Hi, I was asked to help with the import of cadastral data for a few municipalities in the Strzelce-Drezdenko county in Poland. Here are some details of this import, which is partly done already, but I'm going to wait with further upload.
Technical: The data is in shapefile format which looks like a direct conversion of the data internally (I belive) kept as a DXF by the antique software GIS offices use, which means it's basically a vector drawing rather than a geospatial database. I believe SQ9NIT, the user who imported the two initial municipalities, used grassgis tools to convert the wall segments into closed shapes and sanitize them, and added the following tags: building=yes source=Starostwo Powiatowe Strzelce Krajeńskie I have used the set of python scripts at https://github.com/balrog-kun/ewmapa2osm to produce OSM data, which relied on the line type attribute to set proper tags based on some manuals published by the company who I believe made the original software used by county geodesy service. Specific tags are documented in the python code, but basically it's building=* and building:type:pl=*. I used two source= values: Starostwo Powiatowe Strzelce Krajeńskie, survey Starostwo Powiatowe Strzelce Krajeńskie, raster depending on whether the original data indicates a given outline was surveyed. Building height and usage information is unfortunately not in the shapefiles I got for that particular county, must have been filtered out. I have already imported data for three of the municipalities using the account balrog-kun-imports with one chunk mistakenly uploaded from my normal account. Conflation with existing building data was manual, most of which data was authored by the same user who asked for help with the import. Conflation with existing address nodes was done using the python scripts at https://github.com/balrog-kun/osm-addr-tools. There's one municipality that is almost completely traced from imagery which I'm not going to work on, possibly except buildings that are automatically deterined to not intersect with any existing buildings. There's data for one more municipality that I'd like to import. It contains 4000 closed shapes. I have simplified the shapes (similarly to JOSM's simplify-way tool) but I imagine the density of nodes may still worry some of you. I believe it is similar to the French cadastre. You can look at some of the data around http://www.openstreetmap.org/way/250886166. Let me know if you find any issues with the data. Background and legal: The fire service in various parts of Poland has much success talking to local administration about providing data for use in OpenStreetMap. In the Strzelce-Drezdenko county user daroKPPSP from the local brigade obtained building outlines data (in some cases footprints) for the eight municipalities of that county, specifically for use in OSM. A long time mapper and also a fire fighter SQ9NIT imported two of these municipalities some time ago. Cheers _______________________________________________ Imports mailing list [email protected] https://lists.openstreetmap.org/listinfo/imports
