Re: [GRASS-user] measuring area on a 3d polygon
Thanks, will try this.
On Thu, Nov 17, 2011 at 3:41 AM, Benjamin Ducke wrote:
> I think Michael's reply (see below) to my message is
> actually the answer to your question ;)
>
> Ben
>
> On Wednesday, November 16, 2011 10:13 AM, "Michael Barton"
> wrote:
>> r.surf.area
>>
>> will calculate a topographically corrected area for rasters. So if you
>> convert your vector areas to raster, this will do the trick.
>>
>> Michael
>> __
>> C. Michael Barton
>> Director, Center for Social Dynamics & Complexity
>> Professor of Anthropology, School of Human Evolution & Social Change
>> Arizona State University
>> Tempe, AZ 85287-2402
>> USA
>>
>> voice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)
>> fax: 480-965-7671(SHESC), 480-727-0709 (CSDC)
>> www: http://csdc.asu.edu, http://shesc.asu.edu
>> http://www.public.asu.edu/~cmbarton
>>
>
> --
> Benjamin Ducke
> {*} Geospatial Consultant
> {*} GIS Developer
>
> bendu...@fastmail.fm
>
>
> On Wednesday, November 16, 2011 11:01 AM, "maning sambale"
> wrote:
>> Hi,
>>
>> I have a series polygons located in a mountainous terrain. I can
>> convert the 2d vector into 2.5d using v.drape and a DEM, however, it
>> only converts 2D vector point or line data and not areas. My task is
>> to calculate the area in hectares of the polygon incorporating the
>> elevation/surface of the polygon. I then need to subdivide the main
>> polygon into smaller polygons using a preferred area in hectares.
>>
>> How to calculate 2.5d polygon areas in grass?
>>
>> --
>> cheers,
>> maning
>> --
>> "Freedom is still the most radical idea of all" -N.Branden
>> wiki: http://esambale.wikispaces.com/
>> blog: http://epsg4253.wordpress.com/
>> --
>> ___
>> grass-user mailing list
>> grass-user@lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/grass-user
>>
> ___
> grass-user mailing list
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--
cheers,
maning
--
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
--
___
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Re: [GRASS-user] measuring area on a 3d polygon
I think Michael's reply (see below) to my message is
actually the answer to your question ;)
Ben
On Wednesday, November 16, 2011 10:13 AM, "Michael Barton"
wrote:
> r.surf.area
>
> will calculate a topographically corrected area for rasters. So if you
> convert your vector areas to raster, this will do the trick.
>
> Michael
> __
> C. Michael Barton
> Director, Center for Social Dynamics & Complexity
> Professor of Anthropology, School of Human Evolution & Social Change
> Arizona State University
> Tempe, AZ 85287-2402
> USA
>
> voice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)
> fax: 480-965-7671(SHESC), 480-727-0709 (CSDC)
> www:http://csdc.asu.edu, http://shesc.asu.edu
> http://www.public.asu.edu/~cmbarton
>
--
Benjamin Ducke
{*} Geospatial Consultant
{*} GIS Developer
bendu...@fastmail.fm
On Wednesday, November 16, 2011 11:01 AM, "maning sambale"
wrote:
> Hi,
>
> I have a series polygons located in a mountainous terrain. I can
> convert the 2d vector into 2.5d using v.drape and a DEM, however, it
> only converts 2D vector point or line data and not areas. My task is
> to calculate the area in hectares of the polygon incorporating the
> elevation/surface of the polygon. I then need to subdivide the main
> polygon into smaller polygons using a preferred area in hectares.
>
> How to calculate 2.5d polygon areas in grass?
>
> --
> cheers,
> maning
> --
> "Freedom is still the most radical idea of all" -N.Branden
> wiki: http://esambale.wikispaces.com/
> blog: http://epsg4253.wordpress.com/
> --
> ___
> grass-user mailing list
> grass-user@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
>
___
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] measuring area on a 3d polygon
Hi, I have a series polygons located in a mountainous terrain. I can convert the 2d vector into 2.5d using v.drape and a DEM, however, it only converts 2D vector point or line data and not areas. My task is to calculate the area in hectares of the polygon incorporating the elevation/surface of the polygon. I then need to subdivide the main polygon into smaller polygons using a preferred area in hectares. How to calculate 2.5d polygon areas in grass? -- cheers, maning -- "Freedom is still the most radical idea of all" -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
