Class Geometry
 java.lang.Object

 com.esri.arcgisruntime.geometry.Geometry

 All Implemented Interfaces:
JsonSerializable
 Direct Known Subclasses:
Envelope
,Multipart
,Multipoint
,Point
public abstract class Geometry extends java.lang.Object implements JsonSerializable
Base class for all classes that represent geometric shapes.Geometry
is the base class for twodimensional (x,y) or threedimensional (x,y,z) geometries. Objects that inherit from theGeometry
class may also include a measure (m value) for each vertex. TheGeometry
class provides functionality common to all types of geometry.Point
,Multipoint
,Polyline
,Polygon
, andEnvelope
all inherit fromGeometry
and represent different types of shapes.Geometry
represents realworld objects by defining a shape at a specific geographic location. It is used throughout the 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 relational operations 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.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 theMapView
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 aPolyline
orPolygon
from a collection ofPoint
, 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
Constructors Constructor Description Geometry()

Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(Geometry geometry, double tolerance)
Checks if a given geometry is equal to this one within a given tolerance.boolean
equals(java.lang.Object obj)
static Geometry
fromJson(java.lang.String json)
Creates a new Geometry from an ArcGIS JSON geometry representation.static Geometry
fromJson(java.lang.String json, SpatialReference spatialReference)
Creates a new Geometry from an ArcGIS JSON geometry representation, and the given SpatialReference.GeometryDimension
getDimension()
Gets the dimension of this Geometry, relating to the number of spatial dimensions in which the geometry may have a size.Envelope
getExtent()
Gets an Envelope representing the spatial extent of this Geometry, the smallest Envelope that completely contains the Geometry.GeometryType
getGeometryType()
Gets the type of this Geometry, indicating the subclass, and the type of geometrical shape it can represent.SpatialReference
getSpatialReference()
Gets the SpatialReference of this Geometry.java.util.Map<java.lang.String,java.lang.Object>
getUnknownJson()
A Geometry never has any unknown JSON so this returns an empty Map.java.util.Map<java.lang.String,java.lang.Object>
getUnsupportedJson()
A Geometry never has any unsupported JSON so this returns an empty Map.boolean
hasCurves()
Indicates if this Geometry contains Segments that represent true curves.int
hashCode()
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.java.lang.String
toJson()
Returns an ArcGIS JSON geometry representation of this Geometry.



Method Detail

fromJson
public static Geometry fromJson(java.lang.String json)
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:
java.lang.IllegalArgumentException
 if json is null or empty Since:
 100.0.0

fromJson
public static Geometry fromJson(java.lang.String json, SpatialReference spatialReference)
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:
java.lang.IllegalArgumentException
 if json is null or empty Since:
 100.0.0

getSpatialReference
public SpatialReference 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
public GeometryDimension 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
public Envelope 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
public GeometryType 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()
,GeometryEngine.removeM(Geometry)
,GeometryEngine.removeZ(Geometry)
,GeometryEngine.removeZAndM(Geometry)

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:
hasM()
,GeometryEngine.removeM(Geometry)
,GeometryEngine.removeZ(Geometry)
,GeometryEngine.removeZAndM(Geometry)

hasCurves
public boolean hasCurves()
Indicates if this Geometry contains Segments that represent true curves.The ArcGIS system supports polygon and polyline geometries that contain curved segments in some types of data, for example geodatabases, feature services, and JSON. At the current release this SDK can display curved geometries, but you cannot work with curves using the API; any curved segments in a geometry will be represented as
LineSegments
, and the curve information will be lost. In editing workflows, use this method to determine if this geometry contains curve information which would be lost if used in an editing workflow. Returns:
 true if this Geometry contains curved segments; false otherwise
 Since:
 100.0.0

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
public java.lang.String 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
public java.util.Map<java.lang.String,java.lang.Object> 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
public java.util.Map<java.lang.String,java.lang.Object> 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()
 Overrides:
hashCode
in classjava.lang.Object

equals
public boolean equals(java.lang.Object obj)
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. Overrides:
equals
in classjava.lang.Object

equals
public boolean equals(Geometry geometry, double tolerance)
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:
equals(Object)

