[Mapserver-users] Projection Help

[Frank Warmerdam]

Paul VanDyke wrote:
> Driver: GTiff/GeoTIFF
> Size is 1833, 1141
> Coordinate System is:
> PROJCS["unnamed",
>     GEOGCS["NAD27",
>         DATUM["North_American_Datum_1927",
>             SPHEROID["Clarke 1866",6378206.4,294.9786982139006,
>                 AUTHORITY["EPSG","7008"]],
>             AUTHORITY["EPSG","6267"]],
>         PRIMEM["Greenwich",0],
>         UNIT["degree",0.0174532925199433],
>         AUTHORITY["EPSG","4267"]],
>     UNIT["unknown",1],
>     AUTHORITY["EPSG","26735"]]
> Origin = (-216345.100010,1788844.874145)
> Pixel Size = (839.88083200,-839.88083200)

Paul,

Well, the problem would appear to be that the coordinate system
GDAL is getting is wrong - likely because it was written to the
file improperly though that is hard to know.  Is the file small
enough that you could put it somewhere for me to grab and inspect?

I don't know if the problem is in GDAL (likely) or ArcGIS (possible).
The coordinate system you selected might not be properly supported for output
by ArcGIS to GeoTIFF.  You would probably be OK if you just entered
the appropriate projection in your .map file.  Can you send the ArcGIS
projection string for the projection in question?

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent