OHMG - Online Historical Map Georeferencer
www.ohmg.dev
Open source web application for georeferencing historical maps, enabling collaborative creation of georeferenced map mosaic layers.
OHMG turns old, static maps into interactive layers by aligning them with modern coordinates. The collaborative workflow lets multiple people contribute to large mosaics, so a scattered set of historical sheets can gradually become a cohesive, place-based archive. It is a practical tool for historians, map enthusiasts, and community projects that want to see how landscapes have changed over time.
Checked with Google Web Risk · 1 hour ago
- language
- EN
- here since
- August 2026