I need to create a histogram equalized color table for a set of rasters. I can use r.colors for each raster individually but then the color tables are not comparable across the maps. Any suggestions on how to create a color table across multiple rasters?
Thanks,
Jitu
Hi list,
does anyone know if there is a way to compute the upslope drainage contributing areas along a stream?
thanks for your help!
Francesco
Hello Francesco,
you could use something like the AddOn r.stream.basin (http://grass.osgeo.org/wiki/R.stream.*)
to delineate the basins. Every basin gets a unique number. Afterwards you can just query how
many cells do have a certain number.
best regards!
Am 13.10.2011 um 08:20 schrieb Francesco Mirabella:
Hi list,
does anyone know if there is a way to compute the upslope drainage contributing areas along a stream?thanks for your help!
Francesco_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
It depends on what the OP was looking for - it sounds to me that he is looking for a kind of “dynamic” approach, where one can determine the upslope drainage area for an arbitrary location. Unfortunately, I don’t have a solution, but would be quite interested in the answer.
Cheers,
Rainer
On Thu, Oct 13, 2011 at 8:36 AM, Johannes Radinger <jradinger@gmx.at> wrote:
Hello Francesco,
you could use something like the AddOn r.stream.basin (http://grass.osgeo.org/wiki/R.stream.*)
to delineate the basins. Every basin gets a unique number. Afterwards you can just query how
many cells do have a certain number.best regards!
Am 13.10.2011 um 08:20 schrieb Francesco Mirabella:Hi list,
does anyone know if there is a way to compute the upslope drainage contributing areas along a stream?thanks for your help!
Francesco
grass-user mailing list
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http://lists.osgeo.org/mailman/listinfo/grass-user
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–
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)
Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa
Tel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44
Fax (D): +49 - (0)3 21 21 25 22 44
email: Rainer@krugs.de
Skype: RMkrug
Hello,
and thanks for your fast replies,
yes, the final result which I'd like to get is a river profile along which the values of the upslope contributing areas can be plotted on a separate y axis.
In order to get this I suppose I should be able to "cat river_long_profile_ascii | r.profile a_raster_map_containing_the upslope_areas" which can provide values in square meters or square km or whatever.
Do you know if such a raster map can be obtained from a dem?
Francesco
Rainer M Krug wrote:
It depends on what the OP was looking for - it sounds to me that he is looking for a kind of "dynamic" approach, where one can determine the upslope drainage area for an arbitrary location. Unfortunately, I don't have a solution, but would be quite interested in the answer.
Cheers,
Rainer
On Thu, Oct 13, 2011 at 8:36 AM, Johannes Radinger <jradinger@gmx.at <mailto:jradinger@gmx.at>> wrote:
Hello Francesco,
you could use something like the AddOn r.stream.basin
(http://grass.osgeo.org/wiki/R.stream.*)
to delineate the basins. Every basin gets a unique number.
Afterwards you can just query how
many cells do have a certain number.best regards!
Am 13.10.2011 <tel:13.10.2011> um 08:20 schrieb Francesco Mirabella:> Hi list,
> does anyone know if there is a way to compute the upslope
drainage contributing areas along a stream?
>
> thanks for your help!
> Francesco
>
> _______________________________________________
> grass-user mailing list
> grass-user@lists.osgeo.org <mailto:grass-user@lists.osgeo.org>
> http://lists.osgeo.org/mailman/listinfo/grass-user_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org <mailto:grass-user@lists.osgeo.org>
http://lists.osgeo.org/mailman/listinfo/grass-user--
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)Centre of Excellence for Invasion Biology
Stellenbosch University
South AfricaTel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44Fax (D): +49 - (0)3 21 21 25 22 44
email: Rainer@krugs.de <mailto:Rainer@krugs.de>
Skype: RMkrug
On Thu, Oct 13, 2011 at 9:04 AM, Francesco Mirabella <mirabell@unipg.it> wrote:
Hello,
and thanks for your fast replies,
yes, the final result which I’d like to get is a river profile along which the values of the upslope contributing areas can be plotted on a separate y axis.
In order to get this I suppose I should be able to “cat river_long_profile_ascii | r.profile a_raster_map_containing_the upslope_areas” which can provide values in square meters or square km or whatever.
