processTiles: Process a set of GRASS tiles in R.
In phiala/grassR: Functions for use with GRASS GIS

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

Runs a function FUN for each tile in a GRASS raster and stores the output.

1	processTiles(tileindex, baserast, FUN, ...)

`tileindex`	The tileindex object provided by createTiles()
`baserast`	The name of a GRASS raster file to be used as the basis for tile processing.
`FUN`	The function to process each tile with. This function should return the names of any GRASS rasters created, and R output if any.
`...`	Named arguments to FUN.

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. See gparse for an example wrapping this process within a function.

tileindex

A modified tileindex file.

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

createTiles, 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)