OpenStreetMap

mapper999 has commented on the following diary entries

Post When Comment
Redundancy in Buildings about 18 hours ago

Hi,

I just had a look at the Berlin Fernsehturm and found several issues which might cause the missing label and the broken rendering:

  • The Fernsehturm consists of many different overlapping building=yes ways which should actually be building:part=yes. This is probably a leftover from early 3D-mapping when the building:part key was not yet used.
  • The main tags are on a building-relation which is not yet an approved nor widely used feature. It is also not supported on simple editors like iD etc. Instead there should be an area (or multipolygon) for the whole building complex with the main tags.
  • The Fernsehturm is many features in one: tourism=attraction, tourism=viewpoint, man_made=communication_tower. Not all of these tags are compatible with each other. Maybe the whole building complex should get the tourism=attraction, while the tower part gets the tourism=viewpoint and man_made=communication_tower. I think all the other man_made=tower tags should be deleted.
  • There have been a lot of 3d experiments going on for the tower with different tagging schemes.
  • There is a broken multipolygon with overlapping and touching inner rings for the pedestrian area around it, which probably causes the rendering issues.
  • There are some entrance and housenumber nodes near the building, where it is not really clear where they belong to.

The Berliner Fernsehturm is a very famous building in Germany, so a lot of mappers probably tried to "improve" it and added more and more tags and details.

I think the whole building complex needs a cleanup by an experienced mapper (with 3d tagging experience) who knows the area/building. The same probably applies to the other buildings you mentioned.

I don't think posting an issue for the renderer helps here. The building relation has been proposed 7 years ago and is still not approved nor is it really clear from the proposal how it should be used. The problem with the pedestrian area overlapping parts of the building is due to a broken multipolygon which is a tagging issue and not a renderer issue.

The first thing I mapped… about 1 month ago

Nice work. I like the fences and the 3d tagging.

The roads could have some more details like maxspeed, number of lanes for the "Landesstraßen", surface and sidewalks (if they are not separated from the road use the sidewalk-key and not separate footways).

Also some access restrictions could be useful. E.g. most of the small service ways seem to be private, not sure about the tracks, they might be restricted to agricultural vehicles.

And if you are interested in public transport you could add the local bus routes and add some more details to the railway line.

You see there's always more to do :). Have fun!