NASA’s Global Map Projector — G.Projector for short — is a lovely little program that transforms any equirectangular map image (one is included) into another projection. It’s a tremendous amount of fun, and a very useful way of visualizing map projections. It’s a Java application, so there are some performance issues, but at least it’s cross-platform (so long as you have Java installed).

A library of compatible map images is available here.

Thanks to Paul B. Anderson, who’s responsible for this excellent map projections site, for the links.

Previously: New URL for Gallery of Map Projections; Interactive Album of Map Projections; Java World Maps Projection Page.