st_tile: Specify parameters to load raster in blocks

In stars: Spatiotemporal Arrays, Raster and Vector Data Cubes

Specify parameters to load raster in blocks

Description

Helper function for specifying the block parameters (nXOff, nYOff, nXsize, and nYSize) required by RasterIO argument in read_stars

Usage

st_tile(img_rows, img_cols, x_window, y_window, overlap = 0)

Arguments

img_rows	number of input raster rows (integer)
img_cols	number of input raster columns (integer)
x_window	number of rows in block (integer)
y_window	number of columns in block (integer)
overlap	number of overlapping pixels (integer)

Value

matrix with specified nXOff, nYOff, nXsize, and nYSize parameters for every block

Examples

## Not run: 
tif = system.file("tif/L7_ETMs.tif", package = "stars")
r = read_stars(tif, proxy = TRUE)
tiles = st_tile(nrow(r), ncol(r), 256, 256)
for (i in seq_len(nrow(tiles))) {
  tile = read_stars(tif, proxy = FALSE, RasterIO = tiles[i, ])
  # write tiles to separate files
  write_stars(tile, dsn = paste0(i, ".tif"))
}

## End(Not run)

stars documentation built on May 29, 2024, 8:59 a.m.