Description: This data layer was created by the Conservation Management Institute, Virginia Tech University for the USFWS National Wetlands Inventory, Region 5. The project area encompasses the eastern end of Long Island Sound, including Fishers Island and the North Fork of Long Island. It includes all coastal embayments and nearshore waters (i.e., to a depth of -15 feet at mean low water) bordering the Sound from Clinton Harbor in the west to the Rhode Island border in the east and including Fishers Island and the North Shore of Long Island from Southold to Orient Point and Plum Island. The study area includes the tidal zone of 18 sub-basins in Connecticut: Little Narragansett Bay, Stonington Harbor, Quiambog Cove, Mystic Harbor, Palmer-West Cove, Mumford Cove, Paquonock River, New London Harbor, Goshen Cove, Jordan Cove, Niantic Bay, Rocky Neck State Park, Old Lyme Shores, Connecticut River, Willard Bay, Westbrook Harbor, Duck Island Roads, and Clinton Harbor, and two areas in New York: Fishers Island and a portion of the North Shore of Long Island. Delineations of 2012 eelgrass beds were completed using 1:20,000 true color aerial photography flown at low tide on August 02, 2012. Earlier photo acquisition was not possible due to unfavorable weather conditions. Field work was conducted by the USFWS Region 5 Southern New England-New York Bight Coastal Program Office on October 02, 2012, prior to Hurricane Sandy. Only one day of field work was conducted due largely to the late season acquisition of imagery and unfavorable weather conditions. Data have been summarized in a technical report: Tiner, R., K. McGuckin, and A. MacLachlan. 2013. 2012 Eelgrass Survey for EasternLong Island Sound, Connecticut and New York. U.S. Fish and Wildlife Service, National Wetlands Inventory Program, Northeast Region, Hadley, MA. National Wetlands Inventory report. 20 pp. including Appendix.
Description: In the summer of 2017, the Nature Conservancy and partner organizations conducted seven survey flights aboard fixed wing aircraft to assess vessel use patterns and composition around the island, establish baselines, and identify areas of eelgrass with greater mooring, anchoring, and prop-scarring pressure. Geotagged photos taken from the survey were used to geolocate boats in Google Earth by inputing the image's location and altitude information and adjusting the view to match coastal features. In addition to incorporating boat characteristics such as boat status, type, and class, boats were identified with a Loc_ID for each boat location and a Boat_ID for each boat to distinuguish identical boats captured in different locations within a survey flight, such as boats underway or found in another area in a later pass. The resulting point layer (KMZ) from each flight was exported from Google Earth and imported and combined in ArcMap. For more information about the survey, see report, An Evaluation of Eelgrass Extent and Vessel Use Patterns Around Fishers Island, New York.
Description: This data layer was created by the Conservation Management Institute, Virginia Tech University for the USFWS National Wetlands Inventory, Region 5. The project area encompasses the eastern end of Long Island Sound, including Fishers Island and the North Fork of Long Island. It includes all coastal embayments and nearshore waters (i.e., to a depth of -15 feet at mean low water) bordering the Sound from Clinton Harbor in the west to the Rhode Island border in the east and including Fishers Island and the North Shore of Long Island from Southold to Orient Point and Plum Island. The study area includes the tidal zone of 18 sub-basins in Connecticut: Little Narragansett Bay, Stonington Harbor, Quiambog Cove, Mystic Harbor, Palmer-West Cove, Mumford Cove, Paquonock River, New London Harbor, Goshen Cove, Jordan Cove, Niantic Bay, Rocky Neck State Park, Old Lyme Shores, Connecticut River, Willard Bay, Westbrook Harbor, Duck Island Roads, and Clinton Harbor, and two areas in New York: Fishers Island and a portion of the North Shore of Long Island. Delineations of 2012 eelgrass beds were completed using 1:20,000 true color aerial photography flown at low tide on August 02, 2012. Earlier photo acquisition was not possible due to unfavorable weather conditions. Field work was conducted by the USFWS Region 5 Southern New England-New York Bight Coastal Program Office on October 02, 2012, prior to Hurricane Sandy. Only one day of field work was conducted due largely to the late season acquisition of imagery and unfavorable weather conditions. Data have been summarized in a technical report: Tiner, R., K. McGuckin, and A. MacLachlan. 2013. 2012 Eelgrass Survey for EasternLong Island Sound, Connecticut and New York. U.S. Fish and Wildlife Service, National Wetlands Inventory Program, Northeast Region, Hadley, MA. National Wetlands Inventory report. 20 pp. including Appendix.
