I am trying to read SDTS Elevation values from XXXCEL0.DDF and have been successful enought (thanks to GDAL and <a href="http://www.3dartist.com/WP/sdts/sdtsnotes.htm/">http://www.3dartist.com/WP/sdts/sdtsnotes.htm/</a> ). There are a bunch of other DDF files in the fileset XREF, IREF and many more each describing some details about the transfer. I tried to find information about them online, but not much was available. Where can I find these information. Also, I am new to this domain, so things like 30m and 10m DEM files or UTM looks jargon to me. Are there resources explaining these terms in simple english ?<br clear="all">
<br>-- <br>Karthik<br>check my blog @ <a href="http://talk-more.blogspot.com">http://talk-more.blogspot.com</a>