[gdal-dev] ecw - file: wrong extent/corner coordinates

[Helmut Kudrnovsky]

hi,

tested with 

OSGeo4W: gdalinfo --version
GDAL 1.11.3, released 2015/09/16

I have several raster ecw files; gdalinfo shows for all the files the same
extent/corner coordinates, although the ecw files are some kind of mosaic
over a larger area. (Also QGIS and GRASS GIS show them in one place
(overlayed one to another)).

example:

the content of the world file: 6617-04.eww

0.2
0.0
0.0
-0.2
653750.1
169999.9

gdalinfo says:

Driver: ECW/ERDAS Compressed Wavelets (SDK 5.0)
Files: 6617-04.ecw
       6617-04.eww
       6617-04.ecw.aux.xml
Size is 6250, 5000
Coordinate System is:
PROJCS["MGI_BMNM34",
    GEOGCS["GCS_MGI",
        DATUM["Militar_Geographische_Institute",
            SPHEROID["Bessel_1841",6377397.155,299.1528128]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",750000.0],
    PARAMETER["False_Northing",-5000000.0],
    PARAMETER["Central_Meridian",16.333333333333],
    PARAMETER["Scale_Factor",1.0],
    PARAMETER["Latitude_Of_Origin",0.0],
    UNIT["Meter",1.0]]
Origin = (0.000000000000000,69.444444444444443)
Pixel Size = (0.013888888888889,-0.013888888888889)
Metadata:
  COLORSPACE=RGB
  COMPRESSION_RATE_TARGET=10
  VERSION=2
Corner Coordinates:
Upper Left  (   0.0000000,  69.4444444) (  6d51'43.49"E, 44d44'46.05"N)
Lower Left  (   0.0000000,   0.0000000) (  6d51'43.85"E, 44d44'43.83"N)
Upper Right (  86.8055556,  69.4444444) (  6d51'47.38"E, 44d44'46.37"N)
Lower Right (  86.8055556,   0.0000000) (  6d51'47.75"E, 44d44'44.15"N)
Center      (  43.4027778,  34.7222222) (  6d51'45.62"E, 44d44'45.10"N)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
  Description = Red
  Overviews: 3125x2500, 1562x1250, 781x625, 390x312, 195x156
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
  Description = Green
  Overviews: 3125x2500, 1562x1250, 781x625, 390x312, 195x156
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue
  Description = Blue
  Overviews: 3125x2500, 1562x1250, 781x625, 390x312, 195x156

and the layer properties in Arcgis says:

<TreeList>
 <Raster_Information>
  <Columns_and_Rows>6250, 5000</Columns_and_Rows>
  <Number_of_Bands>3</Number_of_Bands>
  <Cell_Size__X._Y_>0,2, 0,2</Cell_Size__X._Y_>
  <Uncompressed_Size>89,41 MB</Uncompressed_Size>
  <Format>ECW</Format>
  <Source_Type>Generic</Source_Type>
  <Pixel_Type>unsigned integer</Pixel_Type>
  <Pixel_Depth>8 Bit</Pixel_Depth>
  <NoData_Value></NoData_Value>
  <Colormap>absent</Colormap>
  <Pyramids>level: arbitrary, resampling: Nearest Neighbor</Pyramids>
  <Compression>ECW</Compression>
  <Mensuration_Capabilities>Basic</Mensuration_Capabilities>
  <Status>Permanent</Status>
 </Raster_Information>
 <Extent>
  <Top>170000</Top>
  <Left>653750</Left>
  <Right>655000</Right>
  <Bottom>169000</Bottom>
 </Extent>
 <Spatial_Reference>MGI_BMNM34
  <Linear_Unit>Meter (1,000000)</Linear_Unit>
  <Angular_Unit>Degree (0,0174532925199433)</Angular_Unit>
  <False_Easting>750000</False_Easting>
  <False_Northing>-5000000</False_Northing>
  <Central_Meridian>16,333333333333</Central_Meridian>
  <Scale_Factor>1</Scale_Factor>
  <Latitude_Of_Origin>0</Latitude_Of_Origin>
  <Datum>D_MGI</Datum><
 /Spatial_Reference>
</TreeList>

any ideas?

thanks



-----
best regards
Helmut
--
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