[gdal-dev] GDALwarp - Too many points (441 out of 441)

[Frank Warmerdam]

Thomas Becker wrote:
> Hello listers,
> 
> i am new to GDAL and have a problem to warp a GeoTiff.
> The projection of the GeoTiff i got is shown in QGIS as
> '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'
> but the info file from the department says
> ETRS89/ UTM 33 Ellipsoide GRS80.
> 
> Now i was trying to use gdalwarp with
> 
> gdalwarp -s_srs '+proj=longlat +ellps=WGS84 +datum=WGS84' -t_srs
> '+proj=utm +zone=33 +ellps=GRS80' input.tif output.tif
...
> I will add the gdalinfo output:
> 
> Driver: GTiff/GeoTIFF Size is 10000, 10000 Coordinate System is `'
> Origin = (33360000.000000000000000,5972000.000000000000000) Pixel Size =
> (0.200000000000000,-0.200000000000000) Metadata:

Thomas,

The above coordinates do not appear to be UTM 33 (much less lat/long
decimal degrees).  Specifically with an X origin of 33 million you are
either using a world projection (the world is roughly 40 million meters
around) or you are measuring in some alternate units like centimeters.

Basically, you need to find out what coordinate system you are working
with before you can meaningfully proceed.

My offhand guess would be that you are using Plate Caree with a false
easting such that the origin is at the dateline instead of the greenwich
meridian.  But that is a shot in the dark.

PS. I hate playing "please guess my coordinate system" games.

Best regards,
-- 
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