createTiles: Divide a raster into tiles.
In phiala/grassR: Functions for use with GRASS GIS

Description Usage Arguments Details Value Author(s) See Also Examples

Divides a GRASS raster into tiles and prepare for subsequent processing.

1	createTiles(baserast, tilesize = 2000)

`baserast`	The name of a GRASS raster to use as the basis for creating a set of tiles.
`tilesize`	The size in pixels of the tiles to create. The default is usually the best option.

A common task is to import a raster into R, do some processing, and either write out a new raster, save some results in R, or both. This series of functions makes it possible to do so for a raster that is too large to fit in available memory in R.

tileindex

A data structure containing information about the created tileset. Should not be modified directly.

Sarah Goslee <sarah.goslee@ars.usda.gov>

processTiles, mergeTiles, removeTiles, testFUN, gparse

## Not run: 
	# how to run
    tileindex <- createTiles("dem30", tilesize=tilesize) 
    tileindex <- processTiles(tileindex, baserast="dem30", FUN=testFUN)
    mergeTiles(tileindex, blocksize=blocksize, outname=outname)
    removeTiles(tileindex)

## End(Not run)