Geographic Information Systems (GIS) for web browsers.
For managing, analyzing, editing, and visualizing geographic data.
A compilation of geospatial-related web frameworks, tools, demos, applications, data sources and more.
Frontend GIS
GitHub repository ↗ synced 2026/8/9
👨💻 JavaScript Libraries
Mapping
antvis L7
Large-scale WebGL-powered Geospatial Data Visualization. 
ArcGIS Maps SDK for JavaScript
Modern JavaScript API and web component library for building interactive 2D and 3D web apps for the browser.
ArcGIS REST JS
Compact, modular JavaScript wrappers for the ArcGIS REST API that run in Node.js and modern browsers. 
Bertin.js
A JavaScript library for visualizing geospatial data and making thematic maps for the web. 
Cesium.js
An open-source JavaScript library for world-class 3D mapping of geospatial data. 
d3-geo
A library for creating maps based on D3.js. 
d3-geo-projection
Extended geographic projections. 
d3-geo-voronoi
Voronoi diagrams and Delaunay triangulation for the sphere. 
datamaps
Customizable map visualizations in one file. 
Deck.GL
WebGL2 powered geospatial visualization layers. 
Eurostat-map
Data-driven maps. 
globe.gl
This library is a convenience wrapper around the three-globe plugin, using ThreeJS/WebGL for 3D rendering. 
Google Maps
JavaScript API for Google Maps.
gridviz
A package for visualizing gridded data. 
HERE maps API
Build web applications with feature-rich and customizable HERE maps.
iTowns
A Three.js-based framework written in JavaScript/WebGL for visualizing 3D geospatial data. 
Leaflet
The leading open-source JavaScript library for mobile-friendly interactive maps. 
Map Forecast API
Simple-to-use library based on Leaflet 1.4.x. It allows you to show wind maps. 
Mapbox GL JS
JavaScript library that uses WebGL to render interactive maps from vector tiles. 
maplibre
It originated as an open-source fork of mapbox-gl-js, before their switch to a non-OSS license in December 2020. 
MapTalks.js
An open-source JavaScript library for integrated 2D/3D maps. 
OpenLayers
A high-performance, feature-packed library for creating interactive maps on the web. 
react-simple-maps
An SVG mapping component library for React, built on top of d3-geo. 
Tangram
WebGL map rendering engine for creative cartography. 
TerriaJS
A library for building rich, web-based geospatial data explorers. 
Wrld.js
Animated 3D city maps based on Leaflet. 
Libraries for creating web maps:
Data Processing
Arc.js
Calculate great circles routes as lines in GeoJSON or WKT format. 
awesome-GeoJSON
Catalogue of GeoJSON tools. 
Euclid.ts
2D Euclidean geometry classes, utilities, and drawing tools. 
flatbush
A really fast static spatial index for 2D points and rectangles in JavaScript. 
FlatGeoBuf
A performant binary encoding for geographic data based on flatbuffers. 
flatten-js
For manipulating geometrical shapes, finding intersections, checking inclusion, calculating distance, transformations, and more. 
Galton
Lightweight Node.js isochrone server. 
gdal3.js
Convert raster and vector geospatial data to various formats. 
geoblaze
A blazing fast JavaScript raster processing engine. 
geobuf
A compact binary encoding for geographic data. 
GeoTiff.js
Parse TIFF files for visualization or analysis. 
geolib
Library to provide basic geospatial operations. 
geopackage-js
The GeoPackage JavaScript library provides the ability to read GeoPackage files. 
geoparquet
Encoding geospatial data in Apache Parquet. 
geotoolbox
Provides several GIS operations for use with geojson properties. 
geojson-merge
Merge multiple GeoJSON files into one FeatureCollection. 
geojson-vt
A highly efficient JavaScript library for slicing GeoJSON data. 
Geometric.js
A JavaScript library for doing geometry. 
JSTS
JavaScript Topology Suite. 
koop
A JavaScript toolkit for connecting incompatible spatial APIs. 
math.gl
JavaScript math library focused on Geospatial and 3D use cases. 
Proj4js
Transform coordinates from one coordinate system to another. 
rbush
A high-performance JavaScript library for 2D spatial indexing. 
spl.js
Makes it possible to use SpatiaLite functionality in JavaScript. 
statsbreaks
Split a quantitative dataset into classes for thematic mapping. 
Turf.js
A JavaScript library for spatial analysis. 
topoJSON
Convert GeoJSON to TopoJSON for use in D3 maps. 
Wicket
A modest library for moving between Well-Known Text (WKT) and various framework geometries. 
Libraries that help you analyse and process geospatial data:
LiDAR
Plasio
Drag-n-drop In-browser LAS/LAZ point cloud viewer. 
Potree
WebGL point cloud viewer for large datasets. 
Potree & Cesium.js
Rezt, Austria LIDAR viewer.
Three.js
Point cloud data loader. 
Tools for visualizing point clouds with web browsers:
Remote Sensing
EOSDIS Worldview
Interactive interface for browsing global, full-resolution satellite imagery. 
Google Earth Engine
Geospatial processing service.
