MapProjection Methods

Function that checks if two projecions are identical.

Two map projections are identical, if they have the same set of parameters. if just one of the parameters are different, then the map projections are NOT identical.

Determines whether the specified object is equal to the current object.

Convert coordinates from geographical coordinates to projection coordinates

Convert a rotation from true north into a rotation from map projection north

It subtracts the convergence value from the true north rotation value

The convertion depends on the geographical location.

Convert coordinates from geographical coordinates and height to 3D Euclidean coordinates.

The 3D coordinate system origin is at the earth center (ellipsoid center)

Get the convergence (orientation towards true north) at the given geographical location.

The convergence is the angle measured clockwise from true north to the north-south gridline passing through the specified coordinate.

Function that returns the coordinate system type.

Use this function check the type of coordinate system e.g. east/north or some other combination. A typical application of this function is to exclude coordinate systems, that are not standard east/north-oriented.

Function that returns the default area in map projection coordinates of the projection.

The default area is the area where the projection is ment to be used and where it is accurate. It is not recommended to use the map projection outside its default area.

Serves as the default hash function.

Get the geographical origin of the map projection

Gets the Type of the current instance.

Returns true if the projectionString projection has a datum definition.

If a projection does not have an underlying datum, reprojections including datum shifts cannot be performed.

Returns true if the projectionString projection is a geographical projection, i.e. based on spherical (lon, lat) coordinates

Returns true if the projectionString projection is georeferenced, meaning that it is based on, or can convert to, geographical coordinates (longitude, latitude).

Returns true if the projectionString defines a local coordinate system that is not georeferenced.

The projection string for a local coordinate system is the string: "NON-UTM"

Returns true if the projectionString projection is "LONG/LAT"

"LONG/LAT" is a geographical coordinate system without an underlying datum (ellipsoid) definition.

Returns true if the projectionString is a valid projection string

Get the projection string for the UTM zone best matching the longitude coordinate

Convert coordinates from projection coordinates to geographical coordinates

Convert a rotation from map projection north into a rotation from true north.

It adds the convergence value to the projection north rotation value

The convertion depends on the geographical location.

Returns the geographical origin of the projection defined by the projstring

If the projection string is not a valid WKT string, an exception is thrown.

Returns the geographical origin of the projection defined by the projstring

If the projection string is not a valid WKT string, an exception is thrown.

Get the short name out of a WKT projetion string.

The short name is not unique amongst all WKT projections

If the projString is not a WKT projection string, the projString itself is returned as the short name.

Returns a string that represents the current object.

Convert coordinates from Euclidean 3D coordinates to geographical coordinates and height.

The 3D coordinate system origin is at the earth center (ellipsoid center)