[gdal-dev] Convert from GeoTiff to JP2

[Livneh Yehiyam]

Hi
I ran into a problem converting a GeoTiff to a Jpeg200 image, using gdal_translate and the JP2ECW driver.

My geotiff has GCP's as the georeference. Here is the output from gdalinfo:

Driver: GTiff/GeoTIFF
Files: 01122010-1509.tif
Size is 1680, 916
Coordinate System is `'
GCP Projection =
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["arc-second",4.848136811095361e-006],
    AUTHORITY["EPSG","4326"]]
GCP[  0]: Id=1, Info=
          (0,0) -> (126151.273546348,115626.820459333,0)
GCP[  1]: Id=2, Info=
          (0,916) -> (126145.399132411,115623.500933949,0)
GCP[  2]: Id=3, Info=
          (1680,916) -> (126151.213029255,115615.934065356,0)
GCP[  3]: Id=4, Info=
          (1680,0) -> (126157.194618444,115619.120192017,0)
Metadata:
  TIFFTAG_XRESOLUTION=1
  TIFFTAG_YRESOLUTION=1
  AREA_OR_POINT=Area
Image Structure Metadata:
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0,  916.0)
Upper Right ( 1680.0,    0.0)
Lower Right ( 1680.0,  916.0)
Center      (  840.0,  458.0)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue

after converting to jp2 using the command:
gdal_translate -of jp2ecw 01122010-1509.tif 01122010-1509.jp2

I get this from gdalinfo:
E:\Data\test>gdalinfo 01122010-1509.jp2
Driver: JP2ECW/ERMapper JPEG2000
Files: 01122010-1509.jp2
       01122010-1509.jp2.aux.xml
Size is 1680, 916
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"]]
GCP Projection =
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"]]
GCP[  0]: Id=1, Info=
          (0,0) -> (126151.273546348,115626.820459333,0)
GCP[  1]: Id=2, Info=
          (0,916) -> (126145.399132411,115623.500933949,0)
GCP[  2]: Id=3, Info=
          (1680,916) -> (126151.213029255,115615.934065356,0)
GCP[  3]: Id=4, Info=
          (1680,0) -> (126157.194618444,115619.120192017,0)
Metadata:
  TIFFTAG_XRESOLUTION=1
  TIFFTAG_YRESOLUTION=1
  AREA_OR_POINT=Area
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0,  916.0)
Upper Right ( 1680.0,    0.0)
Lower Right ( 1680.0,  916.0)
Center      (  840.0,  458.0)
Band 1 Block=1680x1 Type=Byte, ColorInterp=Red
  Overviews: arbitrary
Band 2 Block=1680x1 Type=Byte, ColorInterp=Green
  Overviews: arbitrary
Band 3 Block=1680x1 Type=Byte, ColorInterp=Blue
  Overviews: arbitrary

I think the problem is that both projectionRef, and GCPProjection are defined. This causes Global Mapper to fail reading the geo-reference data.

Is it a known problem, or am I doing something wrong?

Thanks
Yehiyam Livneh
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