Re: [GRASS-dev] Status of r.cva?
Note that r.cva is really just a convenient way of
calling r.los multiple times and adding the results
for a cumulative viewshed analysis. You can get
the same net result by using r.los or r.viewshed
and r.mapcalc. As far as I recall, the earth curvature
correction is also identical across all modules.
Best,
Ben
--
Benjamin Ducke
{*} Geospatial Consultant
{*} GIS Developer
benducke AT fastmail.fm
On Wed, Jul 3, 2013, at 1:51, Hamish wrote:
Nikos wrote:
a friend needs to use r.cva [0,1] (and r.viewshed [2]). What is the status
of
this add-on? Does it also work in G7? Only in G64 and previous releases?
...
[0] Link https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.cva/
does not exist anymore!
[1] only here: http://www.ucl.ac.uk/~tcrnmar/GIS/r.cva.html ?
As I understand it, Mark's employer (university) would not let him
release the work as GPL-compatible. Otherwise the module would have
replaced r.los in the main GRASS source distribution years ago, and
their institution would have been cited many many times from it, but
oh well, he tried a number of times to convince them.
Considering universities like Johns Hopkins and Columbia literally
generate billions of dollars licensing IP (typically bio-med), and
how underfunded most educational institutions are, you can understand
a bit why the suits at other universities around the world have a
hard time seeing very far past the $ signs for anything and everything.
:-/
Hamish
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Re: [GRASS-dev] Status of r.cva?
On Wednesday 03 of July 2013 20:52:29 Benjamin Ducke wrote: Note that r.cva is really just a convenient way of calling r.los multiple times and adding the results for a cumulative viewshed analysis. You can get the same net result by using r.los or r.viewshed and r.mapcalc. As far as I recall, the earth curvature correction is also identical across all modules. Best, Ben Essential! Thanks, Nikos [rest deleted] ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
[GRASS-dev] Status of r.cva?
Dear Benjamin, a friend needs to use r.cva [0,1] (and r.viewshed [2]). What is the status of this add-on? Does it also work in G7? Only in G64 and previous releases? Thank you, Nikos --- [0] Link https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.cva/ does not exist anymore! [1] only here: http://www.ucl.ac.uk/~tcrnmar/GIS/r.cva.html ? [2] Module/manual exists only for G7 http://grass.osgeo.org/grass70/manuals/r.viewshed.html, not for G64! ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
Re: [GRASS-dev] Status of r.cva?
On Tue, Jul 2, 2013 at 1:15 PM, Nikos Alexandris n...@nikosalexandris.net wrote: a friend needs to use r.cva [0,1] (and r.viewshed [2]). [2] Module/manual exists only for G7 http://grass.osgeo.org/grass70/manuals/r.viewshed.html, not for G64! r.viewshed is available as add-on for G6: http://grasswiki.osgeo.org/wiki/AddOns/GRASS_6#r.viewshed Markus M ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
Re: [GRASS-dev] Status of r.cva?
Nikos Alexandris: ...(and r.viewshed [2]). [2] Module/manual exists only for G7 http://grass.osgeo.org/grass70/manuals/r.viewshed.html, not for G64! Markus Metz wrote: r.viewshed is available as add-on for G6: http://grasswiki.osgeo.org/wiki/AddOns/GRASS_6#r.viewshed Compiles and works :-) Thnx, N ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
Re: [GRASS-dev] Status of r.cva?
Nikos wrote: a friend needs to use r.cva [0,1] (and r.viewshed [2]). What is the status of this add-on? Does it also work in G7? Only in G64 and previous releases? ... [0] Link https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.cva/ does not exist anymore! [1] only here: http://www.ucl.ac.uk/~tcrnmar/GIS/r.cva.html ? As I understand it, Mark's employer (university) would not let him release the work as GPL-compatible. Otherwise the module would have replaced r.los in the main GRASS source distribution years ago, and their institution would have been cited many many times from it, but oh well, he tried a number of times to convince them. Considering universities like Johns Hopkins and Columbia literally generate billions of dollars licensing IP (typically bio-med), and how underfunded most educational institutions are, you can understand a bit why the suits at other universities around the world have a hard time seeing very far past the $ signs for anything and everything. :-/ Hamish ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
