Identification_Information: Citation: Citation_Information: Originator: National Oceanic and Atmospheric Administration Originator: U.S. Geological Survey Publication_Date: 2011 Title: ELISCOMB_UTM: 4-m Grid of the Combined Multibeam and LIDAR Bathymetry Generated from National Oceanic and Atmospheric Administration (NOAA) Surveys H11224, H11225, H11250, H11251, H11252, H11361, H11441, H11442, H11445, H11446, H11997, H11999, H12012, and H12013 Offshore in Eastern Long Island Sound and Westernmost Block Island Sound (UTM Zone 18, NAD83) Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2011-1003 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2011/1003/data/bathy/grids/geo/eliscomb_utm.zip Online_Linkage: http://pubs.usgs.gov/of/2011/1003/html/catalog.html Larger_Work_Citation: Citation_Information: Originator: L.J. Poppe Originator: W.W. Danforth Originator: K.Y. McMullen Originator: C.E. Parker Originator: E.F. Doran Publication_Date: 2011 Title: Combined Multibeam and LIDAR Bathymetry Data from Eastern Long Island Sound and Westernmost Block Island Sound - A Regional Perspective Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2011-1003 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2011/1003/ Description: Abstract: The USGS, in cooperation with NOAA and the Connecticut DEP, is producing detailed maps of the seafloor in Long Island Sound. The current phase of this cooperative research program is directed toward analyzing how bathymetric relief relates to the distribution of sedimentary environments and benthic communities. As part of this program, digital terrain models (DTMs) from bathymetry collected as part of NOAA's hydrographic charting activities are converted into ESRI raster grids and imagery (primarily of 2-m resolution), verified with bottom sampling and photography, and used to produce interpretations of seabed geology and hydrodynamic processes. Although each of the 18 completed surveys, ranging in area from 12 to 293 square kilometers, individually provides important benthic environmental information, many applications require a geographically broader perspective. For example, the usefulness of individual surveys is limited for the planning and construction of cross-Sound infrastructure, such as cables and pipelines, or for the testing of regional circulation models. To address this need, we integrated 12 multibeam and 2 LIDAR (Light Detection and Ranging) contiguous bathymetric DTMs into one dataset that covers much of eastern Long Island Sound. The new dataset is adjusted to mean lower low water, is provided in UTM Zone 18 NAD83 and geographic WGS84 projections, and is gridded to 4-m resolution. This resolution is adequate for seafloor-feature and process interpretation, but small enough to be queried and manipulated with standard GIS programs and to allow for future growth. Natural features visible in the grid include exposed bedrock outcrops, boulder lag deposits of submerged moraines, sand-wave fields, and scour depressions that reflect the strength of the oscillating tidal currents. Bedform asymmetry allows interpretations of net sediment transport. Anthropogenic artifacts visible in the bathymetric data include a dredged channel, shipwrecks, dredge spoils, mooring anchors, prop-scour depressions, buried cables, and bridge footings. Together the merged data reveal a larger, more continuous perspective of bathymetric topography than previously available, providing a fundamental framework for research and resource management activities in this major east-coast estuary. Purpose: To release a 4-m grid of the combined multibeam and LIDAR bathymetry generated from NOAA surveys H11224, H11225, H11250, H11251, H11252, H11361, H11441, H11442, H11445, H11446, H11997, H11999, H12012, and H12013 offshore in eastern Long Island Sound and westernmost Block Island Sound in UTM Zone 18, NAD83. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20031006 Ending_Date: 20090517 Currentness_Reference: ground condition (See the source citation in the lineage section for individual component's specific dates.) Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -72.666572 East_Bounding_Coordinate: -71.975125 North_Bounding_Coordinate: 41.391500 South_Bounding_Coordinate: 41.079369 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: multibeam bathymetry Theme_Keyword: LIDAR Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: WHCMSC Theme_Keyword: RESON 8101 Theme_Keyword: NOAA survey H11441 Theme_Keyword: H11441 Theme_Keyword: National Oceanic and Atmospheric Administration Theme_Keyword: NOAA Theme_Keyword: grid Theme_Keyword: Open-File Report 2011-1003 Theme_Keyword: ArcRaster grid Theme_Keyword: OFR 2011-1003 Theme_Keyword: RESON 8125 Theme_Keyword: NOAA survey H11224 Theme_Keyword: H11224 Theme_Keyword: bathymetry Theme_Keyword: Connecticut Department of Environmental Protection Theme_Keyword: CT DEP Theme_Keyword: NOAA survey H11442 Theme_Keyword: H11442 Theme_Keyword: NOAA survey H11225 Theme_Keyword: H11225 Theme_Keyword: NOAA survey H11250 Theme_Keyword: NOAA survey H11251 Theme_Keyword: NOAA survey H11252 Theme_Keyword: NOAA survey H11361 Theme_Keyword: NOAA survey H11445 