Package oracle.spatial.geometry

Class CoordSysInfo

java.lang.Object

oracle.spatial.geometry.CoordSysInfo

All Implemented Interfaces:

java.io.Serializable

public class CoordSysInfo
extends java.lang.Object
implements java.io.Serializable

Immutable, thread-safe class that stores simplified coordinate system information.

Spherical coordinate systems return an inverse flattening of POSITIVE_INFINITY. Projected coordinate systems return NaN for semi-major axis and inverse flattening.

This class knows the geodetic coordinate systems distributed with the Oracle database; any other SRID is treated as projected by default.

SRID values can be customized before first use, overriding the database defaults. Once used, the definition of a SRID can not be changed.

Since:

12.2

See Also:

Serialized Form

Method Summary

Modifier and Type	Method	Description
static CoordSysInfo	createCoordSysInfo(int srid)	Define a SRID to be a projected coordinate system, overriding the default values.
static CoordSysInfo	createCoordSysInfo(int srid, double smax, double iflat)	Define a SRID to be a geodetic coordinate system (longitude/latitude), overriding the default values.
double	defaultTolerance()	Returns a suitable tolerance for use with this coordinate system.
boolean	equals(java.lang.Object obj)
static CoordSysInfo	getCoordsys(int srid)	Return the CoordSysInfo for the given SRID.
int	hashCode()
double	iflat()
boolean	isGeodetic()
protected java.lang.Object	readResolve()
double	smax()
int	srid()

Methods inherited from class java.lang.Object

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

Method Detail

srid

public int srid()

isGeodetic

public boolean isGeodetic()

smax

public double smax()

iflat

public double iflat()

defaultTolerance

public double defaultTolerance()

Returns a suitable tolerance for use with this coordinate system.

Returns:

an appropriate tolerance value.

createCoordSysInfo

public static CoordSysInfo createCoordSysInfo(int srid)

Define a SRID to be a projected coordinate system, overriding the default values. SRIDs can not be changed after definition. Definition must happen before first use of the SRID. SRID 0 can not be changed.

Parameters:

srid - SRID of projected coordinate system.

Returns:

the defined coordinate system (also remembered internally)

createCoordSysInfo

public static CoordSysInfo createCoordSysInfo(int srid,
                                              double smax,
                                              double iflat)

Define a SRID to be a geodetic coordinate system (longitude/latitude), overriding the default values. SRIDs can not be changed after definition. Definition must happen before first use of the SRID. SRID 0 can not be changed.

Parameters:

srid - SRID of a geodetic coordinate system.

smax - semi-major axis of ellipsoid

iflat - inverse flattening

Returns:

the defined coordinate system (also remembered inernally)

getCoordsys

public static CoordSysInfo getCoordsys(int srid)

Return the CoordSysInfo for the given SRID.

Parameters:

srid - the SRID to search for

Returns:

coordinate system information

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

readResolve

protected java.lang.Object readResolve()
                                throws java.io.ObjectStreamException

Throws:

java.io.ObjectStreamException