[GRASS-dev] wxGUI GRASS 7: how to drape a map over a DEM?

Helena Mitasova hmitaso at ncsu.edu
Sun May 26 06:47:05 PDT 2013

I have updated the videos for wxnviz including working with multiple surfaces, color draping and adding a constant surface
and cutting planes here:
you can see there wxnviz and old nviz side-by-side.

I will re-do the videos once we have a final release of 6.4.3

The only thing that you need to be aware of is that in GRASS6 change in region is ignored by wxnviz - it always
uses the region which was set when you first switched to it. You need to quit wxgui, change region and restart wxgui.
In GRASS7 region can be changed - one more reason to have GRASS7 pre-release.

Anna please correct me if I am wrong in anything above.

I hope this helps, Helena

Helena Mitasova
Associate Professor
Department of Marine, Earth, and Atmospheric Sciences
2800 Faucette Drive, Rm. 1125 Jordan Hall
North Carolina State University
Raleigh, NC 27695-8208
hmitaso at ncsu.edu

"All electronic mail messages in connection with State business which are sent to or received by this account are subject to the NC Public Records Law and may be disclosed to third parties.” 

On May 26, 2013, at 7:16 AM, Markus Metz wrote:

> On Sun, May 26, 2013 at 11:21 AM, Anna Petrášová <kratochanna at gmail.com> wrote:
>> On Sun, May 26, 2013 at 11:08 AM, Markus Metz
>> <markus.metz.giswork at gmail.com> wrote:
>>> On Sun, May 26, 2013 at 10:32 AM, Anna Petrášová <kratochanna at gmail.com>
>>> wrote:
>>>> The problem why you don't see anything when you load both maps is that
>>>> flowacc has large extreme values, so the initial view is confused.
>>>> Anyway
>>>> you should be able see something when you adjust the view to some normal
>>>> height.
>>> That means I can not change the raster map to be used as surface?
>>> Because I see that two different surfaces are used after updating,
>>> resetting, and changing height to a reasonable value, even though only
>>> one surface map is given. BTW, nviz in 6.x accepts multiple raster
>>> maps as surfaces.
>> Sorry, I don't really understand what you mean. You can display more
>> surfaces, you can unload (uncheck or remove) surface and add new.
> OK, got it. All active raster maps in the layer manager are loaded as surfaces.
> Markus M
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