Source CRS identifier or inline definition.
Destination CRS identifier or inline definition.
Additional host projection definitions.
Converter; its output may be nonfinite outside the projection domain.
GeoreferenceError For missing definitions or required datum grids.
Create a validated, reusable coordinate converter between explicit CRSs. Definitions and mandatory datum grids are checked once; the returned function only transforms. Converters are cached by resolved definition, so repeated calls are cheap.