Recently I found the Dutch Nationaal Georegister (National Georegistry), which seems to be part of a larger movement to publish government data as open data. It includes some datasets on historical infrastructure that could be imported to OHM.
Recently I found the Dutch Nationaal Georegister (National Georegistry), which seems to be part of a larger movement to publish government data as open data. It includes some datasets on historical infrastructure that could be imported to OHM.