rdwplus (version 1.0.1)

retrieve_vector: Write a vector layer from the current GRASS mapset to file

Description

This function writes a GRASS mapset vector layer (like a shapefile) to file.

Usage

retrieve_vector(layer, out_layer, overwrite = FALSE, ...)

Value

Nothing.

Arguments

layer

The name of the vector layer in the GRASS mapset that is to be written out.

out_layer

The name of the shapefile to be created (with .shp file extension).

overwrite

A logical indicating whether the output from this function should be allowed to overwrite any existing files. Defaults to FALSE.

...

Additional arguments to v.out.ogr.

Examples

# Will only run if GRASS is running
if(check_running()){

# Load data set
dem <- system.file("extdata", "dem.tif", package = "rdwplus")
stream_shp <- system.file("extdata", "streams.shp", package = "rdwplus")

# Set environment parameters and import data to GRASS
set_envir(dem)
vector_to_mapset(vectors = stream_shp)

# Retrieve raster 
out_name <- paste0(tempdir(), "/", "retrieved_streams.shp")
retrieve_vector("streams", out_layer = out_name, overwrite = TRUE)

}