Hi, Anthony wrote: > What are the sources for the post code areas? How often are they > updated? How are they defined (by reference to houses, by reference to > geographical features, by lat/lon, something else)? Will this data be > integrated into other OSM data, or is it basically just a separate layer?
We do have post code boundaries running together with administrative boundaries sometimes, or running along a road. In these cases I'd expect the post code area multipolygon to use these existing OSM features (provided they exist). It is unclear to me how the areas have been defined; my guess is that in innner-city areas, mostly roads have been used, and in the countryside they probably said something like "village A has this post code, village B has that, so let's draw a line in between". My guess is that someone, at some time, literally drew a line and lat/lon coordinates have been derived from that later. There is a post code database that is officially maintained but it is not free. The data we have is a few years old. Post codes in Germany don't change that often, however. Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org ## N49°00'09" E008°23'33" _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
