write stars object to gdal dataset (typically: to file)

Usage

write_stars(obj, dsn, layer, ...)

# S3 method for stars
write_stars(
  obj,
  dsn,
  layer = 1,
  ...,
  driver = detect.driver(dsn),
  options = character(0),
  type = if (is.factor(obj[[1]]) && length(levels(obj[[1]])) < 256) "Byte" else "Float32",
  NA_value = NA_real_,
  update = FALSE,
  normalize_path = TRUE,
  scale_offset = c(1, 0)
)

# S3 method for stars_proxy
write_stars(
  obj,
  dsn,
  layer = 1,
  ...,
  driver = detect.driver(dsn),
  options = character(0),
  scale_offset = c(1, 0),
  type = "Float32",
  NA_value = NA_real_,
  chunk_size = c(dim(obj)[1], floor(2.5e+07/dim(obj)[1])),
  progress = TRUE
)

detect.driver(filename)

Arguments

obj: object of class stars
dsn: gdal dataset (file) name
layer: attribute name; if missing, the first attribute is written
...: passed on to gdal_write
driver: driver driver name; see st_drivers
options: character vector with dataset creation options, passed on to GDAL
type: character; output binary type, one of: Byte for eight bit unsigned integer, UInt16 for sixteen bit unsigned integer, Int16 for sixteen bit signed integer, UInt32 for thirty two bit unsigned integer, Int32 for thirty two bit signed integer, Float32 for thirty two bit floating point, Float64 for sixty four bit floating point.
NA_value: non-NA value that should represent R's NA value in the target raster file; if set to NA, it will be ignored.
update: logical; if TRUE, an existing file is being updated
normalize_path: logical; see read_stars
scale_offset: length 2 numeric vector with scale, offset values: raw values computed by raw = (value - offset) / scale are written to dsn; scale and offset values are written to dsn or else a warning is raised
chunk_size: length two integer vector with the number of pixels (x, y) used in the read/write loop; see details.
progress: logical; if TRUE, a progress bar is shown
filename: character; used for guessing driver short name based on file extension; see examples

Details

write_stars first creates the target file, then updates it sequentially by writing blocks of chunk_size.

in case obj is a multi-file stars_proxy object, all files are written as layers into the output file dsn

Examples

detect.driver("L7_ETMs.tif")
#> [1] "GTiff"