<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On May 9, 2014, at 10:05 AM, Andrea Peri <<a href="mailto:aperi2007@gmail.com">aperi2007@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><p dir="ltr">Hi,<br>
You have right.<br>
I can read and try to understand the code but i don't know the PROJ lib. There is a specific file source dedicate to the reprojection functions ?</p><div><br></div></blockquote><div><br></div><div>Each projection has its own file these are named "PJ_XXXX"</div><div>where XXXX is an abbreviation of the projection's name</div><div><br></div>Proj4 is the codification of Snyder's "Map Projections: A Working Manual"</div><div>Where the derivation of the projections are discussed</div><div>this is available as a pdf from<br><a href="http://pubs.er.usgs.gov/publication/pp1395">http://pubs.er.usgs.gov/publication/pp1395</a><br></div><br></body></html>