placemark/placemark
Some data may be outdated — see provenance labels.
A flexible web-based editor, converter, visualization tool, for geospatial data observed · 2026-09-25
Health v2 · maintenance only
82/100
- Activity 93
- Release rhythm 72
- Longevity 74
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 34
- age_days: 1049
- days_rel: 104
- days_push: 44
- n_releases_24m: 4
Adoption not part of the score
1462 stars · 125 forks observed · 2026-09-25
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Placemark is a free, open-source web application for creating, viewing, editing, and analyzing geospatial map data, built with MapLibre GL JS. It can be used via the hosted placemark.io instance or self-hosted by developers.
Use cases
- edit geojson files in the browser
- convert between geospatial data formats
- visualize map data on a basemap
- draw and edit polygons and points on a map
- self-host a geojson editor
- analyze geospatial data interactively
When to choose
- you need a browser-based editor for GeoJSON and other map formats
- you want an open-source alternative to geojson.io
- you need to convert or visualize geospatial data without installing desktop GIS software
When to avoid
- you need full professional GIS capabilities like advanced raster analysis or projections
- you need an offline desktop application
- you want a lightweight library to embed map editing in your own app rather than a standalone tool
Facets
application · maturity active
editor data-visualization geospatial web-scraping web-development data-visualization self-hosted cross-platform geojson maplibre map-editor gis converter typescript maps geospatial web-server nodejs
2 sources
- readme: https://github.com/placemark/placemark · fetched 2026-09-25 · 84c196ea4127
- homepage: https://placemark.io/ · fetched 2026-08-29 · 249152da7d89
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| placemark/placemark | main | 82 |
For agents
markdown · JSON · MCP: product_card(name="placemark/placemark")
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem