Richard,<br>
<br>
<div><span class="gmail_quote">On 10/6/05, <b class="gmail_sendername">Richard A. Milewski</b> <<a href="mailto:ram@rampage.net">ram@rampage.net</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I'm trying to use some government map rasters (tifs) in Mapserver. The
specs that come with the tif's list the projection information as:<br>
<dl><dd><dl><dd><dl><dd>
<dl><dt><em>Map_Projection:</em> </dt><dd>
<dl><dt><em>Map_Projection_Name:</em> Lambert Conformal
Conic</dt></dl></dd></dl></dd></dl>
</dd></dl>
</dd></dl>
I'm trying understand how to translate that into the PROJECTION clause
in a Mapserver layer specification in a .MAP file.<br>
My best guess (...and I am guessing...) is:<br>
<br>
PROJECTION<br>
proj=lcc <br>
lat_1=38.666670<br>
lat_2=33.333330 <br>
lat_0=38.333330<br>
lon_0=-121.466670 <br>
x_0=0.000000<br>
y_0=0.000000<br>
ellps=GRS80 <br>
units=m <br>
no_defs <br>
END<br>
<br><span class="sg">
</span></blockquote></div>
<br>
I believe there are two things that might help:<br>
<br>
1. Try switching the lat_1 and lat_2 (lat_1 is the first standard
parrallel which most likely means the southern-most parallel)<br>
<br>
2. Add "datum=nad83" <br>
<br>
If that doesn't do it, check out
<a href="http://www.remotesensing.org/geotiff/proj_list/lambert_conic_conformal_2sp.html">http://www.remotesensing.org/geotiff/proj_list/lambert_conic_conformal_2sp.html</a>
. In general it's just a great resource for finding projection info.<br>
<br>
Hope this helps,<br>
-- <br>Matt Perry<br><a href="mailto:perrygeo@gmail.com">perrygeo@gmail.com</a><br><a href="http://www.perrygeo.net">http://www.perrygeo.net</a>