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<div>This tile service is derived from a digital raster graphic of the historical 15-minute USGS topographic quadrangle maps of coastal towns in
Massachusetts. These quadrangles were mosaicked together to create a single data layer of the coast of Massachusetts and a large portion of the southeastern area of the state.</div><div><br /></div><div>The <a href='https://www.mass.gov/orgs/massachusetts-office-of-coastal-zone-management'>Massachusetts Office of
Coastal Zone Management</a> (CZM) obtained the map images from
the <a href='http://hcl.harvard.edu/libraries/maps/'>Harvard
Map Collection</a>. The maps were produced in the late 1890s
and early 20th century at a scale of 1:62,500 or 1:63,360 and
are commonly known as 15-minute quadrangle maps because each map
covers a four-sided area of 15 minutes of latitude and 15
minutes of longitude.</div>
[]
{'title': 'USGS Historical Coastal Topographic Map Image', 'author': 'MassGIS', 'comments': '', 'subject': 'Digital raster graphic of the historical 15-minute USGS topographic quadrangle maps of coastal towns in Massachusetts. ', 'category': '', 'keywords': 'USGS, Historical, coastal, Topographic, Massachusetts, MassGIS', 'credits': 'USGS, MassGIS', 'Title': '', 'Author': '', 'Comments': '', 'Subject': '', 'Category': '', 'AntialiasingMode': 'Best', 'TextAntialiasingMode': 'Force', 'Keywords': ''}
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