The OSM community some time ago adopted the ODbL license, which (roughly speaking) has two major requirements for users of our data:
- To contribute their own data back to OSM (the “share alike” clause)
- To include attribution on products built from our data
It’s almost certain that most mappers — especially those contributing regularly — have encountered a map on the web or in printed form based on OSM data that violated the attribution requirement in some way. The attribution text might have been shuffled out of the way, credit for our work given to somebody else, or the attribution was absent completely. By my estimate, around 10% of websites that use OpenStreetMap tiles lack proper attribution. This is in addition to an unknown proportion of maps with similar problems published on physical media (especially info panels installed outdoors), or ones using custom tiles not made by OSM. The problem is exacerbated by the fact that proper attribution is missing on widely-used map products published by large companies with hundreds of thousands to millions of users.
The OSM project celebrates its 20th anniversary this year, and one would expect that should be enough time to develop effective mechanisms for addressing license violations. This obviously is not the case. We as a community delegated the right to enforce the license to the OSM Foundation, but enforcement is something this institution has yet to demonstrate. All the OSMF has accomplished in this regard is to publish a “love letter” which individual volunteers are supposed to use, containing language that asks violators to fix the attribution problem. There is no follow-up procedure in place for situations when the violator fails to respond in the desired way. We also have no mechanism that actively looks for violations, relying instead on volunteers to report cases to one of a number of case-tracking lists that mappers created over time.