| getArea {redlistr} | R Documentation |
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 murr.nick@gmail.com, Calvin Lee calvinkflee@gmail.com
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
[Package redlistr version 1.0.4 Index]