At Facebook, we’ve been releasing our Daylight Map to the public since March of last year. Daylight is a version of OSM that has been quality checked and validated to ensure that the resulting map is safe and of high quality. It is the map data that is used on Facebook maps. Our goal is to make OSM easier and safer to use which will then expand the use of OSM.

When building Daylight, we employ automated validation processes to find bad data. That bad data is then either deleted from the map or corrected in the OSM database. This diary will go over the map validation efforts we’ve made to the map to make Daylight safe to use.

The map validation efforts includes three parts: vandalism and profanity cleanup, relation repair, and Atlas Checks fixes.

Vandalism and Profanity Cleanup

In the last couple years, our engineering team has spent a lot resources to research how we can identify vandalism and profanity more systematically and more accurately. With these improvements to our detection tools, we were able to fix over 360 examples of vandalism and 16 instances of profanity on feature names all over the world.

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