extract_values: Extract buffer values

In tabrasel/WetlandTools: General utility functions for TerrainWorks

Extract buffer values

Description

Extracts values for all layers of a raster for a set of points or polygons. If

Usage

extract_values(
  raster,
  points,
  extraction_method = "all",
  extraction_layer = NULL,
  return_type = "table",
  na.rm = TRUE,
  ...
)

Arguments

raster	A SpatRaster of explanatory variables with a layer for each variable to extract.
points	SpatVector of points to use for extraction. If polygons, the point chosen for extraction will be determined via the extraction_method parameter.
extraction_method	Method to use for extracting values from each point: "all", "centroid", "max", or "min". Ignored if extractionPoints is not polygon
extraction_layer	Layer to use for extracting value. Ignored if extraction_method = "centroid". Ignored if extraction_method is "all" or "centroid" or if extractionPoints is not polygon.
return_type	"table" or "points". If "table" (default) a data.table with values is returned. if "points", a SpatVector of points is returned, with training values as attributes for each point.
na.rm	Remove any cells with NA values?
...	Additional arguments passed onto terra::extrac

Value

A dataframe of extracted raster values with an additional "class" column.

tabrasel/WetlandTools documentation built on Dec. 20, 2024, 8:50 a.m.