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java.lang.Objectorg.gicentre.utils.spatial.ObliqueMercator
public class ObliqueMercator
Class for representing Oblique Mercator projections. Includes forward and inverse transforms from and to longitude/latitude. Uses transformation equations from Snyder (1987) Atlas of Map Projections summarised at this Hotine Oblique Mercator page.
Field Summary | |
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static int |
FROM_LAT_LONG
Indicates a transformation from longitude/latitude |
static int |
TO_LAT_LONG
Indicates a transformation to longitude/latitude |
Constructor Summary | |
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ObliqueMercator(Ellipsoid ellipsoid)
Initialises the Oblique Mercator converter with the given ellipsoid. |
Method Summary | |
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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 Oblique Mercator to lat/long transform on the given location. |
processing.core.PVector |
latLongToObliqueMercator(processing.core.PVector p)
Converts the given ( lat ,lng ) coordinates into an oblique Mercator location. |
processing.core.PVector |
obliqueMercatorToLatLong(processing.core.PVector p)
Converts the given Oblique Mercator coordinates into a longitude/latitude location. |
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 longitude/latitude to Oblique Mercator transform on the given location. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final int FROM_LAT_LONG
public static final int TO_LAT_LONG
Constructor Detail |
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public ObliqueMercator(Ellipsoid ellipsoid)
ellipsoid
- to use in projection.Method Detail |
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public processing.core.PVector transformCoords(processing.core.PVector p)
transformCoords
in interface MapProjection
p
- point coordinates to transform.
public processing.core.PVector invTransformCoords(processing.core.PVector p)
invTransformCoords
in interface MapProjection
p
- Point coordinates 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 latLongToObliqueMercator(processing.core.PVector p)
lat
,lng
) coordinates into an oblique Mercator location.
Longitude/latitude 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 obliqueMercatorToLatLong(processing.core.PVector p)
p
- Location of point as an easting and northing in the Oblique Mercator projection (metres from local origin).
public Ellipsoid getEllipsoid()
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