This coverage shows all mapped tidal wetlands across the state of Connecticut. The mapping has been compiled from two sources; the 1994 Ramsar Tidal Wetlands Mapping and the 1995 OLISP Tidal Wetlands Mapping, both produced by the State of Connecticut, Department of Long Island Sound Programs. The tidal wetland boundaries are not regulatory boundaries but should be interpreted as a guide to the location of tidal wetlands throughout the state.

The Ramsar tidal wetlands mapping extends south from Cromwell Connecticut to the mouth of the Connecticut River. 1990, 1:12,000 scale, color infrared aerial photographs were used to identify the tidal wetland boundaries. These boundaries were mapped and transposed onto a topographic map base and digitized.

The 1995 OLISP Tidal Wetlands Mapping covers all the tidal wetlands in Connecticut that were not mapped as part of the Ramsar project. The mapping was done using 1995, 1:12,000 scale, color infrared aerial photographs and 1990/91 black and white Digital Orthophotographs. Tidal wetlands were identified on the 1995 aerial photographs and then digitized in ArcEdit using the digital orthophoto as the map base. This mapping process has resulted in a very geometrically accurate map but one that does not align perfectly with the older topographic base data such as the RAMSAR mapping and much of the DEP library information such as roads and hydrography. Boundary lines are as precise as the source information permit.

NOTES: With the exception of the Connecticut River data both Ramsar and other mapping, coverage polygons have not been thoroughly verified and are still considered DRAFT quality. The tidal wetland polygons north of the Ramsar Data, on the Connecticut River, were checked by Ken Metzler of the Environmental and Geographic Information Center.

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