Hi everybody,
I’m currently preparing an exposure model for Attica. This model is describing all buildings and their vulnerability to earthquakes. In order to do this, I am associating each building in OSM to the municipality it is located in. While extracting the municipality boundaries in Attica from OSM, I noticed two major discrepancies to the boundary data from www.gadm.org (I do not refer to gadm being imprecise but the boundaries being vastly different):
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According to OSM, the island Agios Georgios seems to officially belong to the municipality of Lavreotiki but in the OSM it is associated to the
municipality of Hydra. GADM and https://geodata.gov.gr/en/dataset/oria-demon-kallikrates associate the island to Lavreotiki and so I tend to believe that this might be correct. If so, it would be good if there is a consensus to associate the island with Lavreotiki instead of Hydra. -
In OSM I can find the boundary of Δήμος Τροιζηνίας (admin level 7 like all other municipality boundaries in Attica) but in GADM and the aforementioned website, this area is split into two municipalities: Troizinia-Methana and Poros. Again, the other source agree and contradict OSM.
Can anybody help me figuring out what the correct and current boundaries are and fix them? I’m happy to fix problem 1 but if problem 2 needs the import from the website, I’d prefer this to be done by somebody who understands Greek in order to avoid a copyright issue that may arise from me not understanding the text on the website.
Thanks a lot for your help!
Cheers from Berlin, Germany
-danijel