point-in-polygon-hao

A point in polygon based on the paper Optimal Reliable Point-in-Polygon Test and Differential Coding Boolean Operations on Polygons

geo-toolkits

A comprehensive TypeScript library for geospatial operations including geofencing, polygon containment, area calculations, and coordinate processing. Supports GeoJSON, KML, and KMZ file formats with both local file and remote URL loading capabilities.

wherewolf

A client-side boundary service powered by GeoJSON or TopoJSON data. Find which feature a point lies in.