Margus Värton wrote: > I (ok, Tartu City Government :) ) have updated data for Tartu available > so it is time to consider upgrade. My personal point of view is that it > does not make sense to update areas and streets as these are well > maintained in OSM. It is totally different matter with buildings and > addresses. There has been significant amount of buildings built since > the data given to OSM was prepared. There is also a number of houses > which have two different addresses - one physical building with two > entrances from different streets having different addresses for example. > Currently these houses have issues with address tags. Actually I have no > idea how to tag these correctly. Any ideas?
The discussion page of the Karlsruhe schema suggests to tag the entrance of the house with the address information. This might be an option, only I assume the current data doesn't have entrance information?! In those cases we could add an entrance to the middle of the longest "wall" pointing to the street the address belongs to. The most challenging part would be, how to update existing buildings? Shall we search for the building by address and modify it with new points? Shall we delete and recreate all buildings? Or shall we find the non-existing buildings and add them? As a starting point it'd be cool to have the new dataset of buildings in OSM format. Thus we could implement some more automatic tool for the diff and update. > There is very nicely documented Karlsruhe house numbering schema: > http://wiki.openstreetmap.org/wiki/Karlsruhe_Schema , but even this > schema seems to ignore problem with dual-address building polygons. That's most likely because in Germany each (physical) house can only have one street name. It may have multiple house numbers though. For this case, there's the proposal to use addr:housenumber=1;2. Andre -- Nothing is as easy as it looks.
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