New diary entry by @mvexel: an extensive tutorial about creating a cooperative challenge for adding Microsoft Open Data Buildings to OSM one at at a time using #MapRoulette : https://www.openstreetmap.org/user/mvexel/diary/400460

Flagging and Liking Challenges - what do you think? https://blog.maproulette.org/2022/11/21/liking-and-flagging-challenges/