calculate the physical area of a geojson geometry
npm install @mapbox/geojson-area
Calculate the area inside of any GeoJSON geometry.
npm install @mapbox/geojson-area
``js
var geojsonArea = require('@mapbox/geojson-area');
var area = geojsonArea.geometry(obj);
`
Given a Geometry object, return contained
area as square meters. Invalid input will return null`.
Adapted from OpenLayers