clRasterize: Rasterize Polygons in Parallels

In ssaxe-usgs/METsteps: Aggregate Data to the HUC 2-10 Levels (one line, title case)

Description

Function to chunk features in shapefile, rasterize in parallels, and assign values. Can be performed not in parallels, but is significantly slower and the user can just as easily use the raster::rasterize() function.

Usage

clRasterize(shp, mask.raster, shpValues, cl = NULL, layer = NULL,
  verbose = TRUE, plotMerged = TRUE)

Arguments

shp	Shapefile to rasterize; Shapefile or path to shapefile.
mask.raster	Raster object; NA-filled raster object or path to raster (NA's will be inserted).
shpValues	The values to be transferred to raster. Must be single number or vector of numbers the length of the number of spatial features. If vector of numbers, will be assigned in the same order as the order of features in shapefile.
cl	Cluster object created through parallel::makeCluster(n). Defaults to NULL, in which case function will not be run in parallels and will operate more slowly.
layer	Layer argument if required for importing shapefile through rgdal::readOGR(). Defaults to NULL. Only required if shp is path to file.
verbose	Show progress? Defaults to TRUE.
plotMerged	Plot resulting raster? Defaults to TRUE, but will change to FALSE if verbose==FALSE.

Value

features.

Examples

clRasterize()

ssaxe-usgs/METsteps documentation built on May 5, 2019, 5:54 p.m.