paramGRASSw function

Usually for internally usage get 'GRASS GIS' and rgrass parameters on 'Windows' OS

Initialize the enviroment variables on a 'Windows' OS for using 'GRASS GIS' via rgrass

paramGRASSw(
  set_default_GRASS = NULL,
  DL = "C:/",
  ver_select = FALSE,
  quiet = TRUE
)

Arguments

• set_default_GRASS: default = NULL forces a full search for 'GRASS GIS' binaries. You may alternatively provide a vector containing paths and keywords. c('C:/OSGeo4W64','grass-7.0.5','osgeo4w') is valid for a typical osgeo4w installation.
• DL: character search location default = C:
• ver_select: boolean default is FALSE. If there is more than one 'SAGA GIS' installation and ver_select = TRUE the user can select interactively the preferred 'SAGA GIS' version
• quiet: boolean switch for supressing console messages default is TRUE

Details

The concept is very straightforward but for an all days usage pretty helpful. You need to provide a terra or a sf object. The derived properties are used to initialize a temporary but static rgrass environment. During the rsession you will have full access to GRASS both via the wrapper package as well as the command line. paramGRASSw initializes the usage of GRASS.

Examples

run = FALSE
if (run) {
# automatic retrieval of valid 'GRASS GIS' environment settings 
# if more than one is found the user has to choose.
paramGRASSw()

# typical OSGeo4W64 installation
paramGRASSw(c('C:/OSGeo4','grass7.8','osgeo4W'))
}