开源投影系统 Cartographic Projections library originally written by Gerald Evenden then of the USGS. The primary version of this web page can be found at http://www.remotesensing.org/proj, and mirrored at http://proj.maptools.org.

Proj4.7版，我已经编译好了，生成相应的proj.lib,proj_i.lib,和proj.d-Proj4.7 version, I have compiled to generate the corresponding proj.lib, proj_i.lib, and proj.dll