CoordinateSystem - 52North/IlwisCore GitHub Wiki

A coordinate system gives meaning to coordinates. As such a coordinate is just a tuple of numbers, in combination with a coordinate system it describes a location on the globe. In Ilwis, a CoordinateSystem is responsible for transforming between spatial reference systems. There are various types of coordinate systems that differ mainly in how they transform coordinate system. There are of course the well-known geographic and projected systems ( in Ilwis 'ConventionalCoordinateSystems'), but also more exotic types like FormulaCoordinateSystems, TiepointCoordinateSystems and others are possible.

The bulk is the projected and geographic coordinate systems though.