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evoland utility functions to work with terra objects

Source: R/util_terra.R
util_terra.Rd

Useful to coax terra raster and vector data into evoland tabular form.

Usage

extract_using_coords_t(x, coords, na_omit = TRUE)

tabular_to_raster(data, coords, value_col = "id_lulc", resolution = NULL)

Arguments

x

The object to extract from; use "simple" extraction for rasters, i.e. no resampling is done.

coords

A coords_t object with coordinate information. Must have epsg and optionally resolution attributes.

na_omit

Logical, whether to omit rows with NA values in the output

data

A data.table with column id_coord and value_col

resolution

Numeric, raster resolution in CRS units. If NULL, use "resolution" attribute on coords, or estimate from coord spacing.

Value

terra::SpatRaster with LULC values. If multiple periods present in data, returns a multi-layer raster with one layer per period.

Functions

  • extract_using_coords_t(): Extract values from a SpatRaster or SpatVector object using a (minimal) coords_t object. Returns a long data.table with id_coord, layer/attribute, and value.

  • tabular_to_raster(): Converts a table with id_coord information to a SpatRaster. Useful for spatial analysis and validation that requires raster format.