MassGIS Data: Coastal Barrier Resource Units

April 1997

The U.S. Fish and Wildlife Service designated coastal barrier resource units data layer was compiled by the Resource Mapping Project staff at the University of Massachusetts, Amherst for the Massachusetts Coastal Zone Management Program.

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Overview

The U.S. Fish and Wildlife Service designated coastal barrier resource units data layer was compiled by the Resource Mapping Project staff at the University of Massachusetts, Amherst for the Massachusetts Coastal Zone Management Program. The designations show barrier beaches and the associated aquatic habitat. Two layers store the data: CBRS_ARC and CBRS_POLY.

Production

Interpreted 1:25,000 paper USGS Topographic Maps from the U.S. Fish and Wildlife Service.

A polygon coverage was built by digitizing interpreted feature boundaries not including the shoreline. The shoreline used in this coverage is from the MassGIS 1:25,000 source. The automation of this data was conducted in May 1993. Minor changes to the delineations have recently been made and published in the Federal Register. Updated delineations will be available when the U.S. Fish and Wildlife Service provides revised documents.

Attributes

The arc layer contains the following items:

Item Name	Width	Type	Description
BOUNDARY	4	B	Numeric code matching feature type
FEATURE	16	C	Identifies inland, shoreline or marine boundary

The polygon layer contains the following items:

Item Name	Width	Type	Description
POLYID	4	B	1 = Land 2 = Water 3 = Non-MA Land 11 to 96 = Numeric code to identify unique features. <11 to 96>999 = Aquatic component to designation.
CBRSNAME	8	C	USFWS alpha-numeric code for each unit or a "Marine" label for marine components.

Maintenance

MCZM maintains the data.