Laura, From the error message, I guess you are running gdalwarp on a remote server through a ssh connexion. There's probably a timeout that occurs since your operation takes hours. You should check the ssh options of the client/server for that.
In your use case, if you just want to create a mosaic of SRTM files and not really warp them, you'd better use gdalbuildvrt to create quickly a VRT file (XML-based) and then translate it to geotiff. This should run much faster than gdalwarp. But the 432001P x 40801L output size will remain. As it is huge, it will also likely take some time ! gdalbuildvrt mosaic.vrt *hgt gdal_translate mosaic.vrt mosaic.tif If you only use the mosaic with GDAL enabled tools, you can skip the gdal_translate step. That will save space (17.6 GB!) and time (a few seconds v.s. several hours). Best regards, Even Le Monday 01 June 2009 19:58:44 Laura Toma, vous avez écrit : > Hi, > > I am trying to create a large DEM from SRTM3 data. I have a folder > 'australia' which includes 1060 .hgt tiles downloaded from > 'rome0srp01u.ecs.nasa.gov/', and I am trying to create a tiff for all > the tiles in this folder. > > I have tried to run 'gdalwarp' several times and every time the > server gets reset (see below) after processing the first .hgt file. > The tiles are not that large (i think i3600x3600), but processing the > first tile takes hours. > > Has anybody tried anything similar? Am I doing something wrong? Any > advise would be greatly appreciated. > > thanks, > Laura > > > gdalwarp *hgt srtm_mosaik_australasia.tiff > > Creating output file that is 432001P x 40801L. > Processing input file S11E119.hgt. > Using internal nodata values (eg. -32768) for image S11E119.hgt. > 0...10...20...30...40...50...60..Read from remote host cod: Connection > reset by peer > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
