Show pagesourceOld revisionsBacklinksBack to top Share via Share via... Twitter LinkedIn Facebook Pinterest Telegram WhatsApp Yammer RedditRecent ChangesSend via e-MailPrintPermalink × This is an old revision of the document! Projections External Links From “Web Mapping Illustrated”: Museums Teaching Planet Earth web site PROJ.4 - Cartographic Projections Library Atlas of Canada's Map Making learning resources United States Geologic Survey (USGS) projection document GDAL/OGR libraries and utilities Spherical trigonometry Coordinates, datums and transformations Other: RADICAL CARTOGRAPHY docs/gis/projections/links.1177738172.txt.gz Last modified: 2008/08/03 00:25(external edit)