Hi! I’m mapper currently working for Mapy.cz. We make changes in OSM according to the guidelines for organized editing. We are fixing errors in data and also forwarding bug reports from our users in form of OSM notes. Our team uses the hashtag #Mapycz for our edits. For more information about Mapy.cz’s work, click here

osm.wiki/Organised_Editing/Activities/Mapycz