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Field Name: DIG_METHOD Coded Values:[100: Latitude and longitude coordinates], [200: Bearing and distance data], [300: Georeference map and digitize], More
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Description: In the summer of 2017, the Nature Conservancy and partner organizations conducted seven survey flights aboard fixed wing aircraft to assess vessel use patterns and composition around the island, establish baselines, and identify areas of eelgrass with greater mooring, anchoring, and prop-scarring pressure. Geotagged photos taken from the survey were used to geolocate boats in Google Earth by inputing the image's location and altitude information and adjusting the view to match coastal features. In addition to incorporating boat data on status, type, and class, boats were identified with a Loc_ID to identify boat locations and a Boat_ID to distinuguish identical boats captured in different locations within a survey flight, such as boats underway or found in another area in a later pass. The resulting point layer (KMZ) from each flight was exported from Google Earth and imported and combined in ArcMap.
Description: Mapping the distribution and extent of SAV is a critical first step in understanding, managing, and protecting shallow, subtidal estuarine habitats. Geospatial data provide essential baseline information for government agencies, municipalities, and the scientific community. Digital four-band (true color and infra-red) aerial photographs were taken by a photogrammetry vendor on June 28th, 2017. Orthophotography was developed from these photographs which were used as a base map for interpretation and delineation of eelgrass polygons.
Copyright Text: Long Island Sound Study, USFWS, and the University of Rhode Island
Description: In the summer of 2017, the Nature Conservancy and partner organizations conducted seven survey flights aboard fixed wing aircraft to assess vessel use patterns and composition around the island, establish baselines, and identify areas of eelgrass with greater mooring, anchoring, and prop-scarring pressure. Geotagged photos taken from the survey were used to geolocate boats in Google Earth by inputing the image's location and altitude information and adjusting the view to match coastal features. In addition to incorporating boat characteristics such as boat status, type, and class, boats were identified with a Loc_ID for each boat location and a Boat_ID for each boat to distinuguish identical boats captured in different locations within a survey flight, such as boats underway or found in another area in a later pass. The resulting point layer (KMZ) from each flight was exported from Google Earth and imported and combined in ArcMap. For more information about the survey, see report, An Evaluation of Eelgrass Extent and Vessel Use Patterns Around Fishers Island, New York.
Name: Eelgrass Absence Presence Along Dive Transects
Display Field: ABSENCE_PRESENCE
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Geometry Type: esriGeometryPolyline
Description: Absence and presence lines were created from the dive records layer and show areas of continuous eelgrass absence and presence along dive transects where these observations were made. Not all dive sites have transects with absence and presence data. The table is linked to other layers for the 2017 benthic eelgrass survey by the Transect ID and StartDiveRecord_ID (same as the DiveRecord_ID) fields. For more information about the survey, see report, An Evaluation of Eelgrass Extent and Vessel Use Patterns Around Fishers Island, New York.
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Description: In the fall of 2017, the Nature Conservancy conducted an in situ benthic survey of eelgrass around Fishers Island comprising of dives at thirteen sites on different dates. The survey consisted of underwater transects along which divers, equipped with SCUBA gear and a GPS float towed above, swam and recorded plant height, percent cover, eelgrass absence and presence, location of bed edges as well as metrics such as time (for GPS location) and depth. Locations of measurements were drawn from the GPS device, combined with the collected data, and displayed in ArcMap. To aid in data visualization, transect and absence/presence line layers were created from this layer; they are available separately and their tables are linked with the Transect_ID or DiveRecord_ID field. The benthic survey also involved a second component where some locations thought to contain eelgrass were checked by snorkel; the data from these site checks are also available in a separate layer. For more information about the survey, see report, An Evaluation of Eelgrass Extent and Vessel Use Patterns Around Fishers Island, New York.
