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Convert vector data into a raster using GDAL

Source: R/terra_gdal_rasterize.R
terra_gdal_rasterize.Rd

This function is a wrapper for gdalUtilities::gdal_rasterize() for use with terra objects.

Usage

terra_gdal_rasterize(
  x,
  sf,
  burn = 1,
  init = 0,
  invert = FALSE,
  update = FALSE,
  touches = FALSE,
  n_threads = 1,
  filename = tempfile(fileext = ".tif"),
  sf_filename = tempfile(fileext = ".gpkg"),
  datatype = "FLT4S",
  cache_limit = 200,
  tiled = FALSE,
  bigtiff = FALSE,
  nbits = NULL,
  compress = "LZW",
  NAflag = NULL,
  output_raster = TRUE
)

Arguments

x

terra::rast() Raster object with source data.

sf

sf::st_sf() Spatial object to rasterize.

burn

numeric Value for encoding the vector data. Defaults to 1.

init

numeric Value for encoding background cells that do not overlap with the vector data. Defaults to 0.

invert

logical Should the burn process be inverted? Defaults to FALSE.

update

logical Should the result by producing by updating the argument to x? If FALSE then the argument to x is only used to specify the spatial properties of the resulting raster (i.e., values have on the result), Defaults to FALSE.

touches

logical Should cells of x that are overlap with any part of sf be treated as covered by sf? Defaults to FALSE, such that only cells that have their centroid covered by sf are treated as covered.

n_threads

integer Number of computational threads to use for data processing. To reduce run time, it is strongly recommended to set this parameter based on available resources (see Examples section below). Defaults to 1.

filename

character Filename for output raster. Defaults to tempfile(fileext = ".tif").

sf_filename

character File name to temporarily save argument to sf. Defaults to a temporary (geopackage) file.

datatype

character Value indicating the data type for saving data. Defaults to "FLT4S".

cache_limit

integer Number of MB to use for GDAL caching. Defaults to 200.

tiled

logical Value indicating if GeoTIFF files should be tiled. Defaults to FALSE.

bigtiff

logical Value indicating the data should be stored in BIGTIFF format. Defaults to FALSE.

nbits

integer Number of bits for output data. Defaults to NULL such that the number of bits is automatically determined.

compress

character Value indicating compression format. Available options include "LZW" and "DEFLATE". Defaults to "LZW".

NAflag

numeric Value for representing missing (NA) values. A "none" value can also be used to indicate that no flag should be set. Defaults to NULL such that the value is determined automatically.

output_raster

logical Should a raster (terra::rast()) object be returned? If FALSE then the file path for the resulting file is returned. Defaults to TRUE.

Value

A terra::rast() raster object.

Examples

# please ensure that the gdalUtilities package is installed
# to run this example
# import vector data
f <- system.file("ex/lux.shp", package = "terra")
sf <- read_sf(f)

# create template raster
x <- rast(vect(sf), ncols = 75, nrows = 100)
x <- terra::setValues(x, runif(terra::ncell(x)))

# rasterize vector data
z <- terra_gdal_rasterize(x, sf, burn = 5)

# plot result
plot(z)