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MassGIS Data: Offshore Town Boundaries

August 1996
This datalayer represents Offshore city and town boundaries for Massachusetts.
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OVERVIEW

This datalayer represents Offshore city and town boundaries for Massachusetts. The data are derived from 1:80,000 NOAA Charts and 1:24,000 USGS quadrangle maps of various dates. The coastline is the same as in the TOWNS_POLY and OUTLINE _POLY layers (1:100,000 USGS).

In ArcSDE are two layers - OFFSH80K_POLY and OFFSH80K_ARC.

Sample of Offshore Town Boundaries


ATTRIBUTES

The OFFSH80K_POLY attribute table contains the following items:
SEA 0 and 1
TOWN_ID Unique municipal identifier (from 1-351 Town ID List)

The OFFSH80K_ARC attribute table contains the following items:
SOURCE Source of arc and person digitizing. Arc source is either NOAA 1:80,000 charts or USGS 1:24,000 topographic quadrangle maps.
TYPE Numeric code for source

Codes are as follows:
Type Source
0 UNKNOWN
1 V. ANTIL, DFWELE, NOAA CHARTS
2 V. ANTIL, DFWELE, USGS 1:24,000 TOPO MAPS
3 D. WEAVER, MassGIS, 1:24,000 USGS TOPO MAPS
4 N. MACGAFFEY, CZM, USGS 1:24,000 TOPO MAPS
5 MISC SOURCES

 

MAINTENANCE

MassGIS is maintaining the datalayer. No updates are planned. For more spatially-accurate coastline data see the Towns from Survey Points layer.

 

Last Updated 9/30/2008

Items

Contributor
Modified Date
2018-03-29
Release Date
2018-01-03
Identifier
9fa0f49d-c946-47e2-9c05-2e4fa3a35b28
Spatial / Geographical Coverage Location
Massachusetts
License
Author
MassGIS
Contact Name
MassGIS
Contact Email
Public Access Level
Public
Data Quality
False
Content Type
Language
English (United States)