A cartographic representation of the body of water separating Long Island, New York, from Connecticut and a portion of Rhode Island. This representation typically delineates coastlines, water depths (bathymetry), navigational channels, prominent landmarks, and political boundaries relevant to the area. For example, such a representation might show the varying depths from the shores of Northport, New York, to the Connecticut coastline, highlighting the main shipping channels used by commercial vessels.
Such depictions serve several critical functions. They are essential for safe navigation, enabling mariners to plan routes and avoid hazards. Furthermore, these graphical displays are valuable tools for scientific research, supporting studies of marine ecosystems, water quality, and coastal erosion. Historically, accurate hydrographic surveys were paramount for trade and defense, influencing settlement patterns and resource management in the region.