Ellipsoid and geodetic datums

Describes how the Earth is modeled.

Describes the ellipsoids and explains how they are used to model the Earth. Also gives a list of the predefined ellipsoids that are supplied with the JViews Maps projection package.

Explains the use of geodetic datums of various kinds.

Tells you all about map projections.

Explains how the spatial reference system in JViews Maps has reference attributes that are coordinates and explains the various coordinate systems.