Description: In the fall of 2017, the Nature Conservancy conducted an in situ benthic survey of eelgrass around Fishers Island comprising of dives at thirteen sites on different dates. The survey consisted of underwater transects along which divers, equipped with SCUBA gear and a GPS float towed above, swam and recorded plant height, percent cover, eelgrass absence and presence, location of bed edges as well as metrics such as time (for GPS location) and depth. Locations of measurements were drawn from the GPS device, combined with the collected data, and displayed in ArcMap. To aid in data visualization, transect and absence/presence line layers were created from this layer; they are available separately and their tables are linked with the Transect_ID or DiveRecord_ID field. The benthic survey also involved a second component where some locations thought to contain eelgrass were checked by snorkel; the data from these site checks are also available in a separate layer. For more information about the survey, see report, An Evaluation of Eelgrass Extent and Vessel Use Patterns Around Fishers Island, New York.
Description: In the fall of 2017, the Nature Conservancy conducted an in situ benthic survey of eelgrass around Fishers Island comprising of dives at thirteen sites on different dates. The survey consisted of underwater transects along which divers, equipped with SCUBA gear and a GPS float towed above, swam and recorded plant height, percent cover, eelgrass absence and presence, location of bed edges as well as metrics such as time (for GPS location) and depth. Locations of measurements were drawn from the GPS device, combined with the collected data, and displayed in ArcMap. To aid in data visualization, transect and absence/presence line layers were created from this layer; they are available separately and their tables are linked with the Transect_ID or DiveRecord_ID field. The benthic survey also involved a second component where some locations thought to contain eelgrass were checked by snorkel; the data from these site checks are also available in a separate layer. For more information about the survey, see report, An Evaluation of Eelgrass Extent and Vessel Use Patterns Around Fishers Island, New York.
Description: Prior to digitizing vessels from the aerial surveys, an ‘area of interest' spatial layer was created to help determine which boats from the aerial survey images to include in the digitization process. This was largely because many of the aerial photographs included boat locations that were well beyond a reasonable distance from Fishers Island to likely have an impact to eelgrass. Being far from the coast also made the location of these boats more difficult to geolocate as there were fewer points of reference. Therefore, we only considered offshore areas up to 40 feet in depth and within 1 mile of Fishers island. While seagrass has not been documented deeper than 24 feet in the area, the generous 40 feet threshold was intended to account for some error that would be involved in geolocating boats, particularly in areas where the depth drops over fairly short distances. In addition, this allowed for a single depth contour area that would also include North Dumpling Island when defining the area of interest. The area of interest layer was created in ArcMap by intersecting areas less than 40 feet in depth and 1 mile in distance away from Fishers Island. The resulting layer included adjacent islets and, for simplification purposes, a few areas with deeper depths inside the resulting polygon layer. For more information about the survey, see report, An Evaluation of Eelgrass Extent and Vessel Use Patterns Around Fishers Island, New York.
Description: Transect lines were created from the Dive Records layer. At each dive site, one or two transects were done and each transect extends from the measured inshore to offshore bed edges, defined as the points along the transects beyond which eelgrass was absent. The exception is for two dive sites where transects were terminated before the offshore edge was reached due to safety reasons such as proximity to breakwaters or boat channels. The table is linked to other layers for the 2017 benthic eelgrass survey by the TransectID field. For more information about the survey, see report, An Evaluation of Eelgrass Extent and Vessel Use Patterns Around Fishers Island, New York.
Description: This data layer was created by the Conservation Management Institute, Virginia Tech University for the USFWS National Wetlands Inventory, Region 5. The project area encompasses the eastern end of Long Island Sound, including Fishers Island and the North Fork of Long Island. It includes all coastal embayments and nearshore waters (i.e., to a depth of -15 feet at mean low water) bordering the Sound from Clinton Harbor in the west to the Rhode Island border in the east and including Fishers Island and the North Shore of Long Island from Southold to Orient Point and Plum Island. The study area includes the tidal zone of 18 sub-basins in Connecticut: Little Narragansett Bay, Stonington Harbor, Quiambog Cove, Mystic Harbor, Palmer-West Cove, Mumford Cove, Paquonock River, New London Harbor, Goshen Cove, Jordan Cove, Niantic Bay, Rocky Neck State Park, Old Lyme Shores, Connecticut River, Willard Bay, Westbrook Harbor, Duck Island Roads, and Clinton Harbor, and two areas in New York: Fishers Island and a portion of the North Shore of Long Island. Delineations of 2012 eelgrass beds were completed using 1:20,000 true color aerial photography flown at low tide on August 02, 2012. Earlier photo acquisition was not possible due to unfavorable weather conditions. Field work was conducted by the USFWS Region 5 Southern New England-New York Bight Coastal Program Office on October 02, 2012, prior to Hurricane Sandy. Only one day of field work was conducted due largely to the late season acquisition of imagery and unfavorable weather conditions. Data have been summarized in a technical report: Tiner, R., K. McGuckin, and A. MacLachlan. 2013. 2012 Eelgrass Survey for EasternLong Island Sound, Connecticut and New York. U.S. Fish and Wildlife Service, National Wetlands Inventory Program, Northeast Region, Hadley, MA. National Wetlands Inventory report. 20 pp. including Appendix.
Description: Mapping the distribution and extent of SAV is a critical first step in understanding, managing, and protecting shallow, subtidal estuarine habitats. Geospatial data provide essential baseline information for government agencies, municipalities, and the scientific community. Digital four-band (true color and infra-red) aerial photographs were taken by a photogrammetry vendor on June 28th, 2017. Orthophotography was developed from these photographs which were used as a base map for interpretation and delineation of eelgrass polygons.
Copyright Text: Long Island Sound Study, USFWS, and the University of Rhode Island
Description: This data layer was created by the Conservation Management Institute, Virginia Tech University for the USFWS National Wetlands Inventory, Region 5. The project area encompasses the eastern end of Long Island Sound, including Fishers Island and the North Fork of Long Island. It includes all coastal embayments and nearshore waters (i.e., to a depth of -15 feet at mean low water) bordering the Sound from Clinton Harbor in the west to the Rhode Island border in the east and including Fishers Island and the North Shore of Long Island from Southold to Orient Point and Plum Island. The study area includes the tidal zone of 18 sub-basins in Connecticut: Little Narragansett Bay, Stonington Harbor, Quiambog Cove, Mystic Harbor, Palmer-West Cove, Mumford Cove, Paquonock River, New London Harbor, Goshen Cove, Jordan Cove, Niantic Bay, Rocky Neck State Park, Old Lyme Shores, Connecticut River, Willard Bay, Westbrook Harbor, Duck Island Roads, and Clinton Harbor, and two areas in New York: Fishers Island and a portion of the North Shore of Long Island. Delineations of 2012 eelgrass beds were completed using 1:20,000 true color aerial photography flown at low tide on August 02, 2012. Earlier photo acquisition was not possible due to unfavorable weather conditions. Field work was conducted by the USFWS Region 5 Southern New England-New York Bight Coastal Program Office on October 02, 2012, prior to Hurricane Sandy. Only one day of field work was conducted due largely to the late season acquisition of imagery and unfavorable weather conditions. Data have been summarized in a technical report: Tiner, R., K. McGuckin, and A. MacLachlan. 2013. 2012 Eelgrass Survey for EasternLong Island Sound, Connecticut and New York. U.S. Fish and Wildlife Service, National Wetlands Inventory Program, Northeast Region, Hadley, MA. National Wetlands Inventory report. 20 pp. including Appendix.
