Milton Cezar Ribeiro wrote: > I would like to know if it is possible I make an map algebra > when importing a .IMG file. As I am working with native wingrass, > and the LFS (Large File System), almost to where I know, don´t > suport my large files (12GB),
I don't know if the WinGRASS binaries were built with LFS support turned on or not. Also memory requirements of r.in.gdal, most raster modules are very good with large maps, but a few are not. > I would like to divide my 32Bits > image by 200, and generate and raster map on 16bits. > I know that if I divide my original IMG map by 200 on ERDAS > and import it on GRASS the size of resulting file works > find on my current system. perhaps use gdal_translate to split it up into a series of smaller tiles, then import each individually- The general way to make a 1280x1024 tile is like: gdal_translate -srcwin $XOFFSET $YOFFSET 1280 1024 source.img out.tif I have a script here which uses that, maybe could be adapted: http://hamish.bowman.googlepages.com/gpsdrivefiles#tiles Hamish _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
