[GRASS-dev] winGRASS OSGeo4W crashes when switching to 3D view

[Anna Petrášová]

Hi,

it crashes because it can't allocate enough memory. There must be some
limit given by the operating system how much memory it can allocate
(altogether and by chunks). I assume the 64-bit version could help with
this.
If you run
m.nviz.image elevation_map=elevation output=xxx format=ppm size=640,480

with large regions, you will get:
Loading raster map <elevation at PERMANENT>...
Current region rows: 13500, cols: 15000
ERROR: G_malloc: unable to allocate 810000000 bytes of memory

Anna

On Mon, Dec 28, 2015 at 4:25 AM, Helmut Kudrnovsky <hellik at web.de> wrote:

> Markus Neteler wrote
> > Hi,
> >
> > while teaching our IRSAE course
> > (http://gis.cri.fmach.it/grass-gis-and-r-course/) we did not have
> > success to perform a NVIZ exercise on Windows.
> >
> > Switching to 3D mode leads to a GUI crash when loading the "elevation"
> > DEM. We used "elevation" in the new (yet to be improved) Piemont
> > location [1].
> > No error message shown, just crash.
> >
> > If anyone wants to test:
> >
> > wget http://geodati.fmach.it/gfoss_geodata/grassdata_course_version1.7z
> >
> > # unpack (7a is contained eg in p7zip-plugins package):
> > 7z x grassdata_course_version1.7z
> >
> > --> grassdata_piemonte/user1
> >
> > Note: It is a new issue since 7.0.1, in 7.0.0 which is installed on
> > the same machine no such issue.
> >
> > I suspect that it is the elevation map size causing the issue since
> > the DEM is larger than that of the NC dataset.
> >
> > Markus
>
> I confirm this. in large regions, 3D view crashes.
>
> tested here with
>
> System Info
> GRASS Version: 7.0.2
>
> and
>
> System Info
> GRASS Version: 7.1.svn
>
> and the piemonte data set (but also with other large rasters):
>
> g.region -p -a raster=elevation at PERMANENT align=elevation at PERMANENT
> projection: 1 (UTM)
> zone:       32
> datum:      wgs84
> ellipsoid:  wgs84
> north:      5146000
> south:      4879500
> west:       313000
> east:       517000
> nsres:      25
> ewres:      25
> rows:       10660
> cols:       8160
> cells:      86985600
>
> attached a debug=3 output ( wxnviz_debug.txt
> <http://osgeo-org.1560.x6.nabble.com/file/n5243063/wxnviz_debug.txt>  )
>
>
>
>
>
>
> -----
> best regards
> Helmut
> --
> View this message in context:
> http://osgeo-org.1560.x6.nabble.com/winGRASS-OSGeo4W-crashes-when-switching-to-3D-view-tp5243039p5243063.html
> Sent from the Grass - Dev mailing list archive at Nabble.com.
> _______________________________________________
> grass-dev mailing list
> grass-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-dev/attachments/20151229/a703746b/attachment.html>