[Gdal-dev] adding gcp's

[Bart van den Eijnden]

Hi list,

I am trying to create a geotiff and add ground control points to it, using the following command:

gdal_translate ondergrond.tif ondergrond_new.tif -gcp 0 0 63978 458335 -gcp 1290 1619 85630 438699

When I do gdalinfo, the gcp's are added, but the corner info is not using it:

D:\ms4w\apps\stragisweb\htdocs\sites\westland\data\basis\geo>gdalinfo ondergrond_new.tif
Driver: GTiff/GeoTIFF
Size is 1290, 1169
Coordinate System is `'
GCP Projection =
GCP[  0]: Id=1, Info=
          (0,0) -> (63978,458335,0)
GCP[  1]: Id=2, Info=
          (1290,1619) -> (85630,438699,0)
Metadata:
  TIFFTAG_SOFTWARE=IrfanView
  TIFFTAG_XRESOLUTION=150
  TIFFTAG_YRESOLUTION=150
  TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0, 1169.0)
Upper Right ( 1290.0,    0.0)
Lower Right ( 1290.0, 1169.0)
Center      (  645.0,  584.5)
Band 1 Block=1290x6 Type=Byte, ColorInterp=Red
Band 2 Block=1290x6 Type=Byte, ColorInterp=Green
Band 3 Block=1290x6 Type=Byte, ColorInterp=Blue

What am I doing wrong?

Thanks in advance.

Best regards,
Bart

Bart van den Eijnden
Syncera IT Solutions
Postbus 270
2600 AG  DELFT

tel.nr.: 015-7512436
email: BEN at Syncera-ITSolutions.nl