GDAL doesn't read the georeference info for High-Res Spotlight Terra-SAR X

[vali]

GDAL doesn't seem to properly read the georeference info from High Res Spotlight Terra-SAR X data. The data loaded with FWTools is treated like a raster without geographic references. The same COSAR format is used for the Stripmap Terra-SAR X data and GDAL knows how to deal with it. It seems that although both Spotlight and Stripmap data are SSC of COSAR format, there is a difference at georeferences level.

[pvachon]

Hi,

I have not had access to spotlight imagery, so I have been unable to test, but I need to know exactly which file you're opening. If you're opening the COSAR file directly, the image will not have any georeferencing, as all that information is contained in the XML annotation file.

A possible enhancement would be to implicitly open the XML file if it's found and the user opens the COSAR file.

Cheers, Phil

[antonio]

Replying to pvachon:

Hi,

I have not had access to spotlight imagery, so I have been unable to test, but I need to know exactly which file you're opening. If you're opening the COSAR file directly, the image will not have any georeferencing, as all that information is contained in the XML annotation file.

Hope this helps:

​http://www.infoterra.de/tsx/freedata/start.php

[Jukka Rahkonen]

I downloaded some random image which I believe to be of correct product type: 2007-12-15_Toronto_MGD-SE.zip

Gdalinfo with a few years later GDAL version 2.0-dev about the image:

gdalinfo TSX1_SAR__MGD_SE___SL_S_SRA_20071215T112105_20071215T112107.xml
Driver: TSX/TerraSAR-X Product
Files: TSX1_SAR__MGD_SE___SL_S_SRA_20071215T112105_20071215T112107.xml
Size is 15571, 14016
Coordinate System is:
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
GeoTransform =
  280.5076156797187, 9.194905225381328e-006, -1.422418287853194e-006
  43.74004988034108, -1.020856712671305e-006, -6.670835515410617e-006
Metadata:
  ABSOLUTE_ORBIT=2784
  AZIMUTH_LOOKS=9.95212674140930176E-01
  COL_SPACING=7.50000000000000000E-01
  COL_SPACING_UNITS=m
  IMAGE_TYPE=DETECTED
  IMAGING_MODE=SL
  MAPPING_GRID=.\AUXRASTER\MAPPING_GRID.bin
  OPERATIONAL_MODE=operational
  ORBIT_CYCLE=17
  ORBIT_DIRECTION=DESCENDING
  PRODUCT_VARIANT=MGD
  RANGE_LOOKS=1.02703404426574707E+00
  ROW_SPACING=7.50000000000000000E-01
  SCENE_CENTRE_TIME=2007-12-15T11:21:06.318949Z
Corner Coordinates:
Upper Left  (     280.508,      43.740) (280d30'27.42"E, 43d44'24.18"N)
Lower Left  (     280.488,      43.647) (280d29'15.64"E, 43d38'47.59"N)
Upper Right (     280.651,      43.724) (280d39' 2.84"E, 43d43'26.95"N)
Lower Right (     280.631,      43.631) (280d37'51.07"E, 43d37'50.36"N)
Center      (     280.569,      43.685) (280d34' 9.24"E, 43d41' 7.27"N)
Band 1 Block=15571x1 Type=UInt16, ColorInterp=Undefined
  Metadata:
    POLARIMETRIC_INTERP=HH

This looks rather good to me. Reopen if you do not agree.