 All Implemented Interfaces:
JsonSerializable
Point
geometries represent discrete locations or entities, such as a geocoded house address, the location
of a water meter in a water utility network, a moving vehicle, and so on. Larger geographic entities (such as
cities) are often represented as points on smallscale maps. Points can be used as the geometry of features and
graphics and are often used to construct more complex geometries. They are also used in a Viewpoint
to
define the center of the display.
Points store a single set of x,y coordinates that define a location (longitude and latitude, for example), and a
SpatialReference
. Optionally, a z value (commonly used to describe elevation) and an m value can also be
defined.
For points defined with a geographic spatial reference, the x coordinate is the longitude (east or west), and the y coordinate is the latitude (north or south). When geographic coordinates are represented in strings, points are generally written using the form "(latitude, longitude)", where the y coordinate comes before the x coordinate. Latitude values south of the equator and longitude values west of the prime meridian are expressed as negative numbers.
Use CoordinateFormatter
to convert a latitude, longitude formatted string directly to a Point
, and
also return a latitude, longitude formatted string from an existing Point
. Other coordinate notations, such as
Military Grid Reference System (MGRS) and United States National Grid (USNG) are also supported.
The SpatialReference
of a Point
will be null if one is not set in its constructor; if subsequently
added to a PointCollection
, it will take on the SpatialReference
of that PointCollection
.
Point
is immutable. Instead of changing the properties of an existing Point
, create new
Point
instances, or use PointBuilder
.
A Point
can be used as the geometry of a Feature
or Graphic
, and also when setting the viewpoint
of a MapView
using
setViewpointGeometryAsync
or setViewpointCenterAsync
.
 Since:
 100.0.0
 See Also:

Constructor Summary
ConstructorDescriptionPoint
(double x, double y) Creates a new immutable Point with the given x and y coordinates.Point
(double x, double y, double z) Creates a new immutable Point with the given x,y coordinates and z value.Point
(double x, double y, double z, SpatialReference spatialReference) Creates a new immutable Point with the given x,y coordinates, z value, andSpatialReference
.Point
(double x, double y, SpatialReference spatialReference) Creates a new immutable Point with the given x,y coordinates and SpatialReference. 
Method Summary
Modifier and TypeMethodDescriptionstatic Point
createWithM
(double x, double y, double m) Creates a new immutable Point with the given x,y coordinates, and m value.static Point
createWithM
(double x, double y, double z, double m) Creates a new immutable Point with the given x,y coordinates, z value, and m value.static Point
createWithM
(double x, double y, double z, double m, SpatialReference spatialReference) Creates a new immutable Point with the given x,y coordinates, z value, m value, andSpatialReference
.static Point
createWithM
(double x, double y, double m, SpatialReference spatialReference) Creates a new immutable Point with the given x,y coordinates, m value, and SpatialReference.boolean
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.Gets the dimension of this Geometry, relating to the number of spatial dimensions in which the geometry may have a size.Gets the type of this Geometry, indicating the subclass, and the type of geometrical shape it can represent.double
getM()
Gets the m value of this Point.double
getX()
Gets the x coordinate of this Point.double
getY()
Gets the y coordinate of this Point.double
getZ()
Gets the z value of thisPoint
Point.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.toString()
Returns a string representation of this Point instance.Methods inherited from class com.esri.arcgisruntime.geometry.Geometry
fromJson, fromJson, getExtent, getSpatialReference, getUnknownJson, getUnsupportedJson, hasCurves, isEmpty, toJson

Constructor Details

Point
public Point(double x, double y) Creates a new immutable Point with the given x and y coordinates. Parameters:
x
 the x coordinate of the new Pointy
 the y coordinate of the new Point Since:
 100.0.0

Point
Creates a new immutable Point with the given x,y coordinates and SpatialReference. Parameters:
x
 the x coordinate of the new Pointy
 the y coordinate of the new PointspatialReference
 the spatial reference of the new Point, and of thex
andy
parameters Since:
 100.0.0

Point
public Point(double x, double y, double z) Creates a new immutable Point with the given x,y coordinates and z value.The minimum z value is 6,356,752 meters, which is the approximate radius of the earth (the WGS 84 datum semiminor axis). The maximum z value is 55,000,000 meters.
 Parameters:
x
 the x coordinate of the new Pointy
 the y coordinate of the new Pointz
 the z value of the new Point Since:
 100.0.0

Point
Creates a new immutable Point with the given x,y coordinates, z value, andSpatialReference
.The minimum z value is 6,356,752 meters, which is the approximate radius of the earth (the WGS 84 datum semiminor axis). The maximum z value is 55,000,000 meters.
 Parameters:
x
 the x coordinate of the new Pointy
 the y coordinate of the new Pointz
 the z value of the new PointspatialReference
 the spatial reference of the new Point, and of thex
andy
parameters Since:
 100.0.0


