Create empty Area of Occupancy (AOO) Grid.

createGrid produces empty grid which can be used as the basis to help compute AOO.

Usage

createGrid(input_data, cell_size = 10000)

Arguments

input_data

Spatial object (sf or SpatRaster) of an ecosystem or species distribution. Please use a CRS with units measured in metres.

cell_size

A number specifying the width of the desired grid square (in same units as your coordinate reference system)

Value

A regular grid raster with extent input_data expanded by two cells in each direction and grid size cell_size. Each grid square has a unique raster value that serves as its identification number.

References

Bland, L.M., Keith, D.A., Miller, R.M., Murray, N.J. and Rodriguez, J.P. (eds.) 2016. Guidelines for the application of IUCN Red List of Ecosystems Categories and Criteria, Version 1.0. Gland, Switzerland: IUCN. ix + 94pp. Available at the following web site: https://iucnrle.org/

See also

Other AOO functions: getAOO(), jplot(), makeAOOGrid(), top_pct()

Author

Nicholas Murray murr.nick@gmail.com, Calvin Lee calvinkflee@gmail.com, Aniko B. Toth anikobtoth@gmail.com