spherical-geometry-js
This library provides classes and functions for the computation of geometric data on the surface of the Earth. Code ported from the Google Maps Javascript API v3
@thi.ng/geom
Functional, polymorphic API for 2D geometry types & SVG generation
node-geometry-library
Javascript Geometry Library provides utility functions for the computation of geometric data on the surface of the Earth. Code ported from Google Maps Android API.