getArea: Calculates the Area of a Raster.

In nick-murray/redlistr: Tools for the IUCN Red List of Ecosystems and Species

Calculates the Area of a Raster.

Description

getArea reports the area of a RasterLayer object using the pixel counting method, or terra::expanse for SpatRaster and SpatVector objects, or the area of a SpatialPolygons or sf object using sf::st_area

Usage

getArea(x, ...)

Arguments

x	Either a RasterLayer or SpatialPolygons object. For a RasterLayer, no data value should be NA
...	Addition arguments based on input format

Value

The total area of the cells of interest in km2

Author(s)

Nicholas Murray [e-mail], Calvin Lee [e-mail]

See Also

Other Change functions: getArea.RasterLayer(), getArea.SpatRaster(), getArea.SpatVect(), getArea.SpatialPolygons(), getArea.sf(), getAreaLoss(), getDeclineStats()

Examples

crs.UTM55S <- '+proj=utm +zone=55 +south +ellps=WGS84 +datum=WGS84 +units=m +no_defs'
r1 <- raster(ifelse((volcano<130), NA, 1), crs = crs.UTM55S)
extent(r1) <- extent(0, 6100, 0, 8700)
a.r1 <- getArea(r1) # area of all non-NA cells in r1

nick-murray/redlistr documentation built on Oct. 12, 2023, 5:45 p.m.