JSPM

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

turf dissolve module

turf line-to-polygon module

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

turf polygon smooth module

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

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

turf boolean-concave module

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

Polygon/polyline processing utilities

turf point-to-polygon-distance module

A JS library for finding optimal label position inside a polygon

A fast polyline and polygon clipping library.

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

Index for matching points against a set of GeoJSON polygons

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.

Convert a planar graph to a collection of nest polylines

Triangulates a complex polygon

Splits a convex polygon by a plane

Industrial strength point in polygon test

Constrained Delaunay Triangulation in 2D

Simplifies a planar graph

Javascript library for 2d geometry

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

Computes the closest point to a polytope in arbitrary dimensions

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

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

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

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

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.

turf extent module

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

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

Convex decomposition for 2D polygons

Polygon and line clipping and offsetting library for Javascript / Typescript - a port of Angus Johnson's clipper to WebAssembly / Asm.JS

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

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

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

turf polygon module

Javascript implementation of GEOS's Polygonize function

Extract elementary geometries from a geojson inheriting properties.

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

Drag functionality for Leaflet vector layers

Convex decomposition for 2D polygons

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

Fast geometry in geometry lookup for large GeoJSONs

Split a polygon using a polyline.

Baidu Map map-polygon Components for React.

Schema definitions for GeoJSON types for use with Mongoose JS

Polygon offsetting algorithm, aimed for use with leaflet

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

API to interact with Helio Finances program on EVM chains.

Return the centroid for a given convex polygon.

Allow to drag Leaflet path

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

Coordinate, linear, and area measure tool for Leaflet maps

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

CLI tool for Elephant Network

Everstake Wallet SDK for Javascript

Zoopla inspired freehand polygon creation using Leaflet.js.

utility for working with polygons (arrays of vec2s)

perform boolean operations on arbitrary polygons in 2d

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

A 2D constrained Delaunay triangulation library

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

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

point in polygon searches for leaflet

Determine if an x y coordinate exists in a polygon.

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

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

Mappls Maps official hybrid map SDK for angular & reactJS NPM

Greiner-Hormann clipping algorithm

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

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

Check if point is inside polygon

Any dimensional Minkowski sums of convex polytopes

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

chaikin's smoothing algorithm for 2D lines

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

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

Drag feature functionality for Leaflet.draw

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

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

Polygon tools

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

WebAssembly port of the Clipper2 library for polygon clipping and offsetting

2D / 3D closest point / proximity helpers

Polygon convex partitioning and triangulation.

Create N number of random points inside of a polygon

Check if two polygons overlap

Yandex.MapKit and Yandex.Geocoder for react-native

Detect if a polygon has self intersecting lines

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

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

Infinity Wallet connection SDK for DApp web3 connect integration

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

Ignite UI React Maps components.

triangulates a series of 2D contours

2D polygon/polyline analysis & processing utilities

Converts path commands for an SVG path to polygonal points.

Zoopla inspired freehand polygon creation using Leaflet.js.

Sveaflet = Svelte + Leaflet

2D/3D convex polygon tessellators

Javascript library for 2d geometry

US and canada state polygon - state outline

2D polygon clipping / offsetting (Sutherland-Hodgeman, Grainer-Hormann)

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

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

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

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.

高德地图 Polygon 编辑器。

Turns any GeoJSON shape into a list of geohashes

Clipping and geometric operations for spherical polygons.

clip a polygon with another

Agentic commerce tools for Boson and Fermion protocols

高德地图 MouseTool 绘制工具。

Yandex MapKit for React Native

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

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

Polygon equidistant offset

Interpolate circle to polygon for GeoJSON

chaikin's smoothing algorithm for any dimension lines

turf bbox module

Leaflet plugin to create polygon with circle, for touchscreen

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

Ultralight JS for Ethereum

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

Fast 2D contour line extraction / generation

Extracts the boundary of a binary 2D image

A module to check if a polygon self-intersects

Maps postal codes to polygons

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.

Computes a boolean combination of two planar graphs

Utilities to split GeoJSON geometries

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

a few point and polygon utils

triangulates a fontpath using poly2tri

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

n-dimensional boids simulation with modular behavior system

Wavefront OBJ parser (& exporter soon)

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

Coordinate, linear, and area measure tool for Leaflet maps

Ignite UI Angular map components.

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

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

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

test if 2D convex polygon is clockwise

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。

<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

Coordinate, linear, and area measure tool for Leaflet maps

A 2D collision checker for modern JavaScript games.

Yandex.MapKit and Yandex.Geocoder for react-native

Quickly find points in large sets of polygons

Leaflet plugin for drawing bezier splines from polylines and polygons

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

Source for all GeoJSON boundaries on Earth

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

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

Boolean operations on polygons

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。

Zoopla inspired freehand polygon creation using Leaflet.js.

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

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

🧊 HODL Wallet - Fast CLI crypto wallet!

Helper functions to convert BBoxes to multiple formats

Crypto wallet generator CLI tool

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

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

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

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

Polygon - Everstake Wallet SDK

Smoothing algorithm for 2D lines and polygons

Everstake Wallet SDK for Javascript

soundsright chain sdk

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

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

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

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

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

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。

CryptAPI's Library for NodeJS

turf boolean-point-in-polygon module

Merge solid polygons and decompose into convexes.

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

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

Compute visibility polygons by Triangular Expansion

Coordinate, linear, and area measure tool for Leaflet maps

Make svg polygon & star shape

Library for polygons operations

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

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

Quickly find points in large sets of polygons

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

Zoopla inspired freehand polygon creation using Leaflet.js.

## 简介 `canvas-mark-board` 基于原生canvas封装的图像标注工具，在 vue / react / 原生js 应用中都可以实现标注功能。提供了一系列事件和方法，用于管理标注对象、绘制标注形状、导入标注数据等操作。

## Demo

mongoose schema to support geojson fields

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.

determine if a polygon is clockwise or counter-clockwise

A simple javascript plotting boilerplate for 2d stuff.

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

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

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

Ignite UI Web Components map components.

Pipedream polygon Components

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

Converts GeoJOSN polygons to osm poly format file.

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

Gomjau-hogg notation tessellations of regular polygons

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

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

Interactive drawing of polygons on the map.

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

Performant & ergonomic 2D geometry in typescript

Zoopla inspired freehand polygon creation using Leaflet.js.

List of tokens on Ethereum and Ethereum-compatible chains

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

ElizaOS plugin for Zapper protocol integration - portfolio tracking, DeFi analytics, and blockchain data across 50+ networks

MCP server for OKX DEX Analytics - comprehensive DEX aggregator analytics with multi-chain support

Yandex.MapKit and Yandex.Geocoder for react-native

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.

Math utils for 2d graphics

Receives zip code polygon data and transforms it into geoJSON format

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

Yandex.MapKit and Yandex.Geocoder for react-native

turf rhumb-circle module

Yandex MapKit for React Native