Allmaps Docs

Looking for the homepage?

This is the Allmaps documentation site. Go to allmaps.org to visit the project’s homepage.

Introduction

Allmaps helps you georeference, explore, and use digitized historical maps. Its web applications, APIs, and open source libraries connect maps from libraries, archives, and museums to modern mapping tools.

The map images remain with the institutions that publish them and are accessed through IIIF. Allmaps does not store digitized map images or derived images like GeoTIFFs or map tiles. It stores georeferencing data separately as Georeference Annotations. These small JSON documents describe how a map’s image coordinates relate to geographic coordinates, so the map can be placed on a modern map.

You can use Allmaps in your browser, integrate georeferenced maps into your own website, or build applications with its TypeScript libraries. Allmaps is built around open source software, open standards, and open data, making it easier to share your work and use it with other tools.

Where to start

• Find maps to georeference in digital collections published through IIIF.
• Georeference a map with Allmaps Editor.
• Discover maps in Allmaps contributed by the Allmaps community.
• View and use georeferenced maps in Allmaps Viewer and your own website.
• Use maps in other tools with XYZ map tiles, GeoTIFFs, and GeoJSON.
• Explore the API reference and TypeScript packages to build with Allmaps.

Get in touch

Have a question, found something unclear, or want to contribute? Contact us.