[R-sig-Geo] Landscape connectivity in R

[Chris Reudenbach]

Hi Manuel,

Probably you know  better than me that there are tons of papers dealing 
with this question out there. Unfortunately up to my mind your question 
focus a more a conceptual  (as described e.g. by Rudnick et al 2012  
Meiklejohn et al. 2012 or Kindlmann & Burel 2008) than a technical 
problem.  You can easily calculate this suggested metrics and measures  
with some R packages e.g. as the suggested ones. But as far as I got it 
you are looking for R-tools that magically ;-) connect these 
metrics/locations. Technically this is done by network analysis on 
graphs or cost analysis  on raster data.  If you want to do derive 
corridors the raster concept seems to be advantageous  because it 
provides zones or something like real areas (corridors).

If you want to to it on a data set that is bigger than about 700*700 
pixels  and you do not want to rely on grainscape you should risk a 
glimpse on fully developed GIS Software packages like GRASS GIS. It 
provides powerful support for all kind of cost analysis . Your corridor 
problem is a a typical least cost path problem that needs a solid 
parametrization of the friction datasets and and landscape patterns as 
derived from the typical metrics. After this you can define your 
corridor analysis. If you are interested in an applied example you may 
have a look at github (https://github.com/gisma/robubu)  where you find  
(among other stuff)  a simple example of an R-driven implemetation of a 
GRASS cost analysis to estimate the movement patterns and connectivity 
corridors of running beetle occurrences in high asia.

cheers Chris



On 13.12.2016 21:00, Jérome Mathieu wrote:
> Hi Manuel,
>
> Perhaps the package "gdistance" can do what you're looking for.
>
> Jerome
>
> 2016-12-13 20:43 GMT+01:00 Manuel Spínola <mspinola10 at gmail.com>:
>
>> Thank you very much Forrest.
>>
>> I am looking for something different related to landscape connectivity
>> (corredor design).  Your suggestion is more for landscape metrics for what
>> I usually use the land.metrics function from the SpatialEco package for
>> that.
>>
>> Best,
>>
>> Manuel
>>
>> 2016-12-13 13:31 GMT-06:00 Forrest Stevens <r-sig-geo at forreststevens.com>:
>>
>>> Check out sdmtools if fragstats like patch/class metrics are what you're
>>> looking for: https://cran.r-project.org/web/packages/SDMTools/index.html
>>>
>>> Sincerely,
>>> Forrest
>>>
>>> On Tue, Dec 13, 2016 at 1:29 PM Manuel Spínola <mspinola10 at gmail.com>
>>> wrote:
>>>
>>>> Dear list members,
>>>>
>>>> Is there any R package, besides grainscape, to assess landscape
>>>> connectivity?
>>>>
>>>> Best,
>>>>
>>>> Manuel
>>>>
>>>> --
>>>> *Manuel Spínola, Ph.D.*
>>>> Instituto Internacional en Conservación y Manejo de Vida Silvestre
>>>> Universidad Nacional
>>>> Apartado 1350-3000
>>>> Heredia
>>>> COSTA RICA
>>>> mspinola at una.cr <mspinola at una.ac.cr>
>>>> mspinola10 at gmail.com
>>>> Teléfono: (506) 8706 - 4662
>>>> Personal website: Lobito de río <https://sites.google.com/
>>>> site/lobitoderio/>
>>>> Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/>
>>>>
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>>
>> --
>> *Manuel Spínola, Ph.D.*
>> Instituto Internacional en Conservación y Manejo de Vida Silvestre
>> Universidad Nacional
>> Apartado 1350-3000
>> Heredia
>> COSTA RICA
>> mspinola at una.cr <mspinola at una.ac.cr>
>> mspinola10 at gmail.com
>> Teléfono: (506) 8706 - 4662
>> Personal website: Lobito de río <https://sites.google.com/
>> site/lobitoderio/>
>> Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/>
>>
>>          [[alternative HTML version deleted]]
>>
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>
>

-- 
Dr Christoph Reudenbach, Philipps-University of Marburg, Faculty of Geography, GIS and Environmental Modeling, Deutschhausstr. 10, D-35032 Marburg, fon: ++49.(0)6421.2824296, fax: ++49.(0)6421.2828950, web: gis-ma.org, giswerk.org, moc.environmentalinformatics-marburg.de