.toJson()
Returns an ArcGIS JSON geometry representation of this Geometry.

Constructor Details

Geometry
public Geometry()


Method Details

fromJson
Creates a new Geometry from an ArcGIS JSON geometry representation.See the ArcGIS REST API help topic on Geometry objects for more information.
 Parameters:
json
 a string containing an ArcGIS JSON representation of a geometry Returns:
 a new Geometry constructed from the
json
string, or null if a geometry couldn't be constructed  Throws:
IllegalArgumentException
 if json is null or empty Since:
 100.0.0

fromJson
Creates a new Geometry from an ArcGIS JSON geometry representation, and the given SpatialReference.Geometry
can be serialized and deserialized to and from JSON. The ArcGIS REST API documentation describes the JSON representation of geometry objects. You can use this encoding and decoding mechanism to exchange geometries with REST Web services or to store them in text files.Any SpatialReference defined in the JSON representation will be ignored in favor of the
spatialReference
parameter of this method. Parameters:
json
 a string containing an ArcGIS JSON representation of a geometryspatialReference
 a SpatialReference to assign to the new geometry Returns:
 a new Geometry constructed from the
json
string, or null if a geometry couldn't be constructed  Throws:
IllegalArgumentException
 if json is null or empty Since:
 100.0.0

getSpatialReference
Gets the SpatialReference of this Geometry. TheSpatialReference
of a Geometry defines how the coordinates of the Geometry correspond to locations in the real world. Returns:
 the SpatialReference of this Geometry
 Since:
 100.0.0

getDimension
Gets the dimension of this Geometry, relating to the number of spatial dimensions in which the geometry may have a size. Returns:
 the dimension of this Geometry
 Since:
 100.0.0

getExtent
Gets an Envelope representing the spatial extent of this Geometry, the smallest Envelope that completely contains the Geometry.If the Geometry has
z values
andm values
, these will be reflected in the properties of the returned Envelope. For anempty
Geometry, the extent Envelope will also be empty. For aPoint
geometry, the extent will have zero width and height. Returns:
 the extent of this Geometry
 Since:
 100.0.0

getGeometryType
Gets the type of this Geometry, indicating the subclass, and the type of geometrical shape it can represent. Returns:
 the type of this Geometry
 Since:
 100.0.0

hasM
public boolean hasM()Indicates if this Geometry has m values. M values are often referred to as measures, and are used in linear referencing workflows on linear datasets. NaN is a valid m value.If true, m values are stored for each vertex of the Geometry. Geometries with m values are created by using setters or constructors that take an m value as a parameter.
Feature classes define whether their geometries have m values or not. When developing an editing workflow, you must ensure that this value matches that of the feature class in which the Geometry will be stored. The removeZ, removeM, and removeZAndM methods of
GeometryEngine
can be used to create new geometries without z and m value from existing geometries that have the values. See the ArcGIS Desktop help topic Defining feature class properties for more information. Returns:
 true if this Geometry has m values; false otherwise
 Since:
 100.0.0
 See Also:

hasZ
public boolean hasZ()Indicates if this Geometry has z values. Z values are generally used as a z coordinate, indicating height or elevation. NaN is a valid z value.If true, z values are stored for each vertex of the Geometry. Geometries with z values are created by using setters or constructors that take a z value as a parameter.
Feature classes define whether their geometries have z values or not. When developing an editing workflow, you must ensure that this value matches that of the feature class in which the Geometry will be stored. The removeZ, removeM, and removeZAndM methods of
GeometryEngine
can be used to create new geometries without z value and m value from existing geometries that have the values. See the ArcGIS Desktop help topic Defining feature class properties for more information. Returns:
 true if this Geometry has z values; false otherwise
 Since:
 100.0.0
 See Also:

hasCurves
public boolean hasCurves()Indicates if this Geometry contains Segments that represent true curves.ArcGIS software supports polygon and polyline geometries that contain curve segments (sometimes known as true curves or nonlinear segments). Curves may be present in certain types of data  for example Mobile Map Packages (MMPK), or geometry JSON. When connecting to ArcGIS feature services that support curves, this API retrieves densified versions of curve feature geometries by default.
If a polygon or polyline geometry contains curve segments, this property returns true. Prior to v100.12, it was not possible to access curve segments, and only
LineSegment
instances would be returned when iterating through the segments in aPolygon
orPolyline
object, irrespective of this property; In editing workflows, use this method to determine if this geometry contains curve information which would be lost if used in an editing workflow.From v100.12, you can use curve segments when using a
MultipartBuilder
to create or edit polygon and polyline geometries, and also get curve segments when iterating through the segments of existingMultipart
geometries when this property returns true. Returns:
 true if this Geometry contains curved segments; false otherwise
 Since:
 100.0.0
 See Also:

isEmpty
public boolean isEmpty()Indicates if this Geometry is empty. An empty Geometry is a valid object, but has no location in space.For an empty Geometry,
hasZ()
andhasM()
return false, andgetExtent()
returns an empty Envelope. Returns:
 true if this Geometry is empty; false otherwise
 Since:
 100.0.0

toJson
Returns an ArcGIS JSON geometry representation of this Geometry.See the ArcGIS REST API help topic on Geometry objects for more information.
 Specified by:
toJson
in interfaceJsonSerializable
 Returns:
 a string containing the JSON representation of this geometry
 Since:
 100.0.0

getUnknownJson
A Geometry never has any unknown JSON so this returns an empty Map. Specified by:
getUnknownJson
in interfaceJsonSerializable
 Returns:
 an empty unmodifiable Map
 Since:
 100.0.0

getUnsupportedJson
A Geometry never has any unsupported JSON so this returns an empty Map. Specified by:
getUnsupportedJson
in interfaceJsonSerializable
 Returns:
 an empty unmodifiable Map
 Since:
 100.0.0

hashCode
public int hashCode()Generates a hash value from the Geometry. 
equals
Tests if this object is equal to a second Geometry object.This method is more stringent than the
GeometryEngine.equals(Geometry, Geometry)
method, as in addition to these checks, this method checks that each vertex in a Multipoint or Multipart geometry is in the same order; parts of Multiparts must also begin and end at the same Point. 
equals
Checks if a given geometry is equal to this one within a given tolerance.This method performs a lightweight comparison of the geometries, such as might be useful when writing test code. It uses the tolerance to compare each of x, y, and any other values the geometries possess (such as z or m) independently in the manner:
abs(value1  value2) <= tolerance
.Returns true if the difference of each is within the tolerance and all other properties of the geometries are exactly equal (spatial reference, vertex count, etc.). A single tolerance is used even if the units for the horizontal coordinates and other values differ, for example horizontal coordinates in degrees and vertical coordinates in meters.
This method does not respect modular arithmetic of spatial references which wrap around, so longitudes of 180 and +180 degrees are considered to differ by 360 degrees.
 Parameters:
geometry
 the geometry to checktolerance
 the tolerance Returns:
 true if the geometries are equal, within the tolerance, otherwise false
 Since:
 100.1.0
 See Also:
