WikiProject Belgium/Using AGIV Crab data/Working with AGIV Crab Data in JOSM

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General rules

  • Always use the most recent Agiv Imagery. These images have a better quality, and are better positioned than any other source in Flanders (the absolute mistake on the ground is guaranteed to be under 1 meter).
  • Always draw and correct already drawn buildings according to the above imagery. Drawing the buildings forces you to look closely at the housenumbers. This way, less mistakes will be introduced.
  • Never copy mistakes. When a housenumber looks suspicious, don't import it to OSM. When CRAB and OSM contain the same mistakes (due to automated imports), the differences can't be found, and nobody will fix them.
  • Every address must have an addr:housenumber=* and addr:street=* tag. All other tags (postal code, municipality, associatedStreet relation, ...) are optional, but they can help with clarifying the border-cases, or when working with data.

Without houses present in OSM

  • Load the OSM data of the street in JOSM by clicking on the streetname
  • Load the missing adresses in a new layer by clicking on the number
  • For each address node:
  • If it's unclear, or you just don't want to handle that house now, delete the address node.
  • In case the address belongs to a single house:
  • Move the address node so it's on top of the building (in the case it wasn't already)
  • Draw the general rectangle using the buildings tool plugin (b). This should copy the tags to the new building and delete the address node.
  • Use the extrude tool to adjust the building parts that stick out of the main rectangle. (x)
  • In case of a row of unmapped houses:
  • Move the address nodes on top of the houses
  • Draw one big rectangle over a straight row of houses using the building tool
  • Select the rectangle together with all address nodes (possible via the Utils2 plugin), and a corner of the rectangle marking the lowest number
  • Terrace the houses using the terracing tool (Shift+t)
  • Make sure the spacing of the houses is correct by moving boundary nodes of the houses around, and use the extrude tool to add more detail to the buildings only after the terracing
  • Select all buildings (CTRL+F with the query "building")
  • Copy all buildings (CTRL+C), and delete them. then paste them on the data layer.
  • Delete the import layer and upload the data layer.

With houses already present in OSM

  • Click on the streetname in the import page to load the data from OSM
  • Click on the "missing" number to load the missing addresses in a new layer. This will be used as a background layer.
  • Start at the lowest housenumber, and for every house
  • Correct the building with the available Agiv imagery (make sure to trace the ground and not the roof footprint).
  • Press K to load the housenumber tool, and adapt the settings
  • Use the background layer for every house as a control
  • Delete the background, import layer
  • Upload the data layer