GDAL RasterIO parameter creator

Source: R/grids.R

Basic function to create the window paramers as used by GDAL RasterIO.

raster_io0(
  src_offset,
  src_dim,
  out_dim = src_dim,
  resample = "NearestNeighbour"
)

Arguments

src_offset

index offset (0-based, top left)
src_dim

source dimension (XY)
out_dim

output dimension (XY, optional src_dim will be used if not set)
resample

resampling algorith for GDAL see details

Value

numeric vector of values specifying offset, source dimension, output dimension

Details

Resampling algorithm is one of 'NearestNeighbour' (default), 'Average', 'Bilinear', 'Cubic', 'CubicSpline', 'Gauss', 'Lanczos', 'Mode', but more may be available given the version of GDAL in use.

Examples

raster_io0(c(0L, 0L), src_dim = c(24L, 10L))

#>  offset_x  offset_y source_nx source_ny    out_nx    out_ny 
#>         0         0        24        10        24        10 
#> attr(,"resample")
#> [1] "NearestNeighbour"