[gdal-dev] Problem with gdal_translate and specific ECW file [SEC=UNCLASSIFIED]

[Andrew Williams]

Got it in one Luke.

Thanks mate.

From: Pinner, Luke [mailto:Luke.Pinner at environment.gov.au]
Sent: Monday, 2 July 2012 12:52 PM
To: Andrew Williams
Subject: RE: Problem with gdal_translate and specific ECW file [SEC=UNCLASSIFIED]

I've had trouble with the old ECW 3.3 (from 2006) library that is included in FWTOOLS before.  FWTOOLS itself is pretty old (last release 2010, can't remember what GDAL version). OSGEO4W is usually now recommended for a "batteries included" GDAL install on Windows.

http://trac.osgeo.org/osgeo4w

OSGEO4W includes the ECW plugin but because of the slightly more onerous licensing of the latest ERDAS ECW/JP2 SDK (v. 4.2), you need to download the SDK from ERDAS yourself and copy the dlls into your OSGEOW installation:

http://trac.osgeo.org/osgeo4w/wiki/pkg-gdal-ecw

Regards,
Luke Pinner

From: gdal-dev-bounces at lists.osgeo.org<mailto:gdal-dev-bounces at lists.osgeo.org> [mailto:gdal-dev-bounces at lists.osgeo.org]<mailto:[mailto:gdal-dev-bounces at lists.osgeo.org]> On Behalf Of Andrew Williams
Sent: Monday, 2 July 2012 12:17 PM
To: gdal-dev at lists.osgeo.org<mailto:gdal-dev at lists.osgeo.org>
Subject: [gdal-dev] Problem with gdal_translate and specific ECW file

Folks,
I have an ECW which was supplied as a set of 4 from the same supplier.

As part of a process to make the image usable with a legacy system I create a series of tiles from the ECW as GTIFF.

I have done this successfully many times.

3 of the 4 images processed without issue.

One however causes gdal_translate to crash completely.

Gdalinfo returns the following

Driver: ECW/ERMapper Compressed Wavelets
Files: C:\Current Projects\image.ecw
Size is 330000, 170000
Coordinate System is:
PROJCS["MGA55",
    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",147],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",10000000],
    UNIT["Meter",1]]
Origin = (285999.999998596960000,5812000.000001333700000)
Pixel Size = (0.100000000000000,-0.100000000000000)
Corner Coordinates:
Upper Left  (  286000.000, 5812000.000) (144d34'7.92"E, 37d48'51.61"S)
Lower Left  (  286000.000, 5795000.000) (144d33'49.77"E, 37d58'2.71"S)
Upper Right (  319000.000, 5812000.000) (144d56'36.67"E, 37d49'17.31"S)
Lower Right (  319000.000, 5795000.000) (144d56'21.31"E, 37d58'28.55"S)
Center      (  302500.000, 5803500.000) (144d45'13.88"E, 37d53'40.58"S)
Band 1 Block=330000x1 Type=Byte, ColorInterp=Red
  Overviews: arbitrary
Band 2 Block=330000x1 Type=Byte, ColorInterp=Green
  Overviews: arbitrary
Band 3 Block=330000x1 Type=Byte, ColorInterp=Blue
  Overviews: arbitrary

This is an example of the gdal_translate command line run from FWTOOLS Shell

gdal_translate -of GTIFF -projwin 286000 5796000 287000 5795000 "C:\Current Projects\image.ecw" "C:\Current Projects\image1.TIF"

Running this process begins and gets this far

Input file size is 330000, 170000
Computed -srcwin 0 160000 10000 10000 from projected window.
0

I have tried other -proj windows in the set, all crash.

Bear in mind the same command line pattern was used for three other images successfully.

I have tried two different PCs with the same result.

I suspect the image itself but not sure what it might be.

The image is quite large (4.7Gb) so sending it to someone for analysis will be difficult.

Any advice appreciated.

Andrew


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