On Mon, Apr 5, 2010 at 2:20 PM, William Kyngesburye <wokl...@kyngchaos.com>wrote:
> I thinking of creating a vrt for approx 19000 geotiff DEM tiles (SRTM). > Any comments on the performance or practicality of this? Is there a > difference in performance between Geotiff and GRASS as the tile format? > > Mainly it's so I can easily extract regions for projects, so it would be > one-shot gdal_translate runs. > > I've done something similar. Check out the SourceProperties tag in http://www.gdal.org/gdal_vrttut.html. If you specify that for each source image, then GDAL doesn't have to open all 19000 images at runtime. The performance is quite good. --Matt
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