Mike Leahy wrote:
Hello list,
I'm wondering if anyone has any recommendations for reprojecting a large,
already-tiled RGB GeoTiff image dataset. It's straightforward enough to script
the reprojection of individual tiles, but this leaves black wedges on the
sides. I can merge tiles and add '-n 0' to treat the black wedges as no data,
and the merged output looks fine with no visible black strips, but this is a
dataset that is of the order of 60GB, so merging all of the tiles takes a
particularly long time.
I thought maybe I could use gdal_retile.py...except that doesn't include an
arugment that allow for the exclusion of a particular nodata value in the
output. I figure I could incorporate something to account for nodata into a
customized version of gdal_retile.py script...would anyone have any pointers
for doing this?
Mike,
I would suggest using gdalbuildvrt to build a virtual dataset
referencing all the tiles, and then gdalwarp that. I'd suggested
including "-co TILED=YES" in the gdalwarp command to produce an internally
tiled output GeoTIFF file.
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | Geospatial Programmer for Rent
_______________________________________________
gdal-dev mailing list
gdal-dev@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/gdal-dev
