<HTML dir=ltr><HEAD>
<META content="text/html; charset=unicode" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.7600.16385"></HEAD>
<BODY>
<DIV dir=ltr id=idOWAReplyText82030>
<DIV dir=ltr><FONT color=#000000 size=2 face="Times New Roman">Consider the source code for GeoTrans, the package available from <A href="http://www.nga.mil">www.nga.mil</A> - however, I don't know if it's C or C++.</FONT></DIV>
<DIV dir=ltr><FONT color=#000000 size=2 face="Times New Roman"></FONT> </DIV></DIV>
<DIV dir=ltr id=idSignature6159>
<DIV><FONT color=#000000 size=2 face="Times New Roman"><SPAN style="FONT-SIZE: 10pt">
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt; mso-ansi-language: DE" lang=DE>Clifford J. Mugnier, C.P., C.M.S.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Chief of Geodesy,<o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><B><SPAN style="FONT-VARIANT: small-caps; FONT-SIZE: 10pt">Center for GeoInformatics<o:p></o:p></SPAN></B></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Department of Civil Engineering <o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Patrick F. Taylor Hall 3223A<o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><B><SPAN style="FONT-SIZE: 10pt">LOUISIANA STATE UNIVERSITY <o:p></o:p></SPAN></B></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Baton Rouge, LA<SPAN style="mso-spacerun: yes"> </SPAN>70803<o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Voice and Facsimile:<SPAN style="mso-spacerun: yes"> </SPAN>(225) 578-8536 [Academic] <o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Voice and Facsimile:<SPAN style="mso-spacerun: yes"> </SPAN>(225) 578-4578 [Research] <o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Cell: (225) 238-8975 [Academic & Research]<o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Honorary Life Member of the <o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Louisiana Society of Professional Surveyors <o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Fellow Emeritus of the ASPRS <o:p></o:p></SPAN></DIV>
<DIV style="MARGIN: 0in 0in 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 10pt">Member of the Americas Petroleum Survey Group<o:p></o:p></SPAN></DIV><BR></SPAN></FONT></DIV></DIV>
<DIV dir=ltr><BR>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> proj-bounces@lists.maptools.org on behalf of Evan Miller<BR><B>Sent:</B> Tue 30-Nov-10 09:26<BR><B>To:</B> proj@lists.maptools.org<BR><B>Subject:</B> [Proj] geod C library?<BR></FONT><BR></DIV>
<DIV>
<DIV>Hi all,<BR clear=all></DIV>
<DIV><BR></DIV>
<DIV>I am looking for the functionality provided by "geod" and "invgeod" (great circle calculations) wrapped up in a plain C library. I found Charles Karney's Geographic Library, but that's C++.</DIV>
<DIV><BR></DIV>
<DIV>Does anyone know of such a library? Is there any reason (other than time and effort) that Proj.4 doesn't provide a geod API?</DIV>
<DIV><BR></DIV>
<DIV>Thanks,<BR></DIV>
<DIV><BR></DIV>
<DIV>Evan Miller</DIV></DIV></BODY></HTML>