Sentinel Hub custom scripts
A repository of custom scripts to be used with Sentinel Hub. 
sentinelhub-js
Download and process satellite imagery using Sentinel Hub services. 
Spectral
Awesome Spectral Indices for the Google Earth Engine JavaScript API. 
Resources for frontend earth observation and remote sensing:
💾 Data sources
A collection of geospatial open data sources:
Downloads
ArcGIS Hub
Over 380,000 open datasets.
Copernicus global DEM
Global elevation tiles.
Copernicus open access hub
Copernicus satellite imagery download.
ETOPO1
1 arc-minute global relief model of Earth's surface.
European population grids - GISCO
Population figures in grid cells.
European Postcodes Point Data
Location of postal codes across Europe.
Geoboundaries
The world's largest open, free political boundaries database.
Global Biodiversity Information Facility (GBIF)
Open access to biodiversity data.
Global Climate Monitor
Global open climate data.
Global power plant database
Open source database of power plants.
Galileo
Geospatial data discovery and management platform.
Healthcare Services in Europe
Locations of healthcare services in Europe.
HydroSHEDS
Consistent hydrographic data for global applications.
NASA Earth Data
Search, discover, visualize, refine, and access NASA Earth Observation data in your browser with Earthdata Search.
Natural Earth
Free vector and raster map data.
OpenAerialMap
Open service for accessing licensed imagery.
OpenMapTiles
Free OpenStreetMap Vector Tiles.
OpenStreetMap
Free, world-wide geographic data set.
Open Topography
High-resolution topography data and tools.
Ookla internet speed data
Global network performance metrics. 
Sentinel Hub custom scripts
Repository of custom scripts for Sentinel Hub. 
USGS Earth Explorer
Query and order satellite images and more.
World Atlas TopoJSON
Natural Earth's vector data as TopoJSON. 
World Bank
Free access to global development data.
WorldPop
Open access spatial demographic datasets.
Data available for download:
Web APIs
Address API
Pan-European address data with geocoding and reverse-geocoding.
API Geo
Official French geographical data API.
ArcGIS location services
Basemaps, Geocoding, Places, routing, and GeoEnrichment.
bng2latlong
Converts British National Grid to latitude and longitude.
breezometer
Air Quality, Weather, Pollen, and Environmental data.
Country State City API
Database of city, state, and country data.
Geoapify
Geospatial services such as maps, geocoding, and routing.
geonames
Supports placename lookup and reverse geocoding.
Geocode.xyz
Reverse geocoding, forward geocoding, and geoparsing API.
GISCO data distribution API
European Commission data source for administrative regions and boundaries.
GraphHopper Route Optimization API
Solves various vehicle routing problems.
movebank-api
Platform for animal tracking data. 
OpenAQ
Largest open-source air quality data platform.
Open Charge Map API
Public registry of electric vehicle charging locations.
OpenCage
Forward and reverse geocoding API using open data.
Open-Meteo
Global weather forecast API.
Open Notify
ISS location and number of people in space.
Open Postcode Geo API
British postcodes with geospatial data.
OpenSky API
Retrieve live airspace information. 
openrouteservice
Directions, isochrones, and geocoding services.
OpenStreetMap
Retrieve OpenStreetMap data via Overpass API.
opentopodata API
Open Topography Data API.
Overpass API
Retrieve OpenStreetMap data.
RainViewer
Free weather radar and satellite data API.
REST countries
Get country information via a RESTful API.
Sunrise and sunset
Provides sunset and sunrise times for locations.
TomTom
Geocoding, routing, traffic, and more.
USGS earthquake data
Search earthquake data by various parameters.
ZipCheckup API
Free REST API for US ZIP-level environmental safety data: water quality, air quality, PFAS, radon, lead, flood risk. 
what3words
Converts 3-word addresses to coordinates.
PostalCodes
Global postal code search, country exports, and address validation data.
Restful APIs for consuming geospatial data on the fly:
Collections
awesome-public-datasets
An awesome repository full of open datasets from an abundance of different categories. 
Free GIS data
Links to over 500 sites providing freely available geographic datasets.
Public APIs
A collective list of free APIs for use in software and web development. 
WRI
World Resources Institute.
David Rumsey map collection
Historical map archives.
Compilations and repositories of open geospatial datasets:
📒 Notebooks
Some JavaScript notebooks to help you code:
Beginner
Hello, Leaflet
ObservableHQ.
Hello, Bertin.js
Nicolas Lambert.
Hello, Mapbox GL
Mike Bostock.
Hello, eurostat-map.js
Joe Davies.
Hello, gridviz
Nicolas Lambert.
Intermediate
World Tour
D3.
Choropleth
D3.
How to make a nice scalebar
Julien Gaffuri.
Hexgrid maps with d3-hexgrid
Larsvers.
Bivariate Choropleth with Continuous Color Scales
Stephanie Tuerk.
Advanced
Try to impeach this? Challenge accepted!
Karim Douieb.
Bars and pubs in Paris
Nicolas Lambert.
Brussels Street Gender Inequality
Karim Douieb.
Animating voting maps with regl
Benjamin Schmidt.
