[GRASS-user] hydro-flatenning process ?

GRASS GRASS user
1

Hello,

From a dem file (breaklines), i would like apply hydro-flatenning process.

Is it possible to do that with grass?

Thanks.

Regards.

Laurent.

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2

From a dem file (breaklines), i would like apply hydro-flatenning process.

Is it possible to do that with grass?

I would like define an hydrologic topology on my DEM. Each cellul of my

raster should have a topologic

component. My goal is to flatten waterway areas 's values.

r.in.xyz
http://grass.osgeo.org/grass64/manuals/r.in.xyz.html

r.surf.idw
http://grass.osgeo.org/grass64/manuals/r.surf.idw.html

v.surf.bspline
http://grass.osgeo.org/grass64/manuals/v.surf.bspline.html

v.surf.rst
http://grass.osgeo.org/grass64/manuals/v.surf.rst.html

?

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best regards
Helmut
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3

Helmut Kudrnovsky wrote

r.in.xyz

r.surf.idw

v.surf.bspline

v.surf.rst

None of these, or any of GRASS's other surface interpolation tools that I'm
aware of, consider breaklines. Although a feature request was filed 4 years
ago: http://trac.osgeo.org/grass/ticket/793

You could probably generate hydro flattened surfaces separately and combine
them with the DEM manually using the raster calculator, but unfortunately I
don't think there is a one click button.

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4

Jed wrote:

None of these, or any of GRASS's other surface interpolation tools that
I'm aware of, consider breaklines. Although a feature request was filed
4 years ago: http://trac.osgeo.org/grass/ticket/793

see the v.triangle addon module,
http://grasswiki.osgeo.org/wiki/TIN_with_breaklines

ticket updated. (breaklines in v.surf.rst would still be awesome :slight_smile:

Hamish