There are probably several different ways to approach this, the
following are 2 that have worked for me in the past when gdal_merge.py
has had problems.<br>
<br>
1) Assuming all of the tiles are in the same projection and resolution, use gdalwarp to create the mosaic.<br>
or<br>
2) Since you are using version 1.6.1 of gdal, you could try using the
"gdalbuildvrt" utility to create a virtual mosaic. I suspect it might
be possible to use the VRT as the input source to create overviews. <br>--<br><br><br><div class="gmail_quote">On Fri, Jun 26, 2009 at 12:46 AM, Pavel Iacovlev <span dir="ltr"><<a href="mailto:iacovlev.pavel@gmail.com">iacovlev.pavel@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Good day all,<br>
<br>
I am trying to merge a large data set, the input imagery is 1TB RGB<br>
uncompressed tifs (lots of them). Then I run gdal_merge.py on a small<br>
data set it runs ok and with -v option I can see whats happening. But<br>
then I run on a large dataset I don't get no verbose output (I don't<br>
get no output at all) and it stuck on 8.9 GB image size. I can just<br>
track that the image is getting bigger but not verbose output<br>
whatsoever and I can tell why it stops on 8.9 GB.<br>
<br>
My command is: gdal_merge.py -v -init 255 -of GTiff -co TILED=YES -co<br>
COMPRESS=JPEG -co PHOTOMETRIC=YCBCR -co BIGTIFF=YES -o of.tif of/*.tif<br>
<br>
The input images are around 160mb each so loading them 1 by 1 into<br>
memory is not a problem.<br>
<br>
I want to join all this imagery into 1 big tif and create overviews to<br>
serve it via mapserver.<br>
<br>
GDAL version: GDAL 1.6.1, released 2009/05/11<br>
<font color="#888888"><br>
--<br>
<a href="http://iap.md" target="_blank">http://iap.md</a>, The future is open<br>
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