Hi all, I'm working to evaluate the transportation condition of an arbitrary site, but these sites do not usually fall into a rectangular space, so that using a bounding box to export data from OpenStreetMap won't give a precise geometry. Is there any option that I can export data with polygon selection, or do it offline in a clean way? Thanks in advance for your help, Jiachen asked 16 Aug '21, 05:00  JiachenLu |
2 Answers:
My favorite tool for extracting data from osm.pbf is OSMIUM https://docs.osmcode.org/osmium/latest/osmium-extract.html And next question is where to get the polygons with boundaries? https://osm-boundaries.com/Map of course! answered 16 Aug '21, 13:10  az09 |
For relatively small scale usage I would use overpass or overpass-turbo, you can describe a bounding polygon as a series of co-ordinate pairs, so probably most useful if you are using the same poly again & again or it has a relatively small number of nodes. If the area is already defined in OSM then this can be used directly in overpass queries (see the documentation for examples). I normally don't recommend Osmium directly because on some platforms there is quite a long dependency chain for compilation, and therefore it's not necessarily the tool to fix a little problem if not already in use. Most OSM ETL-style tools (osmconvert, osmosis, osmium-tool) will take a polygon file and allow you to clip a larger dataset by that polygon file. Both QGIS & JOSM allow the creation of OSM style polygon files directly. Persnally I find osmconvert satisfactory for this type of task. answered 18 Aug '21, 13:04  SK53 ♦ |
Thanks a lot! It worked like a charm