rgrass7 (version 0.1-3)

gmeta: Reads GRASS metadata from the current LOCATION

Description

GRASS LOCATION metadata are read into a list in R; helper function getLocationProj returns an spproj-compliant PROJ.4 string of projection information. The helper function gmeta2grd creates a GridTopology object from the current GRASS mapset region definitions.

Usage

gmeta(ignore.stderr = FALSE)
getLocationProj(ignore.stderr = FALSE)
gmeta2grd(ignore.stderr = FALSE)
## S3 method for class 'gmeta':
print(x, ...)
get.ignore.stderrOption()
get.stop_on_no_flags_parasOption()
get.useGDALOption()
get.pluginOption()
get.echoCmdOption()
get.useInternOption()
get.legacyExecOption()
get.defaultFlagsOption()
get.suppressEchoCmdInFuncOption()
set.ignore.stderrOption(value)
set.stop_on_no_flags_parasOption(value)
set.useGDALOption(value)
set.pluginOption(value)
set.echoCmdOption(value)
set.useInternOption(value)
set.legacyExecOption(value)
set.defaultFlagsOption(value)
set.suppressEchoCmdInFuncOption(value)

Arguments

ignore.stderr

default FALSE, can be set to TRUE to silence system() output to standard error; does not apply on Windows platforms

x

S3 object returned by gmeta

...

arguments passed through print method

value

logical value for setting options on ignore.stderr set by default on package load to FALSE, stop_on_no_flags_paras set by default on package load to TRUE, useGDAL set by default on package load to TRUE, plugin<

Value

• Returns list of g.gisenv, g.region -g3, and g.proj values

Examples

if (nchar(Sys.getenv("GISRC")) > 0 &&
  read.dcf(Sys.getenv("GISRC"))[1,"LOCATION_NAME"] == "nc_basic_spm_grass7") {
  G <- gmeta()
  print(G)
  CRS(getLocationProj())
  grd <- gmeta2grd()
  print(grd)
  ncells <- prod(slot(grd, "cells.dim"))
  df <- data.frame(k=rep(1, ncells))
  mask_SG <- SpatialGridDataFrame(grd, data=df)
  print(summary(mask_SG))
}