[tmcw]

Sure! So OpenStreetMap is great, and there’s a ton of data in it. There will be ways to move data from Placemark to OSM, but the main way to edit OSM will still be specialized editors like iD or JOSM.

As much as OSM contains, though, there are limits - data that isn’t “ground truth,” like planned routes or opinionated data, or geospatial data with private information, or data that’s annotations of particular satellite imagery.

Hope that makes things a little clearer! I was part of the team to create iD, the OSM editor, and am a big fan of OSM - Placemark serves a different purpose.