Hi pitscheplatsch, 

I asked this questions myself in the forums and the response was  "If the information you have determined is relevant to the public and can be verified on the ground and there is a corresponding tagging for it, there is no reason not to enter this into the global OSM database"

I would like to identify the locations that people surf at, which means that a location that has breaking waves regularly is due to the formation of the land below.

I don't mind doing this privately either ( i just had trouble getting the strava heatmaps to overlay on a private uMap instance. 