GEO2XY: Stata module to convert latitude and longitude to xy using map projections

geo2xy converts geographic latitude and longitude to cartesian coordinates (x, y) using map projection transformations. The default projection is a Web Mercator, which is the same used by most web mapping applications (Google Maps, Bing Maps, etc.). As an option, -geo2xy- can generate Tissot's indicatrices (grid of circles) which, when overlaid on a map of the projected coordinates, help visualize the distortions of the chosen projection. With projected coordinates, high quality maps can be produced using standard Stata graph commands or with user-written commands like -spmap-.