[gdal-dev] gdal_merge does not mosaic

[Frank Warmerdam]

Hi,

GDAL 1.4.5 is ancient.  Consider upgrading.  The last release was 1.10.0.

Your commandline looks ok.  Without knowing much about your input images or
what your output looks like it is hard to judge what went wrong.

Are img1.img, img2.img and img3.img spatially distinct?  Is the produced
mosaic the right extents to hold all the input images?

One thing to keep in mind is that if mosaic.img already exists it will just
be written into, not recreated.  So if you created it once with the wrong
size, subsequent runs won't recreate it the right size for everything.

Best regards,
Frank


On Thu, May 30, 2013 at 10:36 PM, adi_khan <adiba.nizami at gmail.com> wrote:

> I am using gdal 1.4.5 and wish to use gdal_merge to mosaic *.img images.
>
> The command runs successfully (no error is reported) but the output file
> contains the last input image and not mosaiced output.
> I use openEV to see the output file.
>
> This is how is used the command :
>
> gdal_merge.py -of HFA -o mosaic.img  img1.img img2.img img3.img
>
>
>
>
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I set the clouds in motion - turn up   | Frank Warmerdam,
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and watch the world go round - Rush    | Geospatial Software Developer
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