Thanks a lot for checking! You're right, that removed the house number (valuable data) and I've reverted the change. I also went through today's history to make sure I didn't have similar errors. Deletions were very few. I started with postcode values which are city name or state codes because they confuse http://nominatim.org/ Phone-numbers or names in postcodes are easy to identify. Places with 2-4 digit postcodes will be a challenge, I'm sure mappers pressed 'submit' to fast or broken imports. Fun were finding hospitals in the middle of a forest (wrong country even) or in the ocean. Long-term goal is to publish QA reports, we didn't find a student this summer (3rd project on osm.wiki/Google_Summer_of_Code/2019/Project_ideas#Nominatim)

Thanks. I found a building with the same address 100s of miles north, must be a strange stray duplicate. Deleted now.

I'm a bit puzzled by the building osm.org/way/637558932 It's not near Winnipeg and the postal code doesn't look like US or Canadian

Ja, das macht Sinn. Vielen Dank!

Lassen sie bitte diese Art von Vandalismus.

Gibt es auf der Adolfstrasse ein explizietes Schild, dass Pferde nicht dort reiten dürfen?

Anhand einiger anderer Änderungen wie einen Schulhof als Gefängishof auszuweisen (osm.org/way/239951011/history) oder Beschreibung wie "fortnite Apex gta" (osm.org/changeset/68832514), garnicht zu schweigen von "Test1" bin ich nicht sicher ob diese Änderung Ernst gemeint war.

I don't quite understand the change from admin_level=3 to admin_level=2. A value of 2 represents a country border osm.wiki/Tag:boundary%3Dadministrative Is this based on data that used similar named tag?

Can you add details on what changed in the changeset comments? "Hildesheim, Germany" doesn't give enough information. It looks like the population number got updated osm.org/node/18318938/history

Can you add readable comments to the changesets? Hundreds of comments "g" tell other mappers little of what you worked on. osm.org/user/Asensancho/history Can be as simple as "added buildings from satellite imagery"

Postleitzahl anhand deren Webseite korrigiert

Can I assume the name=Null is an import error on osm.org/node/5740123588

Fixed via osm.org/changeset/56700250

I see the rollback in changeset 53365582 from 11h ago. Thanks a lot.

Try the 'undelete' plugin for JOSM. It doesn't always work, e.g. when a way was meanwile edited but sometimes it's the fastest to get back the old version.

bei allen der letzten zwei Tage fehlt der tag. Ich werde http://qa.poole.ch/?zoom=11&lat=51.01845&lon=7.60832&layers=FTTFB0 nutzen um Drolshagen und Wenden grün zu bekommen, also den Tag hinzufügen, bevor ich andere Städte anfange

Does this island really exist or is it and the streets a mapping error?

related discussion https://github.com/twain47/Nominatim/issues/518

Do you remember what this change was about? There is no changeset comment and no named source. 13 relations and 7 nodes in a 50x70km area were changed.

Is it maxweight or maxheight for osm.org/way/67477605, osm.org/way/32987403, osm.org/way/32987400 ? '3.5' could be both for a bridge.

The tag 'aeroway=Tinshack's notes' and the 'history' tags looks like a copy&paste error on osm.org/node/2888377577