GridMaker: Builds a grid from a vector layer

Usage

GridMaker(
  layer = NULL,
  res = 100000L,
  epsg = 3035,
  tol = 0L,
  gt = c("SURF", "CPT"),
  tilesize = NULL,
  progress = FALSE,
  parallel = FALSE,
  ...
)

Arguments

layer: a simple feature (sf) containing the geometry of the region to be covered by the grid. if NULL the full extend of GridMaker under EPSG = 3035
res: 100 000 The grid resolution (pixel size). The unit of measure is expected to be the same as the one of the CRS. Minimun value allowed 1
epsg: 3035 (corresponding to ETRS89-LAEA) The EPSG numerical code of the grid CRS. Only proyected layers are allowed
tol: 0 (buffer on layer) A tolerance distance to keep the cells that are not too far from the layer. This uses sf::st_buffer() before building the grid with default values. Negative tol is possible
gt: SURF The type of grid cell geometry: Squared surface representation ('SURF') or its centroid ('CPT').
tilesize: tile size if the computation has to be done using tiles (strongly recomended for big grids). tilesize is an scale factor so the eventual tile size = res*tilesize
progress: FALSE/TRUE show progress in case of tiling.
parallel: FALSE/TRUE in case of tiling, if the proccess should be run in parallel. Requires "future::plan(multisession, workers = ##)" outside the function.
...: Other parameters passed onto buffer if tol > 0.

Value

A sf grid layer object.

Examples

if (FALSE) { # \dontrun{

library(sf)
GridMaker()
nc <- sf::st_read(system.file("shape/nc.shp", package = "sf"))
GridMaker(nc, epsg = 32119)
GridMaker(nc, res = 1000L, epsg = 32119)

} # }