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java.lang.Objectorg.gicentre.utils.spatial.WebMercator
public class WebMercator
Class for representing the Web Mercator coordinate system. This is a Mercator projection assuming a spherical rather than ellipsoidal figure of the earth. Used for transforming to/from projected GoogleMaps, OpenStreetMaps and BingMaps.
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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WebMercator()
Initialises the transformer assuming a forward transformation is from longitude/latitude WGS84 to Web (spherical) Mercator coordinates. |
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WebMercator(int direction)
Initialises the transformer in the given direction. |
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 Web Mercator grid to longitude/latitude transform on the given location. |
processing.core.PVector |
latLongToWebMercator(processing.core.PVector p)
Converts the given longitude/latitude coordinates into Web (spherical) Mercator coordinates. |
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 Web Mercator grid transform on the given location. |
processing.core.PVector |
webMercatorToLatLong(processing.core.PVector p)
Converts the given Web Mercator coordinates to WGS84 longitude/latitude 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 WebMercator()
public WebMercator(int direction)
direction
- Indicates whether transforming to or from longitude/latitude.Method Detail |
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public processing.core.PVector latLongToWebMercator(processing.core.PVector p)
p
- Longitude/latitude point. Longitude varies within +-180 degrees, latitude within +-88 degrees.
public processing.core.PVector webMercatorToLatLong(processing.core.PVector p)
p
- Location of point as an easting and northing in the Web Mercator projection.
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 Ellipsoid getEllipsoid()
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