OpenStreetMap
Mapping buildings with roofs at different levels from awkward angles
Diposkan oleh Horza pada 9 Febuari 2018 dalam English Last updated on 10 Febuari 2018.This building can only be seen in the Esri imagery and that is from an awkward angle. How do I mark out the outline of this building accurately?
Edit: Building at 53.46, -2.23. Corner of Burleigh Street and Denmark Road
2nd Edit. Guess I should have mentioned. The east half of the building is taller than the west half. That’s where the problem is. Sorry.
Discussion
Ulasan Glassman terhadap 9 Febuari 2018 pada 20:55
Best practice would be to map the roof line accurately then move the outline to match what you can see where the building sits on the ground.
Ulasan andy mackey terhadap 9 Febuari 2018 pada 21:25
Have you looked here osm.wiki/Roof_modelling
Ulasan Horza terhadap 10 Febuari 2018 pada 12:02
Andy: Yes, this is the relevant bit osm.wiki/Roof_modelling#Modelling_of_outlines_of_building_with_different_heights
That only works if you can see where the two different sections of roof meet though.
Glassman: That’s what I’d usually do, but the west half of the building is about half the height of the east half, which I guess I should have mentioned in the diary, anyway…
I’ve used that to get an approximate mapping for now. I mapped the east half of the building, moved it halfway down, then mapped the west, then moved it the rest of the way to the ground. I go near here occasionally so I’ll take a small diversion and count floors at some point.