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MassGIS Data: Counties

November 2014

These layers show the boundaries of Massachusetts' Counties and was derived from the Municipalities layer.

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Overview

MassGIS derived the boundaries of the 14 counties in Massachusetts from the community boundaries layers. Datasets include:

  • COUNTIESSURVEY_POLYM - multi-part polygons, with one feature per county, created from the Municipalities polygons.
  • COUNTIESSURVEY_ARC - line features, created from the Municipalities arcs.
  • COUNTIES_POLY - contains the 1:100,000 coastline (from the Municipalities coverage); single-part polygons, with each county comprising one or more features.

For locations of the counties please see the Counties Index Map

Production

Using ArcInfo, the community boundaries layers as listed above were dissolved based on the FIPS_STCO field. Polygons were converted to linear features and coded for OUTLINE as described below in the Attributes section.

Attributes

The polygon layers contain these fields:

FIPS_ID Federal Information Processing Standard state/county code
COUNTY County name
POP1980 1980 Population
POP1990 1990 Population
POP2000 2000 Population
POP2010 2010 Population
POPCH80_90 1980-1990 Population Change
POPCH90_00 1990-2000 Population Change
POPCH00_10 2000-2010 Population Change
SQ_MILES Area in square miles
SQ_KM Area in square kilometers

The FIPS_ID - COUNTY pairs are as follows:

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

The line (arc) layers contain the OUTLINE field, coded as follows:

Boundary Type COUNTIESSURVEY_ARC COUNTIES_ARC
State 1 1
County 2 9
Coastline 4 2

Maintenance

MassGIS is maintaining these layers.

Last Updated 11/20/2014

Last updated: November 10, 2014
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