[GRASS-user] NVIZ - Visualization of buildings

[Markus Neteler]

On Sun, Nov 1, 2009 at 5:46 PM, Markus Neteler <neteler at osgeo.org> wrote:
> On Fri, Oct 30, 2009 at 10:24 AM, incanus <andresfr at unizar.es> wrote:
>>
>> Hi everyone,
>> I'm trying to visualize a DEM that I've generated of the buildings of a
>> city. In each cell I have the meters of elevation. When I try to see it with
>> NVIZ I found that it makes something like interpolation, smoothing the
>> corners like it was a DEM of terrain instead of "hard edges" (i don't know
>> how to say it).
>
> For speed reasons, NVIZ is per default (typically) starting with a
> reduced  visualization.
>
> To increase that:
> Menu: Visualize -> Raster Surface -> Resolution | fine: XXX
>
> The smaller XXX, the higher the shown resolution.
> When XXX=1, then the full resolution as defined by g.region is
> used.


Forgot to mention: some examples here (made without much efforts):

# only Lidar-based DSM + orthophoto:
http://gis.fem-environment.eu/

# Foto versus Lidar-based DSM + orthophoto (nviz)
http://gis.fem-environment.eu/gis-analysis/

cheers
Markus