raster_by_poly {bcmaps}

Overlay a SpatialPolygonsDataFrame or sf polygons layer on a raster layer and clip the raster to each polygon. Optionally done in parallel

Description

Overlay a SpatialPolygonsDataFrame or sf polygons layer on a raster layer and clip the raster to each polygon. Optionally done in parallel

Usage

raster_by_poly(
  raster_layer,
  poly,
  poly_field,
  summarize = FALSE,
  parallel = FALSE
)

Arguments

raster_layer

the raster layer

poly

a SpatialPolygonsDataFrame layer or sf layer

poly_field

the field on which to split the SpatialPolygonsDataFrame

summarize

Should the function summarise the raster values in each polygon to a vector? Default FALSE

parallel

process in parallel? Default FALSE. If TRUE, it is up to the user to call future::plan() (or set options) to specify what parallel strategy to use.

Value

a list of RasterLayers if summarize = FALSE otherwise a list of vectors.