Package org.apache.sedona.common.sphere

Class Spheroid

java.lang.Object

org.apache.sedona.common.sphere.Spheroid

public class Spheroid
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final int	EPSG_NORTH_LAMBERT
static final int	EPSG_NORTH_STEREO
static final int	EPSG_NORTH_UTM_END
static final int	EPSG_NORTH_UTM_START
static final int	EPSG_SOUTH_LAMBERT
static final int	EPSG_SOUTH_STEREO
static final int	EPSG_SOUTH_UTM_END
static final int	EPSG_SOUTH_UTM_START
static final int	EPSG_WORLD_MERCATOR

Constructor Summary

Constructors

Constructor	Description
Spheroid()

Method Summary

Modifier and Type	Method	Description
static Double	angularHeight(org.locationtech.jts.geom.Envelope envelope)
static Double	angularWidth(org.locationtech.jts.geom.Envelope envelope)
static double	area(org.locationtech.jts.geom.Geometry geom)	Calculate the area of a geometry using the Spheroid formula.
static double	baseLength(org.locationtech.jts.geom.Geometry geom)	Base function to calculate the spheroid length/perimeter
static double	distance(org.locationtech.jts.geom.Geometry geom1, org.locationtech.jts.geom.Geometry geom2)	Calculate the distance between two points on the earth using the Spheroid formula.
static double	length(org.locationtech.jts.geom.Geometry geometry)	Calculates length just for linear geometries or geometry collection containing linear geometries.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

EPSG_WORLD_MERCATOR

public static final int EPSG_WORLD_MERCATOR

See Also:

• Constant Field Values

EPSG_NORTH_UTM_START

public static final int EPSG_NORTH_UTM_START

See Also:

• Constant Field Values

EPSG_NORTH_UTM_END

public static final int EPSG_NORTH_UTM_END

See Also:

• Constant Field Values

EPSG_NORTH_LAMBERT

public static final int EPSG_NORTH_LAMBERT

See Also:

• Constant Field Values

EPSG_NORTH_STEREO

public static final int EPSG_NORTH_STEREO

See Also:

• Constant Field Values

EPSG_SOUTH_UTM_START

public static final int EPSG_SOUTH_UTM_START

See Also:

• Constant Field Values

EPSG_SOUTH_UTM_END

public static final int EPSG_SOUTH_UTM_END

See Also:

• Constant Field Values

EPSG_SOUTH_LAMBERT

public static final int EPSG_SOUTH_LAMBERT

See Also:

• Constant Field Values

EPSG_SOUTH_STEREO

public static final int EPSG_SOUTH_STEREO

See Also:

• Constant Field Values

Constructor Details

Spheroid

public Spheroid()

Method Details

distance

public static double distance(org.locationtech.jts.geom.Geometry geom1,
 org.locationtech.jts.geom.Geometry geom2)

Calculate the distance between two points on the earth using the Spheroid formula. This algorithm does not use the radius of the earth, but instead uses the WGS84 ellipsoid. This is similar to the Vincenty algorithm,but use the algorithm in C. F. F. Karney, Algorithms for geodesics, J. Geodesy 87(1), 43–55 (2013) It uses the implementation from GeographicLib so please expect a small difference This will produce almost identical result to PostGIS ST_DistanceSpheroid and PostGIS ST_Distance(useSpheroid=true)

Parameters:

geom1 -

geom2 -

Returns:

length

public static double length(org.locationtech.jts.geom.Geometry geometry)

Calculates length just for linear geometries or geometry collection containing linear geometries.

Parameters:

geometry -

Returns:

baseLength

public static double baseLength(org.locationtech.jts.geom.Geometry geom)

Base function to calculate the spheroid length/perimeter

Calculate the length of a geometry using the Spheroid formula. Equivalent to PostGIS ST_LengthSpheroid and PostGIS ST_Length(useSpheroid=true) WGS84 ellipsoid is used.

Parameters:

geom -

Returns:

area

public static double area(org.locationtech.jts.geom.Geometry geom)

Calculate the area of a geometry using the Spheroid formula. Equivalent to PostGIS ST_Area(useSpheroid=true) WGS84 ellipsoid is used.

Parameters:

geom -

Returns:

angularWidth

public static Double angularWidth(org.locationtech.jts.geom.Envelope envelope)

angularHeight

public static Double angularHeight(org.locationtech.jts.geom.Envelope envelope)