# heremaps/harp.gl

3D web map rendering engine written in TypeScript using three.js

Repository: https://github.com/heremaps/harp.gl
Canonical: https://ross.abutalabs.com/products/harpgl
Language: TypeScript
License: Apache-2.0
License Family: permissive
Topics: map, javascript, typescript, webgl, harpgl, threejs, 3d, heremaps, heremaps-js
Archived: true
Last push: 2023-02-03T20:16:26+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2935, "days_push": 1307, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1313, forks 198 (observed 2026-08-28T04:04:20.382571+00:00)

## What it is
harp.gl is an open-source 3D map rendering engine written in TypeScript and built on three.js/WebGL. It enables themeable, high-performance 3D map visualizations in web applications with modular data providers.

## Use cases
- render 3D maps in a web browser
- build animated map visualizations with webgl
- create themeable maps that change style on the fly
- display custom map data with a modular rendering engine
- build a performant map application with web workers

## When to choose
- you need a customizable, themeable 3D map engine built on three.js
- you want full control over map data providers and rendering modules
- you are building a bespoke geospatial visualization and don't need vendor support

## When to avoid
- you want a production-supported mapping product - HERE recommends its Maps API for JavaScript instead
- you need active maintenance - development stopped in 2022 and releases have ceased
- you only need simple 2D maps or basic embedded maps

## Facets
- artifact type: library
- maturity: maintenance
- function: graphics, data-visualization, web-scraping
- domain: web-development, graphics
- platform: browser
- tags: 3d-maps, webgl, threejs, map-rendering, typescript, here-maps, geospatial, maps, web-server, nodejs

## Member repositories
- heremaps/harp.gl (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:20.382571+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 2026-08-30T04:48:51.686601+00:00, confidence not recorded.
  - readme: https://github.com/heremaps/harp.gl (fetched 2026-08-28T04:04:20.382571+00:00, sha aa012835fa4a)
- Data as of 2026-08-30T08:39:29.467469+00:00.