US: The New York Public Library is developing Map Rectifier tool. It aims to allow people to use information archived on digitised historical maps and to tag them on a searchable interface, built on Open Street Map (OSM).
The tool first overlays these historical maps onto the OSM map. Drawing from the library’s map database, these maps belong to various domains like maps of building types for fire insurance purposes and agricultural maps of droughts. Users are then able to go into the overlay, and match markings on the original cartographer’s key.
Watch a video explanation of the NYPL Map Rectifier here: