Projected Coordinate System

Programming with JViews Maps > Ellipsoid and Geodetic Datums > Spatial Reference System > Projected Coordinate System

Projected Coordinate System

The geographic and geocentric coordinate systems are not well suited to display maps, since these coordinate systems define map features in a three dimensional world. Before displaying objects, the dimension of coordinates must be reduced to 2. This is performed using map projections (see Map Projections).

A projected coordinate system includes all the parameters that allow you to describe a coordinate system in which each planar coordinate is computed from geographic coordinates using a mathematical function. These include:

The reference geographic coordinate system (the surface modelling the Earth).
The mathematical transformation itself (the projection).

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