### @turf/turf

a JavaScript library for performing geospatial operations with GeoJSON

Updated by @rowanwins

### jsts

A JavaScript library of spatial predicates and functions for processing geometry

Updated by @bjornharrtell

### concaveman

Fast 2D concave hull algorithm in JavaScript (generates an outline of a point set)

Updated by @mapbox-npm-01

### polygon-clipping

Apply boolean Polygon clipping operations (intersection, union, difference, xor) to your Polygons & MultiPolygons.

Updated by @mfogel

### martinez-polygon-clipping

Martinez polygon clipping algorithm, does boolean operation on polygons (multipolygons, polygons with holes etc): intersection, union, difference, xor

Updated by @w8r

### robust-in-sphere

Exact arithmetic test to check if point is contained in sphere

Updated by @mikolalysenko

### 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

Updated by @luandro