Has anyone heard of the hydromad package? http://hydromad.catchment.org/
"*hydromad* is an R package (i.e. a software package for the R statistical computing environment <http://www.r-project.org/>). It provides a modelling framework for environmental hydrology: water balance accounting and flow routing in spatially aggregated catchments. It supports simulation, estimation, assessment and visualisation of flow response to time series of rainfall and other drivers." 2011/9/30 <francesco.piro...@unipd.it> > >From my experience, GRASS also has another module which does a very good > job (at least from my limited experience) at calculating flow accumulation > for each cell: r.watershed. Some time ago I successfully adapted the GRASS > code to my own c++ code; I used GDAL raster library to read a raster DTM > and used the r.watershed code to run the accumulation analysis on the > matrix with height values. > Cheers, > Francesco Pirotti > CIRGEO - University of Padova - Italy > > > I would be very interested in your work of getting flow accumulation > > working in R. I might be able to help (with my limited skills). > > > > Stephen > > > > On Thu 29 Sep 2011 01:50:10 PM CDT, Jonathan Greenberg wrote: > >> Thanks for the responses -- one of the issues with the GRASS > >> implementation of terraflow is that there is not, to my knowledge, > >> parallel support for the code -- the C++ version, I suppose, we can > >> try to compile, although it seems to be fairly out of date. I figured > >> with the quickly increasing capabilities in spatial programming beyond > >> just spatial statistics in R (e.g. via raster, rgdal, maptools), as > >> well as other people developing parallel interfaces for R (e.g. > >> snowfall, Rmpi), R may do well as a scalable system for doing large > >> scale image processing/GIS analyses. Certainly, other programs have > >> not scaled well (ArcMap and GRASS to name a few). > >> > >> topidx looked interesting but I can tell that it won't scale -- it > >> requires the image be in memory as a matrix, so any reasonably large > >> DEM won't work. > >> > >> Sounds like this may require some programming! > >> > >> --j > >> > >> > >> > >> On Thu, Sep 29, 2011 at 6:02 AM, Rich Shepard<rshep...@appl-ecosys.com> > >> wrote: > >>> On Wed, 28 Sep 2011, Jonathan Greenberg wrote: > >>> > >>>> I was wondering if anyone had implemented flow accumulation in R (e.g. > >>>> http://www.cs.duke.edu/geo*/terraflow/)? > >>> > >>> Jon, > >>> > >>> I use r.terraflow (and other hydrological modules) within GRASS > >>> <http://grass.osgeo.org/>. Terrain and hydrologic modeling is best > >>> done, in > >>> my opinion, in GRASS and leave the spatial statistics to R. There is an > >>> interface between the two that allows us users to take advantage of > >>> both. > >>> > >>> Rich > >>> > >>> -- > >>> Richard B. Shepard, Ph.D. | Integrity - Credibility - > >>> Innovation > >>> Applied Ecosystem Services, Inc. | Helping Ensure Our Clients' > >>> Futures > >>> <http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: > >>> 503-667-8863 > >>> > >> > >> > >> > > > > _______________________________________________ > > R-sig-Geo mailing list > > R-sig-Geo@r-project.org > > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > > > > > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
