Guys, I'm developing a free application that converts coordinates from one system to another. Right now, the application converts from Geographic coordinates to UTM and vice-versa using WGS84/SAD-69 datuns. I would like to know if anybody can send me the mathematical model of other projection systems (polyconic for example) and datum information, or an url where I can find it.
Any help will be very appreciated.
Joao.
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