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

In rdwplus: Inverse Distance Weighted Percent Land Use for Streams

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, ...)

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.

Value

Nothing.

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)

}

rdwplus documentation built on April 4, 2025, 1:49 a.m.