functions to interact with gdal not meant to be called directly by users (but e.g. by stars::read_stars)
gdal_read( x, ..., options = character(0), driver = character(0), read_data = TRUE, NA_value = NA_real_, RasterIO_parameters = list() ) gdal_write( x, ..., file, driver = "GTiff", options = character(0), type = "Float32", NA_value = NA_real_, geotransform, update = FALSE, scale_offset = c(1, 0) ) gdal_inv_geotransform(gt) gdal_crs(file, options = character(0)) gdal_metadata( file, domain_item = character(0), options = character(0), parse = TRUE ) gdal_subdatasets(file, options = character(0), name = TRUE) gdal_polygonize( x, mask = NULL, file = tempfile(), driver = "GTiff", use_integer = TRUE, geotransform, breaks = classInt::classIntervals(na.omit(as.vector(x[])))$brks, use_contours = FALSE, contour_lines = FALSE, connect8 = FALSE, ... ) gdal_rasterize(sf, x, gt, file, driver = "GTiff", options = character()) gdal_extract(f, pts, bilinear = FALSE) gdal_read_mdim( file, array_name = character(0), options = character(0), offset = integer(0), count = integer(0), step = integer(0), proxy = FALSE, debug = FALSE ) gdal_write_mdim( file, driver, dimx, cdl, wkt, xy, ..., root_group_options = character(0), options = character(0), as_float = TRUE ) gdal_create(f, nxy, values, crs, xlim, ylim)
character vector, possibly of length larger than 1 when more than one raster is read
character; driver specific options regarding reading or creating the dataset
character; driver short name; when empty vector, driver is auto-detected.
FALSE, only the imagery metadata is returned
(double) non-NA value to use for missing values; if
NA, when writing missing values are not specially flagged in output dataset, when reading the default (dataset) missing values are used (if present / set).
list with named parameters to GDAL's RasterIO; see the stars::read_stars documentation.
gdal write type
length 6 numeric vector with GDAL geotransform parameters.
TRUE if in an existing raster file pixel values shall be updated.
length 2 numeric; contains scale and offset values
double vector of length 6
character vector of length 0, 1 (with domain), or 2 (with domain and item); use
"" for the default domain, use
NA_character_ to query the domain names.
logical; should metadata be parsed into a named list (
TRUE) or returned as character data?
logical; retrieve name of subdataset? If
FALSE, retrieve description
stars object with NA mask (0 where NA), or NULL
TRUE, raster values are read as (and rounded to) unsigned 32-bit integers values; if
FALSE they are read as 32-bit floating points numbers. The former is supposedly faster.
numeric vector with break values for contour polygons (or lines)
TRUE use 8 connection algorithm, rather than 4
object of class
character; file name
logical; use bilinear interpolation, rather than nearest neighbor?
number of pixels to read
step size (pixels)
logical; return proxy object?
logical; print debug messages?
integer named vector with dimensions of object
list with variables, each having a named dim attribute
character; WKT of crs
character; names of the spatial x and y dimension
character; driver specific options regarding the creation of the root group
TRUE write 4-byte floating point numbers, when
FALSE write 8-byte doubles.
integer vector of length 2
object of class
object of class
crs, see st_crs.
named list with metadata items
gdal_subdatasets returns a zero-length list if
file does not have subdatasets, and else a named list with subdatasets.
These functions are exported for the single purpose of being used by package stars, they are not meant to be used directly and may change or disappear without prior notice or deprecation warnings.
gdal_inv_geotransform returns the inverse geotransform
gdal_crs reads coordinate reference system from GDAL data set
get_metadata gets metadata of a raster layer
gdal_subdatasets returns the subdatasets of a gdal dataset