Method Details

createWithM
Creates a new immutable Point with the given x,y coordinates, and m value. The new Point has a null SpatialReference. Parameters:
x
 the x coordinate of the new Pointy
 the y coordinate of the new Pointm
 the m value of the new Point Returns:
 new Point
 Since:
 100.0.0

createWithM
Creates a new immutable Point with the given x,y coordinates, m value, and SpatialReference. Parameters:
x
 the x coordinate of the new Pointy
 the y coordinate of the new Pointm
 the m value of the new PointspatialReference
 the spatial reference of the new Point, and of thex
andy
parameters Returns:
 new Point
 Since:
 100.0.0

createWithM
Creates a new immutable Point with the given x,y coordinates, z value, and m value. The new Point has a nullSpatialReference
.The minimum z value is 6,356,752 meters, which is the approximate radius of the earth (the WGS 84 datum semiminor axis). The maximum z value is 55,000,000 meters.
 Parameters:
x
 the x coordinate of the new Pointy
 the y coordinate of the new Pointz
 the z value of the new Pointm
 the m value of the new Point Returns:
 new Point
 Since:
 100.0.0

createWithM
public static Point createWithM(double x, double y, double z, double m, SpatialReference spatialReference) Creates a new immutable Point with the given x,y coordinates, z value, m value, andSpatialReference
.The minimum z value is 6,356,752 meters, which is the approximate radius of the earth (the WGS 84 datum semiminor axis). The maximum z value is 55,000,000 meters.
 Parameters:
x
 the x coordinate of the new Pointy
 the y coordinate of the new Pointz
 the z value of the new Pointm
 the m value of the new PointspatialReference
 the spatial reference of the new Point, and of thex
andy
parameters Returns:
 new Point
 Since:
 100.0.0

getX
public double getX()Gets the x coordinate of this Point. TheGeometry.getSpatialReference()
determines the coordinate units.If the SpatialReference is a geographic coordinate system, the x coordinate defines longitude, and the units will be angular.
 Returns:
 the x coordinate of this Point
 Since:
 100.0.0

getY
public double getY()Gets the y coordinate of this Point. TheGeometry.getSpatialReference()
determines the coordinate units.If the SpatialReference is a geographic coordinate system, the y coordinate defines latitude, and the units will be angular.
 Returns:
 the y coordinate of this Point
 Since:
 100.0.0

getZ
public double getZ()Gets the z value of thisPoint
Point.Geometries can have z values, indicating values along the zaxis, which is perpendicular to both the xaxis and yaxis. Z values indicate height above or depth below a surface, or an absolute elevation. For example, z values are used to draw the locations of geometries in a
SceneView
Note that geometries are not considered true 3D shapes and are draped onto surfaces in the view, or in some cases, drawn in a single plane by using z values. Z values are stored onPoint
andEnvelope
. SinceMultipoint
,Polyline
, andPolygon
are created from a collection ofPoint
, all types of geometry can have z values.Whether or not a geometry has z values is determined when the geometry is created; if you use a method that has a z value parameter, the new geometry will have z values (
Geometry.hasZ()
will be true). If you create geometries using constructors that take z value parameters, or if you pass into the constructor points or segments that have z values, the new geometry will have z values. AGeometry
with z values is sometimes known as a zaware geometry.It may be that not all vertices in your geometry have a z value defined. NAN is a valid z value used to indicate an unknown z value. However, the default z value is 0. When you get z values from a geometry that does not have z values, the default is 0. Check the
Geometry.hasZ()
to determine whether a z value of 0 means that there are no z values in the geometry or that the z value in the geometry's coordinates really is 0. Returns:
 the z value of this Point
 Since:
 100.0.0

getM
public double getM()Gets the m value of this Point. M values do not have specific units.M values are also known as measures. M values are used in linear referencing scenarios and may represent things like mile markers along a highway. Like z values, every geometry can optionally store m values with the point coordinates that comprise it. The default m value is NaN. If an m value is specified when a geometry is created, the new geometry will have m values (
Geometry.hasM()
will be true). Note that when you get m values back from a geometry, the default value of NAN is returned for vertices that do not have m values. A geometry with m values is sometimes known as an maware geometry. Returns:
 the m value of this Point
 Since:
 100.0.0

getDimension
Description copied from class:Geometry
Gets the dimension of this Geometry, relating to the number of spatial dimensions in which the geometry may have a size. Overrides:
getDimension
in classGeometry
 Returns:
 the dimension of this Geometry

getGeometryType
Description copied from class:Geometry
Gets the type of this Geometry, indicating the subclass, and the type of geometrical shape it can represent. Overrides:
getGeometryType
in classGeometry
 Returns:
 the type of this Geometry

equals
Description copied from class:Geometry
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
Description copied from class:Geometry
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.

hashCode
public int hashCode()Description copied from class:Geometry
Generates a hash value from the Geometry. 
toString
Returns a string representation of this Point instance. The format and content of this string is subject to change without notice.This value may be useful for debugging purposes, but cannot be relied upon for persistence purposes.

hasM
public boolean hasM()Description copied from class:Geometry
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. 
hasZ
public boolean hasZ()Description copied from class:Geometry
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.
