# googlearchive/js-marker-clusterer

A marker clustering library for the Google Maps JavaScript API v3.

Repository: https://github.com/googlearchive/js-marker-clusterer
Canonical: https://ross.abutalabs.com/products/js-marker-clusterer
Homepage: https://googlemaps.github.io/js-marker-clusterer/docs/reference.html
Language: JavaScript
License: Apache-2.0
License Family: permissive
Archived: true
Last push: 2019-06-16T08:14:59+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4373, "days_push": 2635, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1261, forks 749 (observed 2026-08-28T04:04:10.155475+00:00)

## What it is
A JavaScript library that clusters large numbers of markers on Google Maps JavaScript API v3 maps, grouping them per zoom level. This archived repository is kept for historical purposes; development continues in the markerclustererplus package.

## Use cases
- cluster thousands of markers on a Google Map
- improve map performance with many markers
- group map markers by zoom level
- custom cluster icon images on Google Maps
- display dense location data on a web map

## When to choose
- you are maintaining a legacy project already using this library

## When to avoid
- starting a new project - use markerclustererplus instead
- you use a mapping library other than Google Maps v3

## Facets
- artifact type: library
- maturity: abandoned
- function: ui-components
- domain: web-development
- platform: browser
- tags: google-maps, marker-clustering, javascript, maps

## Member repositories
- googlearchive/js-marker-clusterer (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:10.155475+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 2026-08-30T05:04:18.952268+00:00, confidence not recorded.
  - readme: https://github.com/googlearchive/js-marker-clusterer (fetched 2026-08-28T04:04:10.155475+00:00, sha 83f97b98945f)
- Data as of 2026-08-30T08:39:29.467469+00:00.