linkGDAL function

Locate and set up 'GDAL' API bindings

Locate and set up 'GDAL - Geospatial Data Abstraction Librar' API bindings

linkGDAL(
  bin_GDAL = NULL,
  searchLocation = NULL,
  ver_select = FALSE,
  quiet = TRUE,
  returnPaths = TRUE
)

Arguments

• bin_GDAL: string contains path to where the gdal binaries are located
• searchLocation: string hard drive letter default is C:/
• ver_select: Boolean default is FALSE. If there is more than one 'GDAL' installation and ver_select = TRUE the user can select interactively the preferred 'GDAL' version
• quiet: Boolean switch for suppressing messages default is TRUE
• returnPaths: Boolean if set to FALSE the paths of the selected version are written to the PATH variable only, otherwise all paths and versions of the installed GRASS versions ae returned.

Returns

add gdal paths to the environment and creates global variables path_GDAL

Details

It looks for the gdalinfo(.exe) file. If the file is found in a bin folder it is assumed to be a valid 'GDAL' binary installation.

if called without any parameter linkGDAL() it performs a full search over the hard drive C:. If it finds one or more 'GDAL' binaries it will take the first hit. You have to set ver_select = TRUE for an interactive selection of the preferred version.

Note

You may also set the path manually. Using a 'OSGeo4W64' https://trac.osgeo.org/osgeo4w/ installation it is typically C:/OSGeo4W64/bin/

Examples

## Not run:

# call if you do not have any idea if and where GDAL is installed
gdal<-linkGDAL()
if (gdal$exist) {
# call it for a default OSGeo4W installation of the GDAL
print(gdal)
}
## End(Not run)

Author(s)

Chris Reudenbach