#3622: r.out.gdal export in USGSDEM format takes very long time and finally
crashes
-------------------------+-------------------------------------------------
Reporter: dido | Owner: grass-dev@…
Type: defect | Status: new
Priority: critical | Milestone:
Component: Raster | Version: 7.4.0
Resolution: | Keywords: r.out.gdal export USGSDEM long time
| crashes
CPU: x86-64 | Platform: MSWindows 7
-------------------------+-------------------------------------------------
Comment (by dido):
GeoTIFF export runs fine, producing a 10G file. I chose to export to USGS
DEM because I expect a tenfold decrease in file size. At least that can be
observed if I do a DEM export of the same 10G GeoTIFF using e.g.
GlobalMapper.
I don't have an idea if the MEM driver will handle raster this big. My PC
has 16G of physical RAM and quite enough virtual memory.
Precision loss is fine for me as the input raster is also int16. I suppose
GRASS uses 64 bit floats internally (DCELL) and the truncation to int16
will be handled by the export driver. Actually loss of speed due to
truncation calculations is not an issue - GeoTIFF export runs for a quite
reasonable time.
--
Ticket URL: <https://trac.osgeo.org/grass/ticket/3622#comment:2>
GRASS GIS <https://grass.osgeo.org>
_______________________________________________
grass-dev mailing list
grass-dev@lists.osgeo.org
https://lists.osgeo.org/mailman/listinfo/grass-dev
