We are doing some research on Bonn's urban structure and historical buildings/ neighborhoods/ destinations. We would like to find all sorts of GIS data for Bonn (e.g., topography, building footprint, streets, land use and land cover, sociodemographics). Web searching has been challenging for us, as we don't speak German. Can someone recommend some web pages where open data can be found? Thank you!
Take a look at the Open Data Page of Bonn
https://opendata.bonn.de/
If you filter for "Geographie, Geologie..." you'll find some GIS data sets.
https://opendata.bonn.de/dataset?f%5B0%5D=field_tags%3A16
Hope this is helpfull
Did you checked about OSM Data ? (the quality is good for basique shape layers as roads, urbanisation, forests....)
http://download.geofabrik.de/europe/germany.html
OpenStreetMap provides very high data quality. I would strongly not recommend to use geofabrik. It is better to download osm dump in pbf format https://planet.openstreetmap.org/pbf/planet-latest.osm.pbf, than cut the required area using osmium-extract https://docs.osmcode.org/osmium/latest/osmium-extract.html and convert it to geojson with osm to geojson https://github.com/tyrasd/osmtogeojson or convert is to postgis using the standard tool. We develop a tool kit for using it with spatialite and GUI, but it is still work-in-progress http://igis.tk and http://igis.tk/cgi-bin/f.cgi/artifact/3c46541824e6ec22
web crawler? you may need a help from data scientists. One of my colleagues extracts data from websites by using R-scripts.
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