Polygon Packages

turf point-on-surface module

Receives a Coordinate, a Radius and a Number of edges and aproximates a circle by creating a polygon that fills its area

OSM tags indicate if a closed way should be treated as a polygon or linestring

Javascript library for 2d geometry

Drag functionality for Leaflet vector layers

Coordinate, linear, and area measure tool for Leaflet maps

Apply Ramer-Douglas-Peucker line simplification to GeoJSON features or feature collections in JS or on the CLI

Index for matching points against a set of GeoJSON polygons

Convex decomposition for 2D polygons

Fast point-in-polygon intersection for large numbers of polygons.

Polygon tesselation library, ported from SGI's GLU implementation.

Schema definitions for GeoJSON types for use with Mongoose JS

A Leaflet Plugin For Editing Geometry Layers in Leaflet 1.0

This library may not be fast, but it is robust. Robust in the fact that it will find all of the self-intersections in a polygon - minus of course shared endpoints.

point in polygon searches for leaflet

Allow to drag Leaflet path

Drag feature functionality for Leaflet.draw

Extract elementary geometries from a geojson inheriting properties.

Fast geometry in geometry lookup for large GeoJSONs

This script finds all points where the polygons intersect each other.