gdal_utils: Native interface to gdal utils

Description Usage Arguments Value Examples

View source: R/gdal_utils.R

Description

Native interface to gdal utils

Usage

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gdal_utils(
  util = "info",
  source,
  destination,
  options = character(0),
  quiet = !(util %in% c("info", "mdiminfo")),
  processing = character(0),
  colorfilename = character(0)
)

Arguments

util

character; one of info, warp, rasterize, translate, vectortranslate (for ogr2ogr), buildvrt, demprocessing, nearblack, grid, mdiminfo and mdimtranslate (the last two requiring GDAL 3.1)

source

character; name of input layer(s); for warp, buidvrt or mdimtranslate this can be more than one

destination

character; name of output layer

options

character; options for the utility

quiet

logical; if TRUE, suppress printing the output for info and mdiminfo, and suppress printing progress

processing

character; processing options for demprocessing

colorfilename

character; name of color file for demprocessing (mandatory if processing="color-relief")

Value

info returns a character vector with the raster metadata; all other utils return (invisibly) a logical indicating success (i.e., TRUE); in case of failure, an error is raised.

Examples

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if (sf_extSoftVersion()["GDAL"] > "2.1.0") {
# info utils can be used to list information about about a raster
# dataset. More info: https://gdal.org/programs/gdalinfo.html
in_file <- system.file("tif/geomatrix.tif", package = "sf")
gdal_utils("info", in_file, options = c("-mm", "-proj4"))

# vectortranslate utils can be used to convert simple features data between
# file formats. More info: https://gdal.org/programs/ogr2ogr.html
in_file <- system.file("shape/storms_xyz.shp", package="sf")
out_file <- paste0(tempfile(), ".gpkg")
gdal_utils(
  util = "vectortranslate",
  source = in_file,
  destination = out_file, # output format must be specified for GDAL < 2.3
  options = c("-f", "GPKG")
)
# The parameters can be specified as c("name") or c("name", "value"). The
# vectortranslate utils can perform also various operations during the
# conversion process. For example we can reproject the features during the
# translation.
gdal_utils(
  util = "vectortranslate",
  source = in_file,
  destination = out_file,
  options = c(
  "-f", "GPKG", # output file format for GDAL < 2.3
  "-s_srs", "EPSG:4326", # input file SRS
  "-t_srs", "EPSG:2264", # output file SRS
  "-overwrite"
  )
)
st_read(out_file)
# The parameter s_srs had to be specified because, in this case, the in_file
# has no associated SRS.
st_read(in_file)
}

sf documentation built on June 10, 2021, 1:06 a.m.