[gdal-dev] Corner Coordinates for a PixelisPoint type GeoTIFF

[Hermann Peifer]

Hi All,

I am somewhat puzzled by the different sets of corner coordinates that 
gdalinfo and listgeo report for the same PixelisPoint GeoTIFF, see [1] 
and [2]. Can both be true at the same time?

Thanks, Hermann


[1]

$ gdalinfo cdda100.tif
Driver: GTiff/GeoTIFF
Files: cdda100.tif
Size is 56392, 44743
Coordinate System is:
PROJCS["ETRS_1989_LAEA",
     GEOGCS["GCS_ETRS_1989",
         DATUM["European_Terrestrial_Reference_System_1989",
             SPHEROID["GRS_1980",6378137.0,298.257222101]],
         PRIMEM["Greenwich",0.0],
         UNIT["Degree",0.0174532925199433]],
     PROJECTION["Lambert_Azimuthal_Equal_Area"],
     PARAMETER["False_Easting",4321000.0],
     PARAMETER["False_Northing",3210000.0],
     PARAMETER["longitude_of_center",10.0],
     PARAMETER["latitude_of_center",52.0],
     UNIT["Meter",1.0]]
Origin = (1547200.000000000000000,5416000.000000000000000)
Pixel Size = (100.000000000000000,-100.000000000000000)
Metadata:
   AREA_OR_POINT=Point
   TIFFTAG_SOFTWARE=Arc/Info
   TIFFTAG_XRESOLUTION=0.0099999998
   TIFFTAG_YRESOLUTION=0.0099999998
   TIFFTAG_RESOLUTIONUNIT=1 (unitless)
Image Structure Metadata:
   COMPRESSION=LZW
   INTERLEAVE=BAND
Corner Coordinates:
Upper Left  ( 1547200.000, 5416000.000) ( 48d 6'29.49"W, 60d36'53.91"N)
Lower Left  ( 1547200.000,  941700.000) ( 17d54'14.25"W, 26d55'37.74"N)
Upper Right ( 7186400.000, 5416000.000) ( 69d13'59.10"E, 59d59'56.41"N)
Lower Right ( 7186400.000,  941700.000) ( 38d46'25.90"E, 26d37'44.54"N)
Center      ( 4366800.000, 3178850.000) ( 10d39'45.86"E, 51d43'5.40"N)
Band 1 Block=56392x2 Type=Byte, ColorInterp=Palette

(...)


[2]

$ listgeo cdda100.tif
Geotiff_Information:
    Version: 1
    Key_Revision: 1.0
    Tagged_Information:
       ModelTiepointTag (2,3):
          0                0                0
          1547250          5415950          0
       ModelPixelScaleTag (1,3):
          100              100              0
       End_Of_Tags.
    Keyed_Information:
       GTModelTypeGeoKey (Short,1): Undefined
       GTRasterTypeGeoKey (Short,1): RasterPixelIsPoint
       GTCitationGeoKey (Ascii,304): "IMAGINE GeoTIFF Support\nCopyright 
1991 - 2005 by Leica Geosystems Geospatial Imaging, LLC. All Rights 
Reserved\n@(#)$RCSfile: egtf.c $ IMAGINE 9.0 $Revision: 10.0 $ $Date: 
2005/07/26 15:10:00 EST $\nGeocoding information not 
available\nProjection Name = ETRS_1989_LAEA\nUnits = meters\nGeoTIFF 
Units = meters"
       ProjLinearUnitsGeoKey (Short,1): Linear_Meter
       End_Of_Keys.
    End_Of_Geotiff.

Projection Linear Units: 9001/metre (1.000000m)

Corner Coordinates:
Upper Left    ( 1547250.000, 5415950.000)
Lower Left    ( 1547250.000,  941650.000)
Upper Right   ( 7186450.000, 5415950.000)
Lower Right   ( 7186450.000,  941650.000)
Center        ( 4366850.000, 3178800.000)


[3]

$ cat  cdda100.tfw
                  100.00000000000000
                    0.00000000000000
                    0.00000000000000
                 -100.00000000000000
              1547250.00000000000000
              5415950.00000000000000