This United States Geological Survey (USGS) fact sheet provides information on USGS professional papers, bulletins, and circulars that deal with map projections. The information includes descriptions of common projections, additions of new projections, a bibliography, software for generating projections, and others. There is also a poster that summarizes basic information on map projections. Some of these materials are available online; others must be purchased in hardcopy. The poster is free.

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