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(ESRI Shapefiles with ArcGIS .lyr and ArcView 3x .avl)
MassGIS derived the boundaries of the 14 counties in Massachusetts from the community boundaries datalayers. Three statewide layers are available:
For locations of the counties please see the Counties Index Map file size 2MB .
- COUNTIES_POLY - contains the 1:100,000 coastline (from the TOWNS coverage); single-part polygons, with each county comprising one or more features.
- COUNTIES_POLYM - contains the 1:100,000 coastline (from the TOWNS coverage); multi-part polygons, with one feature per county.
- COUNTYNC_POLY - contains the full municipal boundaries extending offshore (from the BOUNDARIES coverage)
Using ARC/INFO, the TOWNS and BOUNDARIES layers were dissolved based on the FIPS_STCO field for the COUNTIES_POLY and COUNTIESNC_POLY layers, respectively.
The COUNTIES_POLYM layer was produced in August, 2007, using ArcGIS 9.2 by dissolving the COUNTIES_POLY layer on unique FIPS_ID/COUNTY combinations, with summary statistics for AREA_ACRES.
COUNTIES_POLY and COUNTIES_POLYM contain these items:
COUNTYNC_POLY contains these items:
FIPS_ID Federal Information Processing Standard state/county code COUNTY County name AREA_ACRES County area in acres
The FIPS_ID - County pairs are as follows:
FIPS_COUNTY the unique identifier for each quad corner FIPS_ID Federal Information Processing Standard state/county code COUNTY County name
FIPS_ID COUNTY 25001 BARNSTABLE 25003 BERKSHIRE 25005 BRISTOL 25007 DUKES 25009 ESSEX 25011 FRANKLIN 25013 HAMPDEN 25015 HAMPSHIRE 25017 MIDDLESEX 25019 NANTUCKET 25021 NORFOLK 25023 PLYMOUTH 25025 SUFFOLK 25027 WORCESTER
MassGIS is maintaining these layers.
Last Updated 5/30/2007