20191218 14165800 1.0 TRUE Created by converting NOAA CUSP shoreline features to a polygon for Long Island Sound. Required a few edits using ArcGIS topology functions and closure of openings on rivers and at the ends of the sound. Focused on water features connected to or at the same elevation as the main body of water in LIS (no inland lakes). LIS Long Island Sound Mask Long Island Sound water polygon created to mask stray LIDAR elevation values off shore of the CT coast. NOAA and The University of Connecticut Cooperative Extension System LISWaterMask 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