JSPM

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

a JavaScript library for performing geospatial operations with GeoJSON

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

turf points-within-polygon module

turf buffer module

turf circle module

turf tesselate module

Polygon offsetting algorithm, aimed for use with leaflet

perform boolean operations on arbitrary polygons in 2d

Fill a polygon with lines

turf mask module

turf envelope module

turf polygon-to-line module

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

turf point-on-feature module

turf tag module

turf polygon tangents module

turf line-to-polygon module

turf dissolve module

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

turf polygon smooth module

A very simple script to compute all self-intersections in a GeoJSON polygon.

turf boolean-concave module

turf point-to-polygon-distance module

Polygon/polyline processing utilities

A JS library for finding optimal label position inside a polygon

A port of Clipper2(C#) to js/ts.

A 2D constrained Delaunay triangulation library

Javascript library for 2d geometry

Conversion and preparation of thi.ng/geom shapes & shape groups to/from AxiDraw pen plotter draw commands

HTML5 inspired canvas that can be rendered to PNG with no native dependencies.

Exactly test if a point is inside, outside or on the boundary of a polygon

A Leaflet Plugin For Editing Geometry Layers in Leaflet 1.0

Reference Implementation of the Dufour-Peyton Intersection Algorithm. Calculates the Intersections of Arbitrary Polygons with a Geospatial Raster.

Index for matching points against a set of GeoJSON polygons

Industrial strength point in polygon test

Triangulates a complex polygon

Splits a convex polygon by a plane

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

Convert a planar graph to a collection of nest polylines

Constrained Delaunay Triangulation in 2D

Computes the closest point to a polytope in arbitrary dimensions

clip a polygon with another

Simplifies a planar graph

Headless 2D shape drawing, filling & rasterization for arbitrary targets/purposes (no canvas required)

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

Remove self intersections, t-junctions and duplicate edges/vertices from a planar straight line graph

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

The Maps component is used to visualize the geographical data and represent the statistical data of a particular geographical area on earth with user interactivity, and provides various customizing options

A library of intersection algorithms covering all SVG shape types

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

A library of intersection algorithms covering all SVG shape types

turf extent module

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

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

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

Takes a complex (i.e. self-intersecting) GeoJSON polygon, and breaks it down into its composite simple, non-self-intersecting one-ring polygons.

Convex decomposition for 2D polygons

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

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

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

Maker.js, a Microsoft Garage project, is a JavaScript library for creating and sharing modular line drawings for CNC and laser cutters.

Dissolve contiguous GeoJSON LineStrings and Polygons into single units.

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

Drag functionality for Leaflet vector layers

Photo Sphere Viewer plugin to display various markers/hotspots on the viewer.

Fast geometry in geometry lookup for large GeoJSONs

Javascript implementation of GEOS's Polygonize function

turf polygon module

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

Extract elementary geometries from a geojson inheriting properties.

Convex decomposition for 2D polygons

Split a polygon using a polyline.

Baidu Map map-polygon Components for React.

Methods for spatial operations on (Multi)Polygons

Schema definitions for GeoJSON types for use with Mongoose JS

Small, no dependency library for offsetting polygons. Heavily based on this [CodePen](https://codepen.io/HansMuller/pen/lDfzt) by Hans Muller.

Return the centroid for a given convex polygon.

Allow to drag Leaflet path

SDK for EVM chains, used in conjunction with @wormhole-foundation/sdk

API to interact with Helio Finances program on EVM chains.

Coordinate, linear, and area measure tool for Leaflet maps

Minimum bounding rectangle implementation in JavaScript. Uses `concaveman` and `mathjs` as dependencies.

Everstake Wallet SDK for Javascript

utility for working with polygons (arrays of vec2s)

Functional, polymorphic API for 2D geometry types & SVG generation

Zoopla inspired freehand polygon creation using Leaflet.js.

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.

compute the area of a 2d polygon

Reverse geocoding to determine the location where it is contained (continent, country, region and state) from the latitude and longitude specified. This module also has tools to get lists of continents, country groupings, countries, regions and states in

Compute distance from a point to an arbitrary shaped polygon, line, or point

Calculate the area of a simple polygon

point in polygon searches for leaflet

A pure javascript implementation of the QuickHull algorithm for finding the smallest polygon enclosing a set of points

Small, typed, dependency free tool to round corners of 2d-polygon provided by an array of { x, y } points.

CLI tool for Elephant Network

Determine if an x y coordinate exists in a polygon.

Mappls Maps official hybrid map SDK for angular & reactJS NPM

Merge non continuous geojson polygons into multiples concave polygons based on polygons distance.

