F3DB Workshop Erlangen

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Members of the OpenStreetMap community with interest in 3D and indoor mapping development met for the first time at the F3DB Workshop This meeting adressed open/not well arranged aspects of 3D and indoor mapping in OSM.

Eat and drink

Breakfast, lunch and drinks ( Water, Coke, Coffe, Juice ) are provided free of charge.


During the weekend we could talk about the most aspects.

  • Saturday
    • 10.00-10.30 Acquaintance round, snacks
    • 10.30-12.00 General idea presentation. How much of 3D do we need?
    • 12.00-13.00 Presentation of existing solutions, improvement of S3DB.
    • 13.00-13.30 Lunch
    • 13.30-16.00 Tagging discussion, alternatives
    • 16.00-16.15 Coffee break
    • 16.15-18.80 Tagging discussion,
  • Sunday
    • 10.00-12.00 Tagging discussion
    • 12.00-12.30 Lunch
    • 13.30-14.00 Conclusions, next steps


The F3DB wikipage should be changed in november 2014 bz Thomas Greichen and Marek. Be patient.


Protocol F3DB Workshop Erlangen (tagging discussions only)

Day 1

Basic conventions:

  • mapped rooms should represent "brutto areas" (consensus, with comment by Vladimir)
  • same tags as outside should be used for facilities (consensus)

Indoor elements:

  • mapping the indoor areas is the first step; adding walls for "3D" representation of floors is not required (but recommended)
  • default width of walls (e.g. 10 cm inner wall, 25 cm outer wall) can be overwritten
  • no consensus whether a separate element type for "room" with walls by default should exist
  • "corridor" elements are problematic because of multi-use spaces

Windows, doors, openings:

  • should be mapped as nodes
  • the concept of an "opening" distinct from windows and doors was discussed, perhaps to be tagged as door=opening, window=opening?
  • door opening direction should be based on wall direction, as this solution is unambiguous. Editor styles should be configured to show wall directions.


  • rooms are automatically ceilings for the floor below (consensus)
  • for some cases (e.g. concert hall) the ability to explicitly map ceilings might be useful in the future
Day 2
  • there should be a seamless transition between 2.5D (~ simple indoor) to full 3D


  • no consensus whether artificial ways for routing should be manually added in addition to the indoor areas to avoid the more complex algorithms for area-based routing

Stairs and elevators:

  • stairs should be mapped as a way with tags (e.g. step_count). Their nodes can be tagged with level/height tags.
  • inconclusive discussions about elevators (e.g. whether there should be only one area or one per level) -> participants should continue to think about the problem


  • Marek introduces a tagging scheme for roofs: each face of the roof is mapped as an area, and 3+ nodes of each area need to have a height tag
  • the new roof tagging scheme could replace Aschillis "roof lines" and represent even vertical roof faces
  • the JOSM validator should be modified to no longer issue a warning for nodes with the same lat/lon, but different height

Level numbering:

  • the basic idea is to have numbers that are independent from the local level names
  • the F3DB wiki page will be updated with results from a discussion with Thomas Graichen


Name Project From Arrival Accomodation
Marek Strassenburg-Kleciak F3DB Germany Erlangen,Poland by foot own flat
Thomas Graichen F3DB,University Chemnitz Germany Sachsen by wire :-)
Pawel Marynowski
Mockup indoor website[1] Poland team TBC
Vladimir Elistratov
Prokitektura[2] Russia Plane Mareks house
Tomasz Kędziora
Kendzi3d Poland team TBC
Tobias Knerr
OSM2World Germany Passau by train
Hongchao Fan University Heidelberg, Team Prof. Zipf Germany Heidelberg by car
Roland Olbricht OSM API 0.7 Germany Bonn by car
nn Opensciencemap, university Bremen Germany Bremen by train
Markus Bärlocher OpenSeaMap Germany by car own flat
Stefan Langguth N-Solut GmbH Germany by train
Stefan Scholz Elektrobit GmbH Germany
NN Mapper Germany
Oleksandr Fesenko Mapper Ukraine by car

See also


F3DB Erlangen.pdf