Hello,

Please do not trace buildings from aerial imagery.  They give a distorted view of buildings and we’ll have to redo everything.

When you are editing, you can change the background.  Hit the Background icon on the right of the screen and scroll down to "Digitaal Vlaanderen GRB".  You will find the correct outline of buildings, which you can use as a source.

Also, addresses in Belgium are only
House number + Street name.
Do *not* add postcodes and town manually, it is not necessary.  We already have large catch-all areas to do the job.

Happy mapping.