En waarom had je hier 'surface' veranderd naar 'concrete'? way/241905796)

Een man_made=survey_point is iets heel anders dan een uitkijktoren... (node/7577291273)

I reverted your edit of this relation: relation/5659796. Please be more careful.

Inderdaad. En als beide kanten van een straat een andere naam hebben, geldt deze regel voor de name-tag: name:right=*

outdoor

Please correct your tagging mistakes on this (way/350177740/) and other stretches of waterway.

This combinations of tags on way/522904296 doesn't make much sense: if it's an asphalted road, then change it to highway=unclassified and remove the tracktype.

Wat highspeed is en wat niet, durft al eens wijzigen in OSM. Zal ik aan osm.wiki/WikiProject_Belgium/Conventions/Railways toevoegen dat alleen HSL1 - HSL4 highspeed=yes horen te hebben? Het stuk L36 & L37 doorheen moet dan ook nog worden aangepast.

Als je https://opendata.infrabel.be/ consulteert, kan je zien dat volgens Infrabel dit wel degelijk spoorlijn 27A is. Spoorlijn 27A heeft dan wel 3 sporen, nl. spoor A, spoor B en spoor X.

Of course. Adding landuse, retaining walls or embankments are things I usually don't get around to. My changesets are big enough already . ;-)

First, I can't help that there is often so much to correct, repair or improve even on or near a short stretch of railway.
Second, my edit summary is clear: I was working on railway line L161.
Third, I made no mistake there. There is no building, nor a ventilation shaft there. The railway (although still below ground level) is twice in the open air: the tunnel is interrupted. The 'hole' is as wide as the railway bed. That's not a shaft anymore. So I cut the long tunnel in shorter parts and removed the tunnel and layer tags from the short stretches which are in open air. This is a valid (and I'd say, a better) way of mapping the situation. There are ventilation shafts further north in the Boulevard Clovis (tagged with man_made=air_shaft) and south in the Boulevard Charlemagne (not mapped). But man_made=air_shaft is a dubious tag (used only 48 times in OSM). Man_made=ventilation_shaft is used more often, but is not a documented tag on the wiki...

Jakka, this is the second time in a few days that you 'reopen' a stretch of road which is still closed for all traffic! Refrain from such edits, as you don't seem to know what you're doing.

De polygoon is eigenlijk niet veranderd: die bevat dezelfde nodes in dezelfde volgorde. Maar de coördinaten van de nodes zijn wel veranderd.

Je bent er zelf verantwoordelijk voor... Ik heb indertijd iets veranderd aan die polygoon, maar als je naar de historie van bijna alle punten van die polygoon kijkt, ben jij de enige en eerste die ze veranderd heeft nadat lodde1949 ze heeft getekend.

Please review your work in this area: a lot of the houses have the wrong postcode and city. I repaired a few, but I'm not going to check them all.

By joining highway segments you damaged some hiking route relations. Please be more careful in the future.

Please do not add aeroway=hangar to buildings which have nothing to do with aeroways.

Sorry. I won't use it anymore for streetnames. Is there a better source for streetnames/adresses?

For several reasons. 1. It overlapped many existing residential and other landuses. 2. In the good old days such big polygons were acceptable but now it is much better work more detailed. It takes longer before the map gets some colour. But that the map looks better, doesn't mean that it (or the database) is better. 3. Such a big polygon is bound to become a cluttered multipolygon. I once spent many evenings cleaning, repairing and simplifying a forest which had become a multipolygon with many outers and inners, and had many polygons in it which were not part of the multipolygon. There are still plenty of such examples left.
So I don't believe it would work out well starting from such a big polygon. Not everyone works meticulously enough for that (and this polygon is a proof thereof).

Why did you change the ref tag of this road (way/234990711) from N7 (correct) to N50 (wrong)? I reverted it.