Description: This data layer was created by the Conservation Management Institute, Virginia Tech University for the USFWS National Wetlands Inventory, Region 5. The project area encompasses the eastern end of Long Island Sound, including Fishers Island and the North Fork of Long Island. It includes all coastal embayments and nearshore waters (i.e., to a depth of -15 feet at mean low water) bordering the Sound from Clinton Harbor in the west to the Rhode Island border in the east and including Fishers Island and the North Shore of Long Island from Southold to Orient Point and Plum Island. The study area includes the tidal zone of 18 sub-basins in Connecticut: Little Narragansett Bay, Stonington Harbor, Quiambog Cove, Mystic Harbor, Palmer-West Cove, Mumford Cove, Paquonock River, New London Harbor, Goshen Cove, Jordan Cove, Niantic Bay, Rocky Neck State Park, Old Lyme Shores, Connecticut River, Willard Bay, Westbrook Harbor, Duck Island Roads, and Clinton Harbor, and two areas in New York: Fishers Island and a portion of the North Shore of Long Island. Delineations of 2012 eelgrass beds were completed using 1:20,000 true color aerial photography flown at low tide on August 02, 2012. Earlier photo acquisition was not possible due to unfavorable weather conditions. Field work was conducted by the USFWS Region 5 Southern New England-New York Bight Coastal Program Office on October 02, 2012, prior to Hurricane Sandy. Only one day of field work was conducted due largely to the late season acquisition of imagery and unfavorable weather conditions. Data have been summarized in a technical report: Tiner, R., K. McGuckin, and A. MacLachlan. 2013. 2012 Eelgrass Survey for EasternLong Island Sound, Connecticut and New York. U.S. Fish and Wildlife Service, National Wetlands Inventory Program, Northeast Region, Hadley, MA. National Wetlands Inventory report. 20 pp. including Appendix.
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Description: Some areas around Fishers Island thought to have eelgrass but not shown in the U.S. Fish and Wildlife Service LIS Eelgrass Survey (2012) were checked by snorkel. Site checks consisted of three surface dives within 50 meters of each point to determine eelgrass absence or presence. For more information about the survey, see report, An Evaluation of Eelgrass Extent and Vessel Use Patterns Around Fishers Island, New York.
Description: This data layer was created by the Conservation Management Institute, Virginia Tech University for the USFWS National Wetlands Inventory, Region 5. The project area encompasses the eastern end of Long Island Sound, including Fishers Island and the North Fork of Long Island. It includes all coastal embayments and nearshore waters (i.e., to a depth of -15 feet at mean low water) bordering the Sound from Clinton Harbor in the west to the Rhode Island border in the east and including Fishers Island and the North Shore of Long Island from Southold to Orient Point and Plum Island. The study area includes the tidal zone of 18 sub-basins in Connecticut: Little Narragansett Bay, Stonington Harbor, Quiambog Cove, Mystic Harbor, Palmer-West Cove, Mumford Cove, Paquonock River, New London Harbor, Goshen Cove, Jordan Cove, Niantic Bay, Rocky Neck State Park, Old Lyme Shores, Connecticut River, Willard Bay, Westbrook Harbor, Duck Island Roads, and Clinton Harbor, and two areas in New York: Fishers Island and a portion of the North Shore of Long Island. Delineations of 2012 eelgrass beds were completed using 1:20,000 true color aerial photography flown at low tide on August 02, 2012. Earlier photo acquisition was not possible due to unfavorable weather conditions. Field work was conducted by the USFWS Region 5 Southern New England-New York Bight Coastal Program Office on October 02, 2012, prior to Hurricane Sandy. Only one day of field work was conducted due largely to the late season acquisition of imagery and unfavorable weather conditions. Data have been summarized in a technical report: Tiner, R., K. McGuckin, and A. MacLachlan. 2013. 2012 Eelgrass Survey for EasternLong Island Sound, Connecticut and New York. U.S. Fish and Wildlife Service, National Wetlands Inventory Program, Northeast Region, Hadley, MA. National Wetlands Inventory report. 20 pp. including Appendix.
Description: Mapping the distribution and extent of SAV is a critical first step in understanding, managing, and protecting shallow, subtidal estuarine habitats. Geospatial data provide essential baseline information for government agencies, municipalities, and the scientific community. Digital four-band (true color and infra-red) aerial photographs were taken by a photogrammetry vendor on June 28th, 2017. Orthophotography was developed from these photographs which were used as a base map for interpretation and delineation of eelgrass polygons.
Copyright Text: Long Island Sound Study, USFWS, and the University of Rhode Island