[GRASS-dev] Apply for write access to the GRASS-Addons-SVN repositor

GRASS GRASS developer
1

Dear GRASS developers,

I would like to apply for write access to the GRASS-Addons-SVN repository.

I was looking for a faster v.rast.stats implementation to calculate
univariate statistics based on vector polygons, because I need to do this for
large raster maps and the current v.rast.stats is just too slow.

In the GRASS-Addons-SVN repository I found r.univar.zonal [1] from Markus
Metz, so I adapted the script v.rast.stats to use r.univar.zonal. The result
v.rast.stats2 is a lot faster. See test with spearfish below:

# current v.rast.stats
time v.rast.stats -c -e vector=fields raster=elevation.10m col=elev
real 2m6.139s
user 2m1.616s
sys 0m4.464s

# v.rast.stats2 based on r.univar.zonal
time v.rast.stats_neu -c -e vector=fields raster=elevation.10m col=elev
real 0m3.249s
user 0m2.784s
sys 0m0.444s

[1] http://grass.osgeo.org/wiki/GRASS_AddOns#r.univar.zonal

I would be happy, if the script v.rast.stats2 and r.univar.zonal from Markus
Metz would finally, after an incubation phase, make it into the sources for
GRASS future versions.

thanks a lot
Otto

2

(cc grass-psc)

On Mon, Jan 11, 2010 at 10:10 AM, Otto Dassau <otto.dassau@gmx.de> wrote:

Dear GRASS developers,

I would like to apply for write access to the GRASS-Addons-SVN repository.

I was looking for a faster v.rast.stats implementation to calculate
univariate statistics based on vector polygons, because I need to do this for
large raster maps and the current v.rast.stats is just too slow.

In the GRASS-Addons-SVN repository I found r.univar.zonal [1] from Markus
Metz, so I adapted the script v.rast.stats to use r.univar.zonal. The result
v.rast.stats2 is a lot faster. See test with spearfish below:

# current v.rast.stats
time v.rast.stats -c -e vector=fields raster=elevation.10m col=elev
real 2m6.139s
user 2m1.616s
sys 0m4.464s

# v.rast.stats2 based on r.univar.zonal
time v.rast.stats_neu -c -e vector=fields raster=elevation.10m col=elev
real 0m3.249s
user 0m2.784s
sys 0m0.444s

[1] http://grass.osgeo.org/wiki/GRASS_AddOns#r.univar.zonal

I would be happy, if the script v.rast.stats2 and r.univar.zonal from Markus
Metz would finally, after an incubation phase, make it into the sources for
GRASS future versions.

thanks a lot
Otto

Dear Otto,

this sounds great. We would need the magical phrase related to RFC2
from you, see
http://trac.osgeo.org/grass/wiki/HowToContribute#WriteaccesstotheGRASS-Addons-SVNrepository

Then we can activate your account.

Best,
Markus

3

Hi,

Am Tue, 12 Jan 2010 00:26:55 +0100
schrieb Markus Neteler <neteler@osgeo.org>:

(cc grass-psc)

On Mon, Jan 11, 2010 at 10:10 AM, Otto Dassau <otto.dassau@gmx.de>
wrote:
> Dear GRASS developers,
>
> I would like to apply for write access to the GRASS-Addons-SVN
> repository.
>
> I was looking for a faster v.rast.stats implementation to calculate
> univariate statistics based on vector polygons, because I need to
> do this for large raster maps and the current v.rast.stats is just
> too slow.
>
> In the GRASS-Addons-SVN repository I found r.univar.zonal [1] from
> Markus Metz, so I adapted the script v.rast.stats to use
> r.univar.zonal. The result v.rast.stats2 is a lot faster. See test
> with spearfish below:
>
> # current v.rast.stats
> time v.rast.stats -c -e vector=fields raster=elevation.10m col=elev
> real 2m6.139s
> user 2m1.616s
> sys 0m4.464s
>
> # v.rast.stats2 based on r.univar.zonal
> time v.rast.stats_neu -c -e vector=fields raster=elevation.10m
> col=elev real 0m3.249s
> user 0m2.784s
> sys 0m0.444s
>
> [1] http://grass.osgeo.org/wiki/GRASS_AddOns#r.univar.zonal
>
> I would be happy, if the script v.rast.stats2 and r.univar.zonal
> from Markus Metz would finally, after an incubation phase, make it
> into the sources for GRASS future versions.
>
> thanks a lot
> Otto

Dear Otto,

this sounds great. We would need the magical phrase related to RFC2
from you, see
http://trac.osgeo.org/grass/wiki/HowToContribute#WriteaccesstotheGRASS-Addons-SVNrepository

I read and accept the "Legal aspects of code contributions (RFC2)".

my OSGEO ID is dassau

thanks a lot
  Otto

Then we can activate your account.

Best,
Markus

4

On Tue, Jan 12, 2010 at 8:19 AM, Otto Dassau <otto.dassau@gmx.de> wrote:

Am Tue, 12 Jan 2010 00:26:55 +0100
schrieb Markus Neteler <neteler@osgeo.org>:

(cc grass-psc)

On Mon, Jan 11, 2010 at 10:10 AM, Otto Dassau <otto.dassau@gmx.de>
wrote:
> Dear GRASS developers,
>
> I would like to apply for write access to the GRASS-Addons-SVN
> repository.

...

> I would be happy, if the script v.rast.stats2 and r.univar.zonal
> from Markus Metz would finally, after an incubation phase, make it
> into the sources for GRASS future versions.
>
> thanks a lot
> Otto

Dear Otto,

this sounds great. We would need the magical phrase related to RFC2
from you, see
http://trac.osgeo.org/grass/wiki/HowToContribute#WriteaccesstotheGRASS-Addons-SVNrepository

I read and accept the "Legal aspects of code contributions (RFC2)".

my OSGEO ID is dassau

I have activated your GRASS-Addons SVN account (full PSC approval
is only needed for write access to GRASS-Main SVN).

Happy hacking,
Markus