[R-sig-Geo] RSAGA catchment area (flow tracing) with AsterGDEM

[Rainer Hurling]

Am 19.03.2013 12:14 (UTC+1) schrieb N. Anselm:
> dear list,
> 
> I use R for scripting in saga gis. Mostly it works fine, but I dont know
> why the catchment area (flow tracing) does not work with the ASTER
> scene. In saga it works,
> so it should be something in my 'code'. I tried METHOD as well as Method
> (there seems to be inconsistency in saga), I tried CORRECT=FALSE,False,0
> and not,
> none of it worked, possibly it's something completely different.
> 
> Maybe someone of you can give advice?
> thank you very much,
> 
> n. anselm
> 
> 
> workenv<-rsaga.env(workspace=".",path="/usr/bin",modules="/usr/lib/saga")
> 
> rsaga.geoprocessor(lib="ta_hydrology",module=2,env=workenv,param=list(DEM="aster_nosink.sgrd",CAREA="aster_catchmentarea",CSLOPE="aster_catchmentslope",STEP=1,Method=0,MINDQV=0.0,CORRECT=FALSE))

Hmm, it seems that your DEM= should be changed into ELEVATION=

But I may be wrong because I am working with the upcoming version 2.1.0
on FreeBSD with R-devel and RSAGA-0.93-2.

HTH,
Rainer


>> sessionInfo()
> R version 2.14.1 (2011-12-22)
> Platform: i686-pc-linux-gnu (32-bit)
> 
> locale:
>  [1] LC_CTYPE=de_DE.UTF-8          LC_NUMERIC=C
>  [3] LC_TIME=de_DE.UTF-8           LC_COLLATE=de_DE.UTF-8
>  [5] LC_MONETARY=de_DE.UTF-8       LC_MESSAGES=de_DE.UTF-8
>  [7] LC_PAPER=de_DE.UTF-8          LC_NAME=de_DE.UTF-8
>  [9] LC_ADDRESS=de_DE.UTF-8        LC_TELEPHONE=de_DE.UTF-8
> [11] LC_MEASUREMENT=de_DE.UTF-8    LC_IDENTIFICATION=de_DE.UTF-8
> 
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
> 
> other attached packages:
> [1] raster_2.0-41  RSAGA_0.93-2   plyr_1.8       shapefiles_0.7
> foreign_0.8-48
> [6] gstat_1.0-16   sp_1.0-5       rkward_0.5.6
> 
> loaded via a namespace (and not attached):
> [1] grid_2.14.1      intervals_0.13.3 lattice_0.20-0   spacetime_1.0-4
> [5] tools_2.14.1     xts_0.9-3        zoo_1.7-9