Election maps as dorling striped circles
Julien Gaffuri.
GeoParquet on the web
Kyle Barron.
Interactive Regl wind demo
Daniel Kao.
Dorling cartogram of the Spanish Presidential election
Adrián Blanco.
Visualizing earthquakes with Three.js
Joe Davies.
GeoArrow and GeoParquet in deck.gl
Kyle Barron.
:world_map: Web maps
Map of notable people
Topi Tjukanov.
Submarine cable map
TeleGeography.
Radio Garden
3D Globe Radio Tuner.
Map of every building in the United States
New York Times.
Map of the Roman transport network
The Stanford Geospatial Network Model of the Roman World.
WebGL Wind
A WebGL-powered visualization of wind power. Capable of rendering up to 1 million wind particles at 60fps. 
Statistical Atlas
A leaflet-powered atlas showcasing Eurostat's statistics.
ShadeMap
Every mountain, building and tree shadow in the world simulated for any date and time.
ClimateArchive
An interactive visualisation of climate model data across time and space.
Old Maps Online
Browse historical places and search for old maps with timeline.
chronotrains
Where can you go by train in 8h?
Castlemap
The world's 2,400 great castles on one night map, built from Wikidata.
Europe Beach Map
Every notable European beach on one map, with sea temperature, sand and best season for each.
Detourmap
70,343 places worth a detour — ruins, caves, waterfalls, castles and ghost towns — on one world map, built from Wikidata.
A compilation of interesting web maps:
🌐 Web apps
city roads
Render every single road in any city at once. 
Datawrapper
Create charts, maps, and tables.
Fantasy Map Generator
Free web application for creating and editing fantasy maps. 
GeoLibre
A lightweight, cloud-native GIS platform for visualizing, exploring, and analyzing geospatial data across desktop and web environments, with a responsive layout for mobile screens. 
geotiff.io
Provides quick access to easy-to-use raster processing.
IMAGE
Tool for generating thematic maps.
Kepler
A powerful open-source geospatial analysis tool for large-scale datasets.
magrit
An online application for thematic mapping.
mapshaper
Online editor for map data.
MapOnShirt
Create colorful designs from maps and turn them into products.
Maputnik
Free and open visual editor for Mapbox GL styles. 
mapus
Tool for collaboratively exploring and annotating maps. 
Peak Map
Visualizes elevation of any area on the map with filled area charts. 
Plasio
Drag-n-drop in-browser LAS/LAZ point cloud viewer. 
StoryMap JS
Open-source alternative to ESRI's Story Map application.
TopoExport
Export 2D contour lines and 3D topography using open-source datasets.
uMap
Create maps with OpenStreetMap layers and embed them in your site. 
bboxFinder
Helper page for finding bbox values from a map.
geojson.io
A quick, simple tool for creating, viewing, and sharing spatial data.
GeoJSONLint
Use this site to validate and view your GeoJSON.
Pharos AI
Open-source real-time intelligence dashboard for geopolitical conflict tracking with interactive DeckGL/MapLibre geospatial visualization. ([Source Code](https://github.com/Juliusolsson05/pharos-ai)) 
Pumperly
Open-source fuel price comparison and EV charging route planner using MapLibre GL JS, PostGIS, Valhalla routing, and Photon geocoding. 
gpx studio
Online tool for GPX editing.
Plug-and-play geospatial web apps:
🎨 Colour advice
CartoColor
A set of custom color palettes built on top of standards for color use on maps. 
Chroma.js Color Palette Helper
Chroma.js-powered tool for mastering multi-hued, multi-stop color scales. 
ColorBrewer
Colour advice for maps, based on Dr. Cynthia Brewer's research.
Dicopal.js
Discrete color palettes for JavaScript. 
Textures.js
JavaScript library for creating SVG patterns, designed for data visualization. 
viz-palette
Tool optimized for tweaking, copying, and pasting colors in and out of JavaScript.
Colour usage is very important in data visualisation and cartography. Here are some tools to help you choose the best colours for your maps:
📍 Icons
font-GIS
A very very cool icon font set for use with GIS and spatial analysis tools. 
Map Icons Collection
A set of more than 1000 free and customizable icons to use as placemarks for your POI (Point of Interests) locations on your maps.
Material Symbols
Over 2,990 glyphs in a single font file with a wide range of design variants.
Geoapify map marker playground
The Marker Icon API lets you create beautiful icons and use them as Map Markers.
Icons to add to your GIS websites:
📺 Videos
10 Maps, and the Tech and Stories Behind Them
Maarten Lambrechts.
Videos of web mapping presentations and tutorials:
📚 Further reading
Fundamentals of Data Visualization
Claus O. Wilke.
A Workbook for Interactive Cartography and Visualization on the Open Web
Robert Roth, Carl Sack, Gareth Baldrica-Franklin, Yuying Chen, Rich Donohue, Lily Houtman, Tim Prestby, Robin Tolochko, Nick Underwood. 
Color use guidelines for mapping and visualization
Cynthia A. Brewer.
Geospatial Network Visualization
A collection of visualization techniques for geospatial network data.