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I want to extract city specific data from OSM for Finland. I have the data for Finland but I need the data for only 5 cities: Helsinki, Espoo, Vantaa, Kauniainen and Siuntio. I could extract the required data for Helsinki, but I need the city borders for the rest of the cities (so I can make a polygon of that). If I have the polygons I can extract the required data with osmconvert. Can you help me with information on how to extract the borders for these cities? Do you know any open api that provides me these information? |
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Please have a look at question this question: You can download the full boundary with http://overpass-api.de/api/interpreter?data=(rel[name='Helsinki'];>;);out; and then convert the return value with http://svn.openstreetmap.org/applications/utils/osm-extract/polygons/rel2poly.pl into a polygon. 1
Again this will not work for Esbo, since it is a multipolygon and rel2poly doesn't support that..
(26 Jan '13, 22:37)
emj
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There are several things about borders and tools that you have to think about.
So do like the venerable metro extracts and draw your own bounding boxes for extraction and if it is important to only get specific data inside Esbo you can use pgsql to do that. You can see these polygons on Nominatim, and if you really want them you can cut and paste from HTML, but it will give and over view of what exactly you are getting instead of blindly copying from Overpass. Here are some examples, search for the rest on http://nominatim.osm.org You can copy the polygon from the javascript of those pages: Note that Esbo is a multipolygon, can osmconvert handle that? |
