Assessor Map IndexColumn AColumn BColumn CColumn DColumn E B1C1 B2C2D2 B3C3D3E3A4B4C4D4E4A5B5C5D5E5A6B6C6D6E6A7B7C7D7 B8C8 B9C9 B10 About MASS GISMASS GIS provides the MUNNI-MAPPER Basic GIS to most of the communities in Massachusetts. View the MuniMapper: Avon, MA here.