Calculate the area of a simple polygon

Operations for two-dimensional polygons.

Fill a polygon with lines

Find self-intersections in geojson polygon (possibly with interior rings)

A simple polygon chart component for React apps

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

determine if a point is inside a polygon with a ray intersection counting algorithm

Checks if a point is inside an area, like a city boundary.

TypeScript definitions for d3-polygon

Calculates the distance from a point to the edges of a polygon or multi-polygon.

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

Smooths a Polygon or MultiPolygon, based on Chaikin's algorithm.

Takes polygons or multipolygons and an optional mask, and returns an exterior ring polygon with holes.

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

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

Finds points that fall within polygon(s).

Finds the tangents of a polygon from a point.

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

A JS library for finding optimal label position inside a polygon

Converts line(s) to polygon(s).