solved_date - gets set if deeposm.org gets a new import from the same NAIP, which doesn't include that tile (makes some assumptions about the pipeline... like we will always tile NAIPs the same)
raster_tile_x, raster_tile_y - used to determine if a finding is solved
flagged_count - track how many people flag a prediction, to hide bad ones
Finding Model
Most props are self-explanatory, and: