[R-sig-Geo] Hydrological distance between sites

[Facundo Muñoz]

Sorry Clèment, please use the attached fixed version instead.
I thaught I had the latest version on the web.

Bests,
   facu.-


Clément Tisseuil escribió:
> Thank you very much Facu,
>
> It is exactly what I was looking for!
>
>
> Le 11 novembre 2009 17:13, Facundo Muñoz <famuvie at alumni.uv.es> a écrit :
>
> That is more like a geographical operation.
>   
>> I wrote a little GRASS script suited to do this.
>> http://www.geeitema.org/doc/guenmap//docs/v.costdist.mat.zip
>>
>> You have to provide a "cost" surface with zeroes over land regions, and
>> with a constant value over water equal to the raster resolution you are
>> working with.
>> You then can provide a vector map of "source" sites and one or more maps
>> with "end" sites, and the script computes all hydrological distances from
>> all the source sites to all the end sites and store the values in the data
>> tables.
>> Of course you can use the same map for 'source' and 'end'. In this case you
>> get all the distances between the sites.
>>
>> Hope it helps.
>> Æ'acu.-
>>
>> Clément Tisseuil escribió:
>>
>>     
>>> Dear r-sig-geo list members,
>>>
>>> Does anyone know if some R functions exist to calculate some hydrological
>>> distances between sites? By hydrological distances, I mean for example the
>>> 'real' distance that separates two sites throughout the river network
>>> connexions.
>>>
>>> Thanks in advance
>>>
>>> Clem
>>>
>>>        [[alternative HTML version deleted]]
>>>
>>> _______________________________________________
>>> R-sig-Geo mailing list
>>> R-sig-Geo at stat.math.ethz.ch
>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>
>>>
>>>
>>>       
>
> 	[[alternative HTML version deleted]]
>
>   
> ------------------------------------------------------------------------
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo at stat.math.ethz.ch
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>   
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20091111/794cb369/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: v.costdist.mat.zip
Type: application/zip
Size: 3800 bytes
Desc: not available
URL: <https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20091111/794cb369/attachment.zip>