I have noticed that the land use data in my town (Andover, MA) is inaccurate and/or out of date. For example, conservation land boundaries are inaccurate or missing.
For the most part, OSM shows MassGIS as the source for this information. Now the MassGIS data are currently accurate in that regard, so I was wondering what is the best way to incorporate the updated information. For that matter, I am curious about how it got there in the first place.