Hello, The City of Baltimore provides a large amount of public domain GIS data through their data portal [1]. Included are city wide building footprints [2], which I would like to import into OpenStreetMap. Other users have already started importing this data in a less automated way. I confirmed with the city GIS office that the data is indeed public domain.
Using QGIS, I assigned approximate street addresses to each building using a parcel map [3] and used the field calculator to clean up the labels and remove abbreviations. In addition, I removed all data that intersected with existing buildings to preserve existing work. I then separated the data into smaller chunks and converted the Shapefiles to OSM with Merkaartor. After simplifying Merkaartor's output using osmconvert's "--drop-author" switch, I tagged the data with sed, before finally using JOSM to remove duplicate vertices and empty tags. My only qualm with the data is that some buildings have more nodes than they need, but I'm not sure what can be done about it besides manually reviewing and simplifying all 200k+ outlines. I've currently tagged the data with: building=yes addr:city=Baltimore addr:state=MD addr:country=US addr:inclusion=estimate source=Baltimore City GIS addr:housenumber=[Based on parcel data] addr:street=[Based on parcel data] I've uploaded the files here for feedback: http://db.tt/P9qh1hIm Thoughts, suggestions, questions? -Matthew Petroff [1] https://data.baltimorecity.gov/ [2] https://data.baltimorecity.gov/Geographic/Building-Footprint-Shape/deus-s85f [3] https://data.baltimorecity.gov/Geographic/Parcels-Shape/jk3c-vrfy _______________________________________________ Imports mailing list [email protected] https://lists.openstreetmap.org/listinfo/imports
