Geodat was a commercial project, begun in 1980 and completed by 1991, that provided digital geographic mapping data for commercial users at scales equal to or greater than 1:1,000,000. The term `Geodat` was derived from `GEOgraphic DATa`. Geodat data was primarily `medium scale`, a nominal 1:100,000, but ranged from 1:50,000 to 1:250,000. Th...