secr (version 4.5.3)

polyarea: Area of Polygon(s)

Description

Area of a single closed polygon (simple x-y coordinate input) or of multiple polygons, possibly with holes.

Usage

polyarea(xy, ha = TRUE)

Arguments

xy

dataframe or list with components `x' and `y', or a SpatialPolygons or SpatialPolygonsDataFrame object from package sp, or an sf object with polygon data

ha

logical if TRUE output is converted from square metres to hectares

Value

A scalar.

Details

For sf, sfc, SpatialPolygons or SpatialPolygonsDataFrame objects, the package sf is used.

See Also

buffer.contour

Examples

# NOT RUN {
polyarea(make.grid(hollow = TRUE))
# }