|Reference number from the BAG database containing addresses and buildings in the Netherlands.|
|Used on these elements|
|Tools for this tag|
This key contains the reference number (ID) from the BAG database containing addresses and buildings in the Netherlands. One can look up the record in the database using bagviewer.kadaster.nl (Dutch). Note that this website requires 16 digit ID's for buildings, append a zero (or two or three) in front of the ID if necessary. When using the tag2link plugin in JOSM you can open the bag viewer by right clicking on the tag and choosing "Open in BAG Viewer". This automatically adds leading zeros if necessary.