org.gicentre.utils.spatial
Class Swiss

java.lang.Object
  org.gicentre.utils.spatial.Swiss

All Implemented Interfaces:

MapProjection

public class Swiss
extends java.lang.Object
implements MapProjection

Class for representing the Swiss coordinate system. This is an oblique Mercator projection with a 90 degree azimuth, centre at the the old observatory at Bern and scale factor of 1.0.

Version:

3.3, 27th June, 2012.

Author:

Jo Wood, giCentre, City University London.

Field Summary

static int	FROM_LAT_LONG Indicates a transformation from longitude/latitude.
static int	TO_LAT_LONG Indicates a transformation to longitude/latitude.

Constructor Summary

Swiss()
Initialises the transformer assuming a forward transformation is from longitude/latitude to Swiss coordinates.

Swiss(int direction)
Initialises the transformer in the given direction.

Method Summary

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 Swiss grid to longitude/latitude transform on the given location.
processing.core.PVector	latLongToSwiss(processing.core.PVector p) Converts the given longitude/latitude coordinates into Swiss grid.
void	setInterpolation(boolean doInterpolation) Sets whether the transformation should use nearest neighbour (false) or some interpolator (true).
processing.core.PVector	swissToLatLong(processing.core.PVector p) Converts the given Swiss coordinates to longitude/latitude location.
processing.core.PVector	transformCoords(processing.core.PVector p) Performs a forward longitude/latitude to Swiss grid transform on the given location.

Methods inherited from class java.lang.Object

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

Field Detail

FROM_LAT_LONG

public static final int FROM_LAT_LONG

Indicates a transformation from longitude/latitude.

See Also:

Constant Field Values

TO_LAT_LONG

public static final int TO_LAT_LONG

Indicates a transformation to longitude/latitude.

See Also:

Constant Field Values

Constructor Detail

Swiss

public Swiss()

Initialises the transformer assuming a forward transformation is from longitude/latitude to Swiss coordinates. This is equivalent to calling the constructor with FROM_LAT_LONG as the parameter.

Swiss

public Swiss(int direction)

Initialises the transformer in the given direction.

Parameters:

direction - Indicates whether transforming to or from longitude/latitude.

Method Detail

latLongToSwiss

public processing.core.PVector latLongToSwiss(processing.core.PVector p)

Converts the given longitude/latitude coordinates into Swiss grid. Longitude/latitude should be in decimal degrees with positive North and negative East.

Parameters:

p - Longitude/latitude point. Longitude varies within +-180 degrees, latitude within +-90 degrees.

Returns:

Swiss coordinates of the given longitude/latitude location.

swissToLatLong

public processing.core.PVector swissToLatLong(processing.core.PVector p)

Converts the given Swiss coordinates to longitude/latitude location.

Parameters:

p - Location of point as an easting and northing in the Swiss projection (metres from local origin).

Returns:

Longitude/latitude coordinates of the given location (decimal degrees).

transformCoords

public processing.core.PVector transformCoords(processing.core.PVector p)

Performs a forward longitude/latitude to Swiss grid transform on the given location.

Specified by:

transformCoords in interface MapProjection

Parameters:

p - Point coordinates to transform.

Returns:

Transformed footprint.

invTransformCoords

public processing.core.PVector invTransformCoords(processing.core.PVector p)

Performs an inverse Swiss grid to longitude/latitude transform on the given location.

Specified by:

invTransformCoords in interface MapProjection

Parameters:

p - Point coordinates to transform.

Returns:

Transformed footprint.

getDescription

public java.lang.String getDescription()

Provides a general description of the transformation.

Specified by:

getDescription in interface MapProjection

Returns:

Description of the transformation.

doInterpolation

public boolean doInterpolation()

Indicates whether the transformation should use nearest neighbour (false) or some interpolator (true).

Returns:

True if transformation should perform some local interpolation.

setInterpolation

public void setInterpolation(boolean doInterpolation)

Sets whether the transformation should use nearest neighbour (false) or some interpolator (true).

Parameters:

doInterpolation - True if transformation should perform some local interpolation.

getEllipsoid

public Ellipsoid getEllipsoid()

Reports the ellipsoid used in the transformation.

Returns:

Ellipsoid used in the transformation.