Operations for two-dimensional polygons.

Compute contour polygons using marching squares.

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

Combines two or more polygons into a single polygon.

Boolean operations on polygons (union, intersection, difference, xor)

Merges a specified property from a FeatureCollection of points into a FeatureCollection of polygons.

Finds the shared area between two polygons.

Takes a collection of points and a bounding box, and returns a collection of Voronoi polygons.

ThreeJS geometry for drawing polygons on a sphere

Generates random points, lines, or polygons for testing.

Takes a kinked polygon and returns a feature collection of polygons that have no kinks.

Calculates the geodesic area in square meters of one or more polygons.

Tesselates a polygon or multipolygon into a collection of triangle polygons using earcut.

Creates a grid of rectangular polygons with width and height consistent in degrees.

Finds the difference between multiple polygons by clipping the subsequent polygon from the first.

Takes a set of points and a set of polygons and/or multipolygons and performs a spatial join.

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

Index for matching points against a set of GeoJSON polygons

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

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