Do you know if such a raster map can be obtained from a dem?
Possibly r.flow could help here - in the manual:
################
There are three possible output maps which can be produced in any combination simultaneously: a vector map flout of flowlines, a raster map lgout of flowpath lengths, and a raster map dsout of flowline densities (which are equal upslope contributed areas per unit width, when multiplied by resolution).
################
If you need it more accurate, maybe use r.drain for each cell and add the flowpaths accordingly.
Cheers,
Rainer
Francesco
Rainer M Krug wrote:
It depends on what the OP was looking for - it sounds to me that he is looking for a kind of “dynamic” approach, where one can determine the upslope drainage area for an arbitrary location. Unfortunately, I don’t have a solution, but would be quite interested in the answer.
Cheers,
Rainer
On Thu, Oct 13, 2011 at 8:36 AM, Johannes Radinger <jradinger@gmx.at mailto:[jradinger@gmx.at](mailto:jradinger@gmx.at)> wrote:
Hello Francesco,
you could use something like the AddOn r.stream.basin
(http://grass.osgeo.org/wiki/R.stream.*)
to delineate the basins. Every basin gets a unique number.
Afterwards you can just query how
many cells do have a certain number.best regards!
Am 13.10.2011 tel:13.10.2011 um 08:20 schrieb Francesco Mirabella:
Hi list,
does anyone know if there is a way to compute the upslope
drainage contributing areas along a stream?thanks for your help!
Francesco
grass-user mailing list
grass-user@lists.osgeo.org mailto:[grass-user@lists.osgeo.org](mailto:grass-user@lists.osgeo.org)
grass-user mailing list
grass-user@lists.osgeo.org mailto:[grass-user@lists.osgeo.org](mailto:grass-user@lists.osgeo.org)
http://lists.osgeo.org/mailman/listinfo/grass-user
–
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)Centre of Excellence for Invasion Biology
Stellenbosch University
South AfricaTel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44Fax (D): +49 - (0)3 21 21 25 22 44
email: Rainer@krugs.de mailto:[Rainer@krugs.de](mailto:Rainer@krugs.de)
Skype: RMkrug
–
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)
Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa
Tel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44
Fax (D): +49 - (0)3 21 21 25 22 44
email: Rainer@krugs.de
Skype: RMkrug
On Thu, Oct 13, 2011 at 9:41 AM, Rainer M Krug <r.m.krug@gmail.com> wrote:
On Thu, Oct 13, 2011 at 9:04 AM, Francesco Mirabella <mirabell@unipg.it>
wrote:Hello,
and thanks for your fast replies,
yes, the final result which I'd like to get is a river profile along which
the values of the upslope contributing areas can be plotted on a separate y
axis.
In order to get this I suppose I should be able to "cat
river_long_profile_ascii | r.profile a_raster_map_containing_the
upslope_areas" which can provide values in square meters or square km or
whatever.
Do you know if such a raster map can be obtained from a dem?Possibly r.flow could help here - in the manual:
################
There are three possible output maps which can be produced in any
combination simultaneously: a vector map flout of flowlines, a raster map
lgout of flowpath lengths, and a raster map dsout of flowline densities
(which are equal upslope contributed areas per unit width, when multiplied
by resolution).
################
Another possibility to get total upslope contributing area for each
cell is the flow accumulation output of r.watershed and r.terraflow.
Upslope contributing areas for arbitrary points can be determined with
r.stream.basins, or one point after another with r.water.outlet. These
modules use drainage direction produced by r.watershed as input.
HTH,
Markus M
Rainer M Krug wrote:
It depends on what the OP was looking for - it sounds to me that he is
looking for a kind of "dynamic" approach, where one can determine the
upslope drainage area for an arbitrary location. Unfortunately, I don't have
a solution, but would be quite interested in the answer.Cheers,
Rainer
On Thu, Oct 13, 2011 at 8:36 AM, Johannes Radinger <jradinger@gmx.at
<mailto:jradinger@gmx.at>> wrote:Hello Francesco,
you could use something like the AddOn r.stream.basin
(http://grass.osgeo.org/wiki/R.stream.*)
to delineate the basins. Every basin gets a unique number.
Afterwards you can just query how
many cells do have a certain number.best regards!