Any dimensional Minkowski sums of convex polytopes

Check if point is inside polygon

a lightweight yet faster osm (either in xml or in json formats) to geojson convertor - 4x faster than xmldom + osmtogeojson in most situations - implemented in pure JavaScript without any 3rd party dependency

chaikin's smoothing algorithm for 2D lines

For given polygon finds if any of segments intersect with each other

JavaScript tool for working with polygons. It uses several basic principles to be super simple and super universal.

Drag feature functionality for Leaflet.draw

Polygon tools

Package for encoding / decoding images, transforming images, applying filters, drawing primitives on images on the client side (no need for server Node.js)

Draw lines and polygons with canvas. Save and load path to canvas.

2D / 3D closest point / proximity helpers

Polygon convex partitioning and triangulation.

Check if two polygons overlap

Create N number of random points inside of a polygon

Yandex.MapKit and Yandex.Geocoder for react-native

Detect if a polygon has self intersecting lines

Turns SVG shapes (polygon, polyline, rect, g) into SVG paths. It can merge groups and apply transforms.

Fast 2D contour line extraction / generation

Ignite UI React Maps components.

Library to convert geohashes to multiple GeoJSON polygons or a single GeoJSON FeatureCollection

Infinity Wallet connection SDK for DApp web3 connect integration

Customizable nD polyline interpolation, re-sampling, splitting & nearest point computation

triangulates a series of 2D contours

Converts path commands for an SVG path to polygonal points.

2D polygon/polyline analysis & processing utilities

Sveaflet = Svelte + Leaflet

Zoopla inspired freehand polygon creation using Leaflet.js.

US and canada state polygon - state outline

2D/3D convex polygon tessellators

Javascript library for 2d geometry

Refactored Leaflet plugin for drawing freehand polygons, with support for mobile

高德地图 Polygon 编辑器。

Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams

高德地图 Polygon 编辑器。

TippingChain SDK - On-chain tipping with USDC payouts on ApeChain

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

Turns any GeoJSON shape into a list of geohashes

构造多边形对象，通过 PolygonOptions 指定多边形样式。

Return random position inside geoJson Polygon or MultiPolygon

Agentic commerce tools for Boson and Fermion protocols

高德地图 MouseTool 绘制工具。

Yandex MapKit for React Native

Interpolate circle to polygon for GeoJSON

2D line & convex polygon clipping (Liang-Barsky / Sutherland-Hodgeman)

Plugin that selects feature(s) by drawing an area on the map

Boolean operations on polygons

Polygon equidistant offset

2D Polygon math: boolean operations, triangulation, graphs, support for holes and non-convex shapes.

chaikin's smoothing algorithm for any dimension lines

Leaflet plugin to create polygon with circle, for touchscreen

turf bbox module

Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams

Ultralight JS for Ethereum

A module to check if a polygon self-intersects

Extracts the boundary of a binary 2D image

Computes a boolean combination of two planar graphs

Utilities to split GeoJSON geometries

TypeScript library for polygon boolean operations

Two dimensional vector math library for JavaScript. Built for performance in computation-heavy real-time engines without sacrificing usability. Supports tree shaking and dead code removal to avoid bloating client-side bundles. Zero dependencies.

a few point and polygon utils

n-dimensional boids simulation with modular behavior system

Wavefront OBJ parser (& exporter soon)

sample the signed distance field of a polygon in 2d space

Turns lineTo, moveTo, quadratic & bezier curves into discrete Vector2 points

triangulates a fontpath using poly2tri

Highly configurable, fuzzy line & polygon creation with presets and composable fill & stroke styles. Canvas & SVG support

一个用于图片标注的javascript库，基于canvas，简单轻量，支持矩形、多边形、点、折线、圆形。

IGES 5.3 serializer for (currently only) polygonal geometry, both open & closed

Coordinate, linear, and area measure tool for Leaflet maps

Coordinate, linear, and area measure tool for Leaflet maps

Receives a Coordinate and ellipse properties and aproximates a ellipse by creating a polygon that fills its area

Ignite UI Angular map components.

<p align="center"> <br /> <a href="https://createweb3dapp.alchemy.com"> <img src=".github/images/cw3d-logo.png" width="200" alt=""/></a> <br /> </p>

Coordinate, linear, and area measure tool for Leaflet maps. Forked from LJA Engineering, Inc - GIS

test if 2D convex polygon is clockwise

Maps postal codes to polygons

A 2D collision checker for modern JavaScript games.

Leaflet plugin for drawing bezier splines from polylines and polygons

The SVG Path Interpolator produces point data representing interpolated values within an SVG path.

Quickly find points in large sets of polygons

Yandex.MapKit and Yandex.Geocoder for react-native

CLI to create decentralized applications (dapps) using [Scaffold Alchemy](https://github.com/alchemyplatform/scaffold-alchemy).

Source for all GeoJSON boundaries on Earth

一个用于图片标注的javascript库，基于canvas，简单轻量，支持矩形、多边形、点、折线、圆形、网格。

Polygon near-linear time triangulation (based on Seidel's algorithm) with ear clip for small cases. Handles degenerate cases of colinear edges and vertices touching edges.

