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Package org.apache.sis.referencing.operation.transform

Conversions or transformations of multi-dimensional coordinate points.

See: Description

Package org.apache.sis.referencing.operation.transform Description

Conversions or transformations of multi-dimensional coordinate points. Math­Transform provides a single API for coordinate conversions or transformations, including map projections. Each Math­Transform instances can: Math­Transform are truly n-dimensional, but specialized implementations for 1D and 2D cases are provided for performance reasons or for inter-operability with Java2D. In the 2D case, Apache SIS provides instances of the standard Affine­Transform class when possible.

This package does not include map projections, which are a special kind of transforms defined in their own projection package.

Creating math transforms
Math­Transform instances can be created either directly or indirectly. The recommended way is the indirect one: first find the coordinate operation (generally from a pair of source and target CRS), then invoke Coordinate­Operation​.get­Math­Transform(). However sophisticated users can also create math transforms explicitely from a group of parameter values using the math transform factory.
Non-spatial coordinates
Math­Transform usually performs conversions or transformations from points given in a source coordinate reference system to coordinate values for the same points in the target coordinate reference system. However the conversions are not necessarily between CRS; a Math­Transform can also be used for converting the sample values in a raster for example. Such kind of transforms are named transfer functions.

Defined in the sis-referencing module

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