rgrass7 (version 0.1-3)

rgrass7-package: Interface between GRASS geographical information system and R

Description

Interpreted interface between GRASS geographical information system, version 7, and R, based on starting R from within the GRASS environment, or on running R stand-alone and creating a throw-away GRASS environment from within R. The interface uses classes defined in the sp package to hold spatial data.

Details

Index: readRAST read GRASS raster files writeRAST write GRASS raster files readVECT read GRASS vector object files writeVECT write GRASS vector object files gmeta read GRASS metadata from the current LOCATION getLocationProj return a PROJ.4 string of projection information gmeta2grd create a GridTopology object from the GRASS region vInfo return vector geometry information vColumns return vector database columns information vDataCount return count of vector database rows vect2neigh return area neighbours with shared boundary length Note that the examples now use the smaller subset North Carolina location: http://grass.osgeo.org/sampledata/north_carolina/nc_basic_spm_grass7.tar.gz

Examples

if (nchar(Sys.getenv("GISRC")) > 0 &&
  read.dcf(Sys.getenv("GISRC"))[1,"LOCATION_NAME"] == "nc_basic_spm_grass7") {
  require(rgdal)
  elevation <- readRAST("elevation", ignore.stderr=TRUE, plugin=FALSE)
  summary(elevation)
  grd <- gmeta2grd(ignore.stderr=TRUE)
  grd
  set.seed(1)
  pts <- spsample(elevation, 200, "random")
  smple <- SpatialPointsDataFrame(pts, data=over(pts, elevation))
  summary(smple)
  writeVECT(smple, "sp_dem", v.in.ogr_flags="overwrite", ignore.stderr=TRUE)
  bugsDF <- readVECT("schools", ignore.stderr=TRUE, mapset="PERMANENT")
  summary(bugsDF)
  vInfo("streams", ignore.stderr=TRUE)
  vColumns("streams", ignore.stderr=TRUE)
  vDataCount("streams", ignore.stderr=TRUE)
  streams <- readVECT("streams", type="line",
    remove.duplicates=FALSE, ignore.stderr=TRUE, plugin=FALSE)
  summary(streams)
}