OVERVIEW

These polygon and line datalayers are available that represent the outline (boundary) of the Commonwealth of Massachusetts:

• OUTLINE_POLY and OUTLINE_ARC - contains the state outline with a 1:100,000 coastline
• OUTLINE25K_POLY and  OUTLINE25K_ARC- contains the state outline with a 1:25,000 coastline

For the both layers, MassGIS digitized 1:25,000 linework from U.S. Geological Survey mylar map sheets for land boundaries. For the OUTLINE layer, a 1:100,000 coastline was extracted from USGS Digital Line Graphs. For OUTLINE25K, the coastline from the 1:25,000 Hydrography layer was used. All processing was done in ARC/INFO.

The OUTLINE_POLY and OUTLINE25K_POLY attribute tables contains this item:

AREA_ACRES

Polygon area in acres

The OUTLINE_ARC attribute table contains this item:

SYMBOL

1 = Inland boundary 4 = Coastline (100k)

The OUTLINE25K_ARC attribute table contains these items:

COAST		Y = Coastline (25k) N = Inland boundary
SYMBOL		0 = Coastline (25k) 5 = Inland boundary

MassGIS is maintaining these layers.

Last Updated 1/14/2008
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