Hey Spaghetti Monster,

Please use sources appropriate for the area you are mapping and specify them actively when saving your edits.

For The Netherlands, use Esri and PDOK 8cm aerial. These should be readily available in JOSM. You can find other data sources, like the AHN (LIDAR height model), on the forums:
https://community.openstreetmap.org/t/de-beste-imagery-layers-om-nl-osm-te-mappen-met-josm/85393

If you need any help, comment on said thread, or start a new one.

Any inappropriate changes, being low accuracy or made using outdated sources, may be reverted by other mappers. If you continue to map inappropriately, the Data Working Group may have to step in. You are likely already aware of this.

Regards,

Daniel