onpoint (version 1.0.6)

calc_area: calc_area

Description

Calculate area of polygon

Usage

calc_area(x)

Value

numeric

Arguments

x

matrix with x,y coordinates.

Details

Calculate area of polygon in input units. If the polygon is not closed, the first coordinate is used as last coordinate to close it.

Examples

if (FALSE) {
dat <- matrix(data = c(0, 0, 0, 10, 10, 10, 10, 0), ncol = 2, byrow = TRUE)
calc_area(x = dat)
}