<div dir="ltr">Hi John,<br><br>No guarantees that I got this right, but you could try adding the following entry to your "FWTools/share/proj/epsg" file:<br><br># Guatemala Transverse Mercator<br><001234> +proj=tmerc +x_0=500000.000000 +y_0=0 +lon_0=-90.5 +lat_0=0 +k=0.999800 +ellps=WGS84 +datum=WGS84 +to_meter=0.3048006096012192 +no_defs <><br>
<br>Then you should be able to acces it by using "EPSG:001234" in your -s_srs parameters.<br><br>Roger<br>--<br><br><div class="gmail_quote">On Mon, Oct 6, 2008 at 7:10 AM, John Mitchell <span dir="ltr"><<a href="mailto:mitchelljj98@gmail.com">mitchelljj98@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div dir="ltr">Hi,<br><br>How would I create an epsg code that can be used within the epsg file for fwtools and MapServer?<br>
<br>Below is the information that I would like to use to create an epsg code. What would be format for the new epsg code? Is the information listed below enough to create an epsg code and if not what am I missing?<br>
<br><br><b>The 2001 data was originally in a Guatemalan Transverse Mercator
coordinate<br>system with the parameters shown below:<br><br>Projection:
Transverse Mercator<br>False Easting: 500000.000000<br>False Northing:
0.000000<br>Central Meridian: -90.500000<br>Scale Factor: 0.999800<br>Latitude
of Origin: 0.0000000<br>Linear Unit: Meter<br>Geographic Coordinate System:
GCS_WGS_1984<br><br></b>Below is the gdalinfo listing for one of files that I would like to associate to this new epsg code:<br><br><b>Driver: GTiff/GeoTIFF<br>
Size is 11214, 7860<br>Coordinate System is `'<br>Origin = (317049.000000000000000,</b><div dir="ltr"><b>1659460.000000000000000)<br>Pixel Size = (0.500000000000000,-0.</b><b>500000000000000)<br>Metadata:<br> AREA_OR_POINT=Area<br>
TIFFTAG_SOFTWARE=ERDAS IMAGINE<br>
TIFFTAG_XRESOLUTION=1<br> TIFFTAG_YRESOLUTION=1<br> TIFFTAG_RESOLUTIONUNIT=1 (unitless)<br>Corner Coordinates:<br>Upper Left ( 317049.000, 1659460.000) <br>Lower Left ( 317049.000, 1655530.000) <br>Upper Right ( 322656.000, 1659460.000) <br>
Lower Right ( 322656.000, 1655530.000) <br>Center ( 319852.500, 1657495.000) <br>Band 1 Block=11214x8 Type=Byte, ColorInterp=Red<br>Band 2 Block=11214x8 Type=Byte, ColorInterp=Green<br>Band 3 Block=11214x8 Type=Byte, ColorInterp=Blue</b></div>
<br><br><br>Thanks,<br clear="all"><br>-- <br>John J. Mitchell<br>
</div>
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