Am 13.10.2011 <tel:13.10.2011> um 08:20 schrieb Francesco Mirabella:> Hi list, > does anyone know if there is a way to compute the upslopedrainage contributing areas along a stream?
>
> thanks for your help!
> Francesco
>
>
>
>
> _______________________________________________
> grass-user mailing list
> grass-user@lists.osgeo.org <mailto:grass-user@lists.osgeo.org>
> http://lists.osgeo.org/mailman/listinfo/grass-user_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org <mailto:grass-user@lists.osgeo.org>
http://lists.osgeo.org/mailman/listinfo/grass-user--
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)Centre of Excellence for Invasion Biology
Stellenbosch University
South AfricaTel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44Fax (D): +49 - (0)3 21 21 25 22 44
email: Rainer@krugs.de <mailto:Rainer@krugs.de>
Skype: RMkrug
--
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology,
UCT), Dipl. Phys. (Germany)Centre of Excellence for Invasion Biology
Stellenbosch University
South AfricaTel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44Fax (D): +49 - (0)3 21 21 25 22 44
email: Rainer@krugs.de
Skype: RMkrug
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
Many thnaks to all,
I 'll try and see what I get
cheers
Francesco
Markus Metz wrote:
On Thu, Oct 13, 2011 at 9:41 AM, Rainer M Krug <r.m.krug@gmail.com> wrote:
On Thu, Oct 13, 2011 at 9:04 AM, Francesco Mirabella <mirabell@unipg.it>
wrote:Hello,
and thanks for your fast replies,
yes, the final result which I'd like to get is a river profile along which
the values of the upslope contributing areas can be plotted on a separate y
axis.
In order to get this I suppose I should be able to "cat
river_long_profile_ascii | r.profile a_raster_map_containing_the
upslope_areas" which can provide values in square meters or square km or
whatever.
Do you know if such a raster map can be obtained from a dem?Possibly r.flow could help here - in the manual:
################
There are three possible output maps which can be produced in any
combination simultaneously: a vector map flout of flowlines, a raster map
lgout of flowpath lengths, and a raster map dsout of flowline densities
(which are equal upslope contributed areas per unit width, when multiplied
by resolution).
################Another possibility to get total upslope contributing area for each
cell is the flow accumulation output of r.watershed and r.terraflow.Upslope contributing areas for arbitrary points can be determined with
r.stream.basins, or one point after another with r.water.outlet. These
modules use drainage direction produced by r.watershed as input.HTH,
Markus M
Rainer M Krug wrote:
It depends on what the OP was looking for - it sounds to me that he is
looking for a kind of "dynamic" approach, where one can determine the
upslope drainage area for an arbitrary location. Unfortunately, I don't have
a solution, but would be quite interested in the answer.Cheers,
Rainer
On Thu, Oct 13, 2011 at 8:36 AM, Johannes Radinger <jradinger@gmx.at
<mailto:jradinger@gmx.at>> wrote:Hello Francesco,
you could use something like the AddOn r.stream.basin
(http://grass.osgeo.org/wiki/R.stream.*)
to delineate the basins. Every basin gets a unique number.
Afterwards you can just query how
many cells do have a certain number.best regards!
Am 13.10.2011 <tel:13.10.2011> um 08:20 schrieb Francesco Mirabella:> Hi list,
> does anyone know if there is a way to compute the upslope
drainage contributing areas along a stream?
>
> thanks for your help!
> Francesco
>
> _______________________________________________
> grass-user mailing list
> grass-user@lists.osgeo.org <mailto:grass-user@lists.osgeo.org>
> http://lists.osgeo.org/mailman/listinfo/grass-user_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org <mailto:grass-user@lists.osgeo.org>
http://lists.osgeo.org/mailman/listinfo/grass-user--
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)Centre of Excellence for Invasion Biology
Stellenbosch University
South AfricaTel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44Fax (D): +49 - (0)3 21 21 25 22 44
email: Rainer@krugs.de <mailto:Rainer@krugs.de>
Skype: RMkrug
--
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology,
UCT), Dipl. Phys. (Germany)Centre of Excellence for Invasion Biology
Stellenbosch University
South AfricaTel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44Fax (D): +49 - (0)3 21 21 25 22 44
email: Rainer@krugs.de
Skype: RMkrug
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user