[GRASS-user] Re: Patch raster maps very slow - Is there a way to speed this up?

[Hermann Peifer]

I would try to warp & patch the data with GDAL command line tools (gdalwarp in this case), then import the result into GRASS.

See also  http://trac.osgeo.org/gdal/wiki/UserDocs/GdalWarp#WillincreasingRAMincreasethespeedofgdalwarp

Hermann

-------- Original Message  --------
Subject: Patch raster maps very slow - Is there a way to speed   this up?
From: stephen sefick <ssefick at gmail.com>
To: 
Date: 11/01/2010 14:20

> I have generated DEM tiles (65ish) from LIDAR data in its natural
> projection NC state plane feet (the area covered is about 300 squared
> miles).  I have reprojected them into UTM 17 nad 83.  These DEMs are
> 1m resolution.  I am using r.patch and it has been running for three
> days now and it is 45% done...  Would it be faster to stop this
> process, patch them in there native projection and then reproject them
> to UTM?  I am running GRASS 6.5.
> kind regards,
>