[Gdal-dev] gdalwarp does not use my +towgs84 parameter

Uwe Raudszus URaudszus at STADTDO.DE
Tue Oct 2 05:20:18 EDT 2007


Hallo List,

I'm trying to reproject a tif image using gdalwarp.  Specially, 
from GAUSS-KRUEGER Zone 2 to UTM Zone 32 (epsg:25832). For more precision i
try to use local towgs84
parameter. But it seems so, that gdalwarp does not use my +towgs84
parameter.
Is there any way to include these parameters in my gdalwarp code?

Uwe


C:\work\rasterfactory\work>gdalwarp -s_srs "+proj=tmerc +lat_0=0 +lon_0=6
+k=1.0
00000 +x_0=2500000 +y_0=0 +ellps=bessel +datum=potsdam
+towgs84=600.75,20,413  +
units=m" -t_srs EPSG:25832 -multi -dstnodata 255 -of Gtiff -co
"INTERLEAVE=PIXEL
" -co COMPRESS=PACKBITS -co TFW=true
c:\work\rasterfactory\output\8\8_31466_wgs.
tif c:\work\rasterfactory\output\8\8_25832.tif
Output dataset c:\work\rasterfactory\output\8\8_25832.tif exists,
but some commandline options were provided indicating a new dataset
should be created.  Please delete existing dataset and run again.

C:\work\rasterfactory\work>gdalwarp -s_srs "+proj=tmerc +lat_0=0 +lon_0=6
+k=1.0
00000 +x_0=2500000 +y_0=0 +ellps=bessel +datum=potsdam
+towgs84=600.75,20,413  +
units=m" -t_srs EPSG:25832 -multi -dstnodata 255 -of Gtiff -co
"INTERLEAVE=PIXEL
" -co COMPRESS=PACKBITS -co TFW=true
c:\work\rasterfactory\output\8\8_31466_wgs.
tif c:\work\rasterfactory\output\8\8_25832.tif
Copying color table from c:\work\rasterfactory\output\8\8_31466_wgs.tif to
new f
ile.
Creating output file that is 8861P x 9557L.
Processing input file c:\work\rasterfactory\output\8\8_31466_wgs.tif.
:0...10...20...30...40...50...60...70...80...90...100 - done.

C:\work\rasterfactory\work>listgeo
c:\work\rasterfactory\output\8\8_25832.tif
TIFFReadDirectory: Warning, Unknown field with tag 42113 (0xa481)
encountered.
Geotiff_Information:
   Version: 1
   Key_Revision: 1.0
   Tagged_Information:
      ModelTiepointTag (2,3):
         0                0                0
         387002.011       5710514.84       0
      ModelPixelScaleTag (1,3):
         0.0564260761     0.0564260761     0
      End_Of_Tags.
   Keyed_Information:
      GTModelTypeGeoKey (Short,1): ModelTypeProjected
      GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
      GTCitationGeoKey (Ascii,22): "ETRS89 / UTM zone 32N"
      GeogCitationGeoKey (Ascii,7): "ETRS89"
      GeogAngularUnitsGeoKey (Short,1): Angular_Degree
      ProjectedCSTypeGeoKey (Short,1): Unknown-25832
      ProjLinearUnitsGeoKey (Short,1): Linear_Meter
      End_Of_Keys.
   End_Of_Geotiff.

PCS = 25832 (ETRS89 / UTM zone 32N)
Projection = 16032 (UTM zone 32N)
Projection Method: CT_TransverseMercator
   ProjNatOriginLatGeoKey: 0.000000 (  0d 0' 0.00"N)
   ProjNatOriginLongGeoKey: 9.000000 (  9d 0' 0.00"E)
   ProjScaleAtNatOriginGeoKey: 0.999600
   ProjFalseEastingGeoKey: 500000.000000 m
   ProjFalseNorthingGeoKey: 0.000000 m
GCS: 4258/ETRS89
Datum: 6258/European Terrestrial Reference System 1989
Ellipsoid: 7019/GRS 1980 (6378137.00,6356752.31)
Prime Meridian: 8901/Greenwich (0.000000/  0d 0' 0.00"E)
Projection Linear Units: 9001/metre (1.000000m)

Corner Coordinates:
Upper Left    (  387002.011, 5710514.843)
Lower Left    (  387002.011, 5709975.579)
Upper Right   (  387502.002, 5710514.843)
Lower Right   (  387502.002, 5709975.579)
Center        (  387252.007, 5710245.211)



C:\work\rasterfactory\work>gdalwarp -s_srs "+proj=tmerc +lat_0=0 +lon_0=6
+k=1.0
00000 +x_0=2500000 +y_0=0 +ellps=bessel +datum=potsdam  +units=m" -t_srs
EPSG:25
832 -multi -dstnodata 255 -of Gtiff -co "INTERLEAVE=PIXEL" -co
COMPRESS=PACKBITS
 -co TFW=true c:\work\rasterfactory\output\8\8_31466_wgs.tif
c:\work\rasterfacto
ry\output\8\8_25832_2.tif
Copying color table from c:\work\rasterfactory\output\8\8_31466_wgs.tif to
new f
ile.
Creating output file that is 8861P x 9557L.
Processing input file c:\work\rasterfactory\output\8\8_31466_wgs.tif.
:0...10...20...30...40...50...60...70...80...90...100 - done.

C:\work\rasterfactory\work>listgeo
c:\work\rasterfactory\output\8\8_25832_2.tif
TIFFReadDirectory: Warning, Unknown field with tag 42113 (0xa481)
encountered.
Geotiff_Information:
   Version: 1
   Key_Revision: 1.0
   Tagged_Information:
      ModelTiepointTag (2,3):
         0                0                0
         387002.011       5710514.84       0
      ModelPixelScaleTag (1,3):
         0.0564260761     0.0564260761     0
      End_Of_Tags.
   Keyed_Information:
      GTModelTypeGeoKey (Short,1): ModelTypeProjected
      GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
      GTCitationGeoKey (Ascii,22): "ETRS89 / UTM zone 32N"
      GeogCitationGeoKey (Ascii,7): "ETRS89"
      GeogAngularUnitsGeoKey (Short,1): Angular_Degree
      ProjectedCSTypeGeoKey (Short,1): Unknown-25832
      ProjLinearUnitsGeoKey (Short,1): Linear_Meter
      End_Of_Keys.
   End_Of_Geotiff.

PCS = 25832 (ETRS89 / UTM zone 32N)
Projection = 16032 (UTM zone 32N)
Projection Method: CT_TransverseMercator
   ProjNatOriginLatGeoKey: 0.000000 (  0d 0' 0.00"N)
   ProjNatOriginLongGeoKey: 9.000000 (  9d 0' 0.00"E)
   ProjScaleAtNatOriginGeoKey: 0.999600
   ProjFalseEastingGeoKey: 500000.000000 m
   ProjFalseNorthingGeoKey: 0.000000 m
GCS: 4258/ETRS89
Datum: 6258/European Terrestrial Reference System 1989
Ellipsoid: 7019/GRS 1980 (6378137.00,6356752.31)
Prime Meridian: 8901/Greenwich (0.000000/  0d 0' 0.00"E)
Projection Linear Units: 9001/metre (1.000000m)

Corner Coordinates:
Upper Left    (  387002.011, 5710514.843)
Lower Left    (  387002.011, 5709975.579)
Upper Right   (  387502.002, 5710514.843)
Lower Right   (  387502.002, 5709975.579)
Center        (  387252.007, 5710245.211)

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