EarthWorks Geospatial Catalog

Massachusetts (Hydrography, 2003)

Description
The MassGIS 1:25,000 Hydrography datalayer represents hydrographic (water-related) features, including surface water (lakes, ponds, reservoirs), wetlands, bogs, flats, rivers, streams, and others. The layer is a hybrid of data based on USGS Digital Line Graphs (DLGs), scanned mylar separates obtained from the USGS, and digitized hydrographic features from paper USGS 1:25,000 Topographic Quadrangle maps. This layer had previously contained features from the USGS 1:100,000 hydrography; these have been replaced with features from the scanned mylars.IMPORTANT: Please note that because this file is comprised of USGS tiles, the boundaries of the file do not correlate exactly with the border of Massachusetts.
Publisher
Massachusetts Office of Geographic and Environmental Information (MassGIS)
Year
1991
Held by
MIT
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