The following websites show how to link: R + SAGA + ILWIS + GoogleEarth and some other FOSS.
- http://spatial-analyst.net/wiki/index.php?title=Software provides some basic instructions on how to install and do first steps in software the R + Open Source Desktop GIS (OSGeo) + Google Earth bundle that can be used to run analysis of various spatio-temporal data (specifically written for the MS Windows users). This bundle allows full GIS+statistics integration and can support practically about 80% of processing/visualization capabilities available in commercial packages.
- There is a good tutorial on Geomorphometry in R + SAGA + ILWIS + GRASS provided by: http://geomorphometry.orgYou can see how to connect several Open Source Software for your analysis. More precisely: There is a sample code to process Baranja hill DEM using a combination of R, SAGA, ILWIS and Google Earth (under MS Windows machines). All four packages are available as open source or freeware. You first need to obtain and install R (including the maptools, gstat, rgdal and RSAGA packages), ILWIS, SAGA GIS and GRASS GIS. After you finished installing R, SAGA, ILWIS, GRASS, copy the code and start running it line by line.