A new map will be appearing, nice! As the goal of TransforMap is to make maps compatible, could you add (as a first step) an open license to your data? Perfect for later reuse by TransforMap would be Public Domain!
And from my personal OpenStreetMap experience, I want to point you to to the over 10.000 POIs mapped as 'vacant' in OSM: see on taginfo *=vacant and vacant=*, and for example Leipzig via Overpass Turbo.
What about the idea of using this already existing open database and building upon it? Like the way wheelmap does?