Strange looking gdalinfo output

[Stephen Davies]

I recently purchased a collection of images from the local State 
Government. The images were provided in both ECW and TIF formats.

If I do a gdalinfo on the TIFs, I get reasonable looking output:

Driver: GTiff/GeoTIFF
Size is 4270, 4079
Coordinate System is:
PROJCS["GDA94 / MGA zone 53",
    GEOGCS["GDA94",
        DATUM["Geocentric_Datum_of_Australia_1994",
            SPHEROID["GRS 1980",6378137,298.2572221010042,
                AUTHORITY["EPSG","7019"]],
            AUTHORITY["EPSG","6283"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4283"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",135],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",10000000],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","28353"]]
Origin = (701028.967763,6051913.962025)
Pixel Size = (2.00000000,-2.00000000)
Metadata:
  AREA_OR_POINT=Area
  TIFFTAG_DOCUMENTNAME=ER Mapper 7.0
  TIFFTAG_IMAGEDESCRIPTION=ER Mapper GeoTiff raster translator V1.0: 
Band 1 = Red, Band 2 = Green, Band 3 = Blue
  TIFFTAG_SOFTWARE=ER Mapper 7.0
  TIFFTAG_XRESOLUTION=0
  TIFFTAG_YRESOLUTION=0
Corner Coordinates:
Upper Left  (  701028.968, 6051913.962) (137d13'14.56"E, 35d39'22.23"S)
Lower Left  (  701028.968, 6043755.962) (137d13'21.91"E, 35d43'46.83"S)
Upper Right (  709568.968, 6051913.962) (137d18'53.94"E, 35d39'15.84"S)
Lower Right (  709568.968, 6043755.962) (137d19'1.60"E, 35d43'40.42"S)
Center      (  705298.968, 6047834.962) (137d16'8.00"E, 35d41'31.37"S)
Band 1 Block=4270x20 Type=Byte, ColorInterp=Red
Band 2 Block=4270x20 Type=Byte, ColorInterp=Green
Band 3 Block=4270x20 Type=Byte, ColorInterp=Blue


If I do it on ECW version of the same image, I get decidedly strange 
results:

Driver: ECW/ERMapper Compressed Wavelets
Size is 4270, 4079
Coordinate System is:
PROJCS["MGA53",
    GEOGCS["GEOCENTRIC DATUM of AUSTRALIA",
        DATUM["GDA94",
            SPHEROID["GRS80",6378137,298.257222101]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",135],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",10000000],
    PARAMETER["false_northing",500000],
    UNIT["Meter",1]]
Origin = (701028.967763,6051913.962025)
Pixel Size = (2.00000000,-2.00000000)
Corner Coordinates:
Upper Left  (  701028.968, 6051913.962) ( 75d26'18.41"E,515d 9'42.93"N)
Lower Left  (  701028.968, 6043755.962) ( 60d36'10.10"E,508d43'14.95"N)
Upper Right (  709568.968, 6051913.962) ( 67d59'32.56"E,511d19'30.87"N)
Lower Right (  709568.968, 6043755.962) ( 53d15'25.56"E,504d56'0.67"N)
Center      (  705298.968, 6047834.962) ( 64d17'19.78"E,510d 1'12.50"N)
Band 1 Block=4270x1 Type=Byte, ColorInterp=Red
  Overviews: arbitrary
Band 2 Block=4270x1 Type=Byte, ColorInterp=Green
  Overviews: arbitrary
Band 3 Block=4270x1 Type=Byte, ColorInterp=Blue
  Overviews: arbitrary


In particular, the false easting/northing values are swapped and the 
extent lat/long values are quite different.

Could this be a problem with gdalinfo or is the data wrong?

TIA,
Stephen Davies
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