So I have some points which represent the estimated locations of Wifi networks
in my neighborhood. Thus far I have been able to make some fun maps which
estimate the "density" of signal based on a couple simple assumptions.
(http://169.237.35.250/~dylan/temp/sycamore-wifi-range-ogr_python.jpg)
However, this method assumes a constant, circular coverage area. I would like
to model propagation of the wifi signal (assuming no interference from trees,
etc) using a simple equation realting relative signal strength as a function
of distance from the signal source.
I have taken a quick peek at the source for r.buffer, and am wondering how
difficult it would be to modify it such that the module would optionally
write cells based on the distance from the starting point, defined by some
function.
anyone familiar with r.buffer?
Cheers,
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341
there was a discussion about similar topic some time a go
[GRASS-user] [GRASSLIST:1081] Sediment dispersal modeling
It would be nice if there could be some module that could simulate flow using
user's defined equation. No, I don't have time right now to code it.
Maris.
On Wednesday 06 September 2006 22:07, Dylan Beaudette wrote:
Greetings,
So I have some points which represent the estimated locations of Wifi
networks in my neighborhood. Thus far I have been able to make some fun
maps which estimate the "density" of signal based on a couple simple
assumptions.
(http://169.237.35.250/~dylan/temp/sycamore-wifi-range-ogr_python.jpg)
However, this method assumes a constant, circular coverage area. I would
like to model propagation of the wifi signal (assuming no interference from
trees, etc) using a simple equation realting relative signal strength as a
function of distance from the signal source.
I have taken a quick peek at the source for r.buffer, and am wondering how
difficult it would be to modify it such that the module would optionally
write cells based on the distance from the starting point, defined by some
function.
Answering my own question, looks like a combination of r.cost and r.mapcalc
did the trick...
details at 11 !
Dylan
On Wednesday 06 September 2006 13:00, Māris Nartišs wrote:
Hi,
there was a discussion about similar topic some time a go
[GRASS-user] [GRASSLIST:1081] Sediment dispersal modeling
It would be nice if there could be some module that could simulate flow
using user's defined equation. No, I don't have time right now to code it.
Maris.
On Wednesday 06 September 2006 22:07, Dylan Beaudette wrote:
> Greetings,
>
> So I have some points which represent the estimated locations of Wifi
> networks in my neighborhood. Thus far I have been able to make some fun
> maps which estimate the "density" of signal based on a couple simple
> assumptions.
> (http://169.237.35.250/~dylan/temp/sycamore-wifi-range-ogr_python.jpg)
>
> However, this method assumes a constant, circular coverage area. I would
> like to model propagation of the wifi signal (assuming no interference
> from trees, etc) using a simple equation realting relative signal
> strength as a function of distance from the signal source.
>
> I have taken a quick peek at the source for r.buffer, and am wondering
> how difficult it would be to modify it such that the module would
> optionally write cells based on the distance from the starting point,
> defined by some function.
>
> anyone familiar with r.buffer?
>
> Cheers,
On Wednesday 06 September 2006 14:53, Dylan Beaudette wrote:
Answering my own question, looks like a combination of r.cost and r.mapcalc
did the trick...
details at 11 !
Dylan
On Wednesday 06 September 2006 13:00, Māris Nartišs wrote:
> Hi,
>
> there was a discussion about similar topic some time a go
> [GRASS-user] [GRASSLIST:1081] Sediment dispersal modeling
>
> It would be nice if there could be some module that could simulate flow
> using user's defined equation. No, I don't have time right now to code
> it.
>
> Maris.
>
> On Wednesday 06 September 2006 22:07, Dylan Beaudette wrote:
> > Greetings,
> >
> > So I have some points which represent the estimated locations of Wifi
> > networks in my neighborhood. Thus far I have been able to make some fun
> > maps which estimate the "density" of signal based on a couple simple
> > assumptions.
> > (http://169.237.35.250/~dylan/temp/sycamore-wifi-range-ogr_python.jpg)
> >
> > However, this method assumes a constant, circular coverage area. I
> > would like to model propagation of the wifi signal (assuming no
> > interference from trees, etc) using a simple equation realting relative
> > signal strength as a function of distance from the signal source.
> >
> > I have taken a quick peek at the source for r.buffer, and am wondering
> > how difficult it would be to modify it such that the module would
> > optionally write cells based on the distance from the starting point,
> > defined by some function.
> >
> > anyone familiar with r.buffer?
> >
> > Cheers,
>
> _______________________________________________
> grassuser mailing list
> grassuser@grass.itc.it
> http://grass.itc.it/mailman/listinfo/grassuser
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341
