ring_area

gistools::geometry::tools

Function ring_area 

Source 
pub fn ring_area<P: GetXY>(coords: &[P], radius: f64) -> f64
Expand description

Calculate the approximate area of the polygon were it projected onto the planet. Note that this area will be positive if ring is oriented counter-clockwise, otherwise it will be negative.

Reference: Robert. G. Chamberlain and William H. Duquette, “Some Algorithms for Polygons on a Sphere”, JPL Publication 07-03, Jet Propulsion Laboratory, Pasadena, CA, June 2007 https://trs.jpl.nasa.gov/handle/2014/40409

§Parameters

  • coords: ring Coordinates in lon-lat space
  • planetRadius: the radius of the planet (Earth by default)

§Returns

The approximate signed geodesic area of the polygon in square meters.