|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectorg.gicentre.utils.spatial.AlbersEqualAreaConic
public class AlbersEqualAreaConic
Class for representing Albers Equal Area Conic projections. Includes forward and inverse transforms from/to lat,long. Uses transformation equations from Snyder (1987) Atlas of Map Projections. Some code adapted from C program by T. Mittan, Feb, 1992 - see http://geography.usgs.gov/ftp/software/current_software/gctpc2/alberfor.c.
Field Summary | |
---|---|
static int |
FROM_LAT_LONG
Indicates a transformation from latitude/longitude |
static int |
TO_LAT_LONG
Indicates a transformation to latitude/longitude |
Constructor Summary | |
---|---|
AlbersEqualAreaConic(Ellipsoid ellipsoid,
double lat1,
double lat2)
Initialises the Albers converter with the given ellipsoid and standard parallels. |
|
AlbersEqualAreaConic(Ellipsoid ellipsoid,
double lat1,
double lat2,
double lon0,
double lat0,
double falseEast,
double falseNorth)
Initialises the Albers converter with the given ellipsoid. |
Method Summary | |
---|---|
processing.core.PVector |
AlbersToLatLong(processing.core.PVector p)
Converts the given coordinates that use the Albers equal area conic projection into a (longitude,latitude) location. |
boolean |
doInterpolation()
Indicates whether the transformation should use nearest neighbour (false) or some interpolator (true). |
java.lang.String |
getDescription()
Provides a general description of the transformation. |
Ellipsoid |
getEllipsoid()
Reports the ellipsoid used in the transformation. |
processing.core.PVector |
invTransformCoords(processing.core.PVector p)
Performs an inverse transformation (Albers to latitude/longitude) on the given location. |
processing.core.PVector |
latLongToAlbers(processing.core.PVector p)
Converts the given ( lng , lat ) coordinates into a location referenced
using the Albers equal area conic projection. |
void |
setInterpolation(boolean doInterpolation)
Sets whether the transformation should use nearest neighbour (false) or some interpolator (true). |
processing.core.PVector |
transformCoords(processing.core.PVector p)
Performs a forward transformation (latitude/longitude to Albers) on the given location. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
public static final int FROM_LAT_LONG
public static final int TO_LAT_LONG
Constructor Detail |
---|
public AlbersEqualAreaConic(Ellipsoid ellipsoid, double lat1, double lat2)
ellipsoid
- to use in projection.lat1
- First standard parallel in degrees (north of equator positive).lat2
- Second standard parallel in degrees (north of equator positive).public AlbersEqualAreaConic(Ellipsoid ellipsoid, double lat1, double lat2, double lon0, double lat0, double falseEast, double falseNorth)
ellipsoid
- to use in projection.lat1
- First standard parallel in degrees (north of equator positive).lat2
- Second standard parallel in degrees (north of equator positive).lon0
- Centre longitude in degrees (east of Greenwich positive).lat0
- Centre latitude in degrees (north of equator positive).falseEast
- False easting (offset in metres).falseNorth
- False northing (offset in metres).Method Detail |
---|
public processing.core.PVector transformCoords(processing.core.PVector p)
transformCoords
in interface MapProjection
p
- Location of point to transform.
public processing.core.PVector invTransformCoords(processing.core.PVector p)
invTransformCoords
in interface MapProjection
p
- Location of point to transform.
public java.lang.String getDescription()
getDescription
in interface MapProjection
public boolean doInterpolation()
public void setInterpolation(boolean doInterpolation)
doInterpolation
- True if transformation should perform some local interpolation.public processing.core.PVector latLongToAlbers(processing.core.PVector p)
lng
, lat
) coordinates into a location referenced
using the Albers equal area conic projection.
Latitude/longitude coordinates should be in decimal degrees with positive North and positive East.
p
- Longitude/latitude point. Longitude varies within +-180 degrees, latitude within +-90 degrees.
public processing.core.PVector AlbersToLatLong(processing.core.PVector p)
p
- Location of point as an easting and northing in the Albers projection (metres from local origin).
public Ellipsoid getEllipsoid()
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |