grout: Create a tiling scheme from a raster

In hypertidy/grout: Create Raster Tiles

Create a tiling scheme from a raster

Description

The input may be an actual raster or a matrix. There is an assumed block size of 256x256, and the scheme will record the number of tiles in each dimension and the amount of "overlapping dangle" when the dimensions of the data don't fit neatly within the tiles.

Usage

grout(dimension, extent = NULL, blocksize = NULL, projection = NA_character_)

Arguments

dimension	number of columns and rows of the raster grid
extent	extent of the raster grid xmin,xmax,ymin,ymax
blocksize	tile dimensions in columns (X) and rows (Y)
projection	the projection (crs) of the grid

Details

If extent is not provided the default 'xmin=0,xmax=ncol,ymin=0,ymax=nrow' is used.

The tile scheme object has print and plot methods for basic information.

See example in the README with 'wk::rct' to generate plot-able and efficient spatial objects from the scheme.

Value

A "tile scheme" object with information about the tile spacing and extent.

Examples

## one block tile (too big)
grout(c(87, 61), blocksize = c(256L, 256L))
## more size appropriate
grout(c(87, 61), blocksize = c(8, 8))
grout(c(10, 20), c(0, 1, 0, 2), blocksize = c(256, 256))

hypertidy/grout documentation built on April 29, 2024, 9:25 a.m.