MassGIS' Level 3 Assessors’ Parcel Mapping data set was developed through a competitive procurement funded by MassGIS. Each community in the Commonwealth was bid on by one or more vendors and the unit of work awarded was a city or town. The specification for this work was Level 3 of the MassGIS Digital Parcel Standard. Standardization of assessor parcel mapping is complete for 350 of Massachusetts' 351 cities and towns. (Boston, which is not part of this project, is being processed separately). MassGIS is now incorporating updates from municipalities into the database.