vapour_read_raster_block {vapour}

Read or write raster block

Description

Read a 'block' from raster.

Usage

vapour_read_raster_block(
  dsource,
  offset,
  dimension,
  band = 1L,
  band_output_type = "",
  unscale = TRUE,
  nara = FALSE
)

Arguments

dsource

file name to read from, or write to

offset

position x,y to start writing (0-based, y-top)

dimension

window size to read from, or write to

band

which band to read (1-based)

band_output_type

numeric type of band to apply (else the native type if ”) can be one of 'Byte', 'Int32', or 'Float64'

unscale

default is TRUE so native values will be converted by offset and scale to floating point

nara

if 'TRUE' return in nativeRaster format

Value

a list with a vector of data from the band read

Examples

f <- system.file("extdata", "sst.tif", package = "vapour")
v <- vapour_read_raster_block(f, c(0L, 0L), dimension = c(2L, 3L), band = 1L)