isabella232 / leaflet-geodesy

a leaflet plugin for the earth

leaflet-geodesy

A Leaflet plugin for the earth.

install

With browserify

npm install --save leaflet-geodesy

Via the Mapbox.js Plugin CDN: https://www.mapbox.com/mapbox.js/plugins/#leaflet-geodesy

Otherwise

https://raw.github.com/mapbox/leaflet-geodesy/gh-pages/leaflet-geodesy.js

api

Either via require('leaflet-geodesy') or the LGeo object when used without browserify.

geodesy.circle(center, radius, opt)

Given center as L.latLng or [lat, lon] and radius in meters, and opt being all path options plus parts for sections to draw, create a L.polygon layer of a real-earth circle.

The generated layer supports:

• setLatLng(center): set a new centerpoint
• setRadius(radius): adjust radius
• getRadius(): get radius
• toGeoJSON(): get GeoJSON representation

geodesy.area(layer)

Given a L.Polygon layer, return the physical area contained within.

---

• spherical does the work behind the scenes
• everything is wgs84-based