# TerriaJS/terriajs

A library for building rich, web-based geospatial 2D & 3D data platforms.

Repository: https://github.com/TerriaJS/terriajs
Canonical: https://ross.abutalabs.com/products/terriajs
Homepage: https://terria.io
Language: TypeScript
License: Apache-2.0
License Family: permissive
Topics: javascript, terriajs, cesium, leaflet, cesiumjs, leafletjs, 3d-globe, wms, czml, wps, webgl, catalog, data, charts
Last push: 2026-08-26T16:48:29+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 4572, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1357, forks 401 (observed 2026-08-28T04:04:29.531381+00:00)

## What it is
TerriaJS is a TypeScript library for building rich, web-based geospatial data explorers with 2D and 3D visualization, powered by Cesium/WebGL with a Leaflet 2D fallback. It supports large nested data catalogs, dozens of geospatial file and web service formats, time animation, region mapping, and shareable map URLs, and can be deployed as a static website.

## Use cases
- build a web-based 3D globe map viewer
- visualize geospatial data catalogs with WMS and WFS layers
- create a browser-based digital twin with 2D maps and 3D models
- map CSV data onto statistical regions like LGAs or electoral districts
- animate time-series geospatial layers over time
- let users drag-and-drop GeoJSON, KML, or CSV files onto a map
- share a map view as a reusable URL
- build a public open-data spatial data platform

## When to choose
- you need a full-featured geospatial data explorer with 3D globe and 2D fallback
- you must federate many data sources (WMS, WFS, Esri, CKAN, 3D Tiles) into one catalog
- you want a deployable-as-static-site map application without server-side dependencies
- you are building a spatial digital twin or government open-data map

## When to avoid
- you need a lightweight slippy map with a few markers
- you want a mobile-native mapping app rather than a web application
- you need heavy server-side geoprocessing rather than client-side visualization
- your team cannot work with a large TypeScript/React library and its build tooling

## Facets
- artifact type: library
- maturity: active
- function: data-visualization, geospatial, charts, ui-components, web-framework
- domain: data-visualization, web-development, simulation
- platform: browser, cross-platform
- tags: 3d-globe, cesium, leaflet, digital-twin, gis, wms, wfs, wmts, czml, geospatial-catalog, react, typescript, time-series, region-mapping, maps, web-server, nodejs

## Member repositories
- TerriaJS/terriajs (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:29.531381+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:41:48.907149+00:00, confidence not recorded.
  - readme: https://github.com/TerriaJS/terriajs (fetched 2026-08-28T04:04:29.531381+00:00, sha 5f80c0b91464)
  - homepage: https://terria.io (fetched 2026-08-29T12:00:19.035589+00:00, sha d51c92ee22e8)
  - site_page: https://terria.com/features (fetched 2026-08-29T12:00:19.045179+00:00, sha 430cdfd8e84d)
  - site_page: https://terria.com/about (fetched 2026-08-29T12:00:19.048805+00:00, sha a260f99a5829)
  - site_page: https://terria.com/pricing (fetched 2026-08-29T12:00:19.047012+00:00, sha 7be819e6fde4)
- Data as of 2026-08-30T08:39:29.467469+00:00.