A library used to construct a visibility polygon for a set of line segments

Helper functions to convert BBoxes to multiple formats

Crypto wallet generator CLI tool

An algorithm to decompose polygons with holes from "A practical algorithm for decomposing polygonal domains into convex polygons by diagonals" by J Fernández

Zoopla inspired freehand polygon creation using Leaflet.js.

SDK for EVM chains, used in conjunction with @wormhole-foundation/connect-sdk

🧊 HODL Wallet - Fast CLI crypto wallet!

Converts polylines, wkts, wkbs, polygons, circles, rectangles, as well as standard geoJSON into geoJSON MultiPolygon Feature Objects. Converts wkb_list and FeatureCollection to arrays.

WebAssembly port of the Clipper2 library for polygon clipping and offsetting

SDK for EVM chains, used in conjunction with @wormhole-foundation/connect-sdk

Smoothing algorithm for 2D lines and polygons

Native modules to determine if a location is within defined geographical boundaries using Google Geometry library

Polygon - Everstake Wallet SDK

Everstake Wallet SDK for Javascript

javascript library that allows drawing a polygon shape over a Google Map and get it's coordinates

n8n node for accessing multiple blockchain networks (Ethereum, BSC, Polygon, Fantom, Avalanche, Arbitrum, Optimism, etc.) with comprehensive analytics and data retrieval capabilities

A CLI tool to download verified smart contract source code from Etherscan and other block explorers using the Etherscan V2 API.

soundsright chain sdk

Fork of kittykatattack's bump library for PixiJS (https://github.com/kittykatattack/bump), wrapped into npm package

SDK for EVM chains, used in conjunction with @wormhole-foundation/connect-sdk

CryptAPI's Library for NodeJS

一个用于图片标注的javascript库，基于canvas，简单轻量，支持矩形、多边形、点、折线、圆形、网格。

SDK for EVM chains, used in conjunction with @wormhole-foundation/connect-sdk

Merge solid polygons and decompose into convexes.

SDK for EVM chains, used in conjunction with @wormhole-foundation/connect-sdk

Performant & ergonomic 2D geometry in typescript

a faster & more complete OSM & Overpass (either in xml or in json formats) to geojson convertor - 4x faster than xmldom + osmtogeojson in most situations - implemented in TypeScript with txml for XML parsing

turf boolean-point-in-polygon module

Coordinate, linear, and area measure tool for Leaflet maps

Compute visibility polygons by Triangular Expansion

Library for polygons operations

Make svg polygon & star shape

A Multichain crypto wallet library that supports Ethereum, Bitcoin, Solana, Waves and other EVM compatible blockchains E.g. Binance Smart Chain, Polygon, Avalanche etc.

SDK for EVM chains, used in conjunction with @wormhole-foundation/connect-sdk

Official MCP (Model Context Protocol) server for UniVoucher.com - the world's first decentralized crypto gift card protocol. Provides comprehensive documentation access and live API integration for building on the UniVoucher ecosystem across multiple bloc

Quickly find points in large sets of polygons

Zoopla inspired freehand polygon creation using Leaflet.js.

mongoose schema to support geojson fields

## Demo

A simple javascript plotting boilerplate for 2d stuff.

determine if a polygon is clockwise or counter-clockwise

Core contracts for the Complus Network on top of Polygon - Matic Network

Typescript package used to batch smart contract read calls into a single tx through the use of a multicall contract.

Ignite UI Web Components map components.

Provides feature drawing functionality for Ember-Leaflet, based on wrapping the Leaflet Draw library

Pipedream polygon Components

A JavaScript port of the polyclip library

Converts GeoJOSN polygons to osm poly format file.

This is a utility function to calculate the bounding box of series of 2D points

Gomjau-hogg notation tessellations of regular polygons

A turf module to transform a LineString geometry to a (closed) Polygon geometry.

Interactive drawing of polygons on the map.

A suite of utilities used to implement bridges based on the Wormhole protocol.

SDK for EVM chains, used in conjunction with @wormhole-foundation/connect-sdk

determine if a point is inside a polygon with ray casting or winding numbers

SDK for EVM chains, used in conjunction with @wormhole-foundation/connect-sdk

List of tokens on Ethereum and Ethereum-compatible chains

Zoopla inspired freehand polygon creation using Leaflet.js.

Comprehensive blockchain integration platform with multi-chain support, smart contracts, DeFi protocols, NFT infrastructure, Bitcoin support, and seamless SDK ecosystem integration for IOTA Big3

Smoothes a polyline (as flat number array) using Chaikins Algorithm

Generate polygons around a point

Model Context Protocol server providing access to Tatum's comprehensive blockchain API across 130+ networks with 13 tools