Theme_Keyword: NOAA survey H11446 Theme_Keyword: NOAA survey H11997 Theme_Keyword: NOAA survey H11999 Theme_Keyword: NOAA survey H12012 Theme_Keyword: NOAA survey H12013 Theme_Keyword: H11250 Theme_Keyword: H11251 Theme_Keyword: H11252 Theme_Keyword: H11361 Theme_Keyword: H11445 Theme_Keyword: H11446 Theme_Keyword: H11997 Theme_Keyword: H11999 Theme_Keyword: H12012 Theme_Keyword: H12013 Theme_Keyword: MBES Theme_Keyword: Simrad EM1002 Theme_Keyword: RESON 7125 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans and estuaries Theme_Keyword: oceans and coastal Theme_Keyword: elevation Theme_Keyword: oceans Place: Place_Keyword_Thesaurus: General Place_Keyword: Connecticut Place_Keyword: New London Place_Keyword: U.S. East Coast Place_Keyword: United States Place_Keyword: North America Place_Keyword: Atlantic Ocean Place_Keyword: Fishers Island Place_Keyword: Groton Place_Keyword: Long Island Sound Place_Keyword: Avery Point Place_Keyword: Fishers Island Sound Place_Keyword: Niantic Place_Keyword: Niantic Bay Place_Keyword: Black Point Place_Keyword: Giants neck Place_Keyword: Twotree Island Place_Keyword: The Race Place_Keyword: Orient Point Place_Keyword: Plum Island Place_Keyword: Rocky Point Place_Keyword: Six Mile Reef Place_Keyword: Long Sand Shoal Place_Keyword: Connecticut River Place_Keyword: Old Saybrook Access_Constraints: None Use_Constraints: Data are not to be used for navigation purposes. Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the National Oceanic and Atmospheric Administration (NOAA) and U.S. Geological Survey (USGS) as the originators of this information. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Larry Poppe Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 x2314 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: lpoppe@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2011/1003/data/bathy/grids/utm/eliscomb_utm.gif Browse_Graphic_File_Description: Thumbnail image showing the combined 4-m gridded multibeam and LIDAR bathymetry collected during NOAA surveys H11224, H11225, H11250, H11251, H11252, H11361, H11441, H11442, H11445, H11446, H11997, H11999, H12012, and H12013 offshore in eastern Long Island Sound and westernmost Block Island Sound in UTM Zone 18, NAD83 Browse_Graphic_File_Type: GIF Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500 Cross_Reference: Citation_Information: Originator: Emily B. Christman Publication_Date: 2005 Title: H11441 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11441 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11441/DR/H11441.pdf Cross_Reference: Citation_Information: Originator: Darren Stephenson Publication_Date: 2004 Title: H11224 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11224 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11224/DR/H11224.pdf Cross_Reference: Citation_Information: Originator: Poppe, L.J. Originator: Ackerman, S.D. Originator: Doran, E.F. Originator: Beaver, A.J. Originator: Crocker, J.M. Originator: Schattgen, P.T. Publication_Date: 2006 Title: Interpolation of reconnaissance multibeam bathymetry from north-central Long Island Sound Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1145 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2005/1145/ Cross_Reference: Citation_Information: Originator: Emily B. Christman Publication_Date: 2005 Title: H11442 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11442 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11442/DR/H11442.pdf Cross_Reference: Citation_Information: Originator: Darren Stephenson Publication_Date: 2004 Title: H11225 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11225 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11225/DR/H11225.pdf Cross_Reference: Citation_Information: Originator: Donald W. Haines Publication_Date: 2003 Title: H11250 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11250 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11250/DR/H11250.pdf Cross_Reference: Citation_Information: Originator: P. Tod Schattgen Publication_Date: 2008 Title: H11251 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11251 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11251/DR/H11251.pdf Cross_Reference: Citation_Information: Originator: Emily B. Christman Publication_Date: 2004 Title: H11252 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11252 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11252/DR/H11252.pdf Cross_Reference: Citation_Information: Originator: Emily B. Christman Publication_Date: 2004 Title: H11361 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11361 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11361/DR/H11361.pdf Cross_Reference: Citation_Information: Originator: P. Tod Schattgen Publication_Date: 2008 Title: H11445 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11445 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11445/DR/H11445.pdf Cross_Reference: Citation_Information: Originator: P. Tod Schattgen Publication_Date: 2008 Title: H11446 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11446 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11446/DR/H11446.pdf Cross_Reference: Citation_Information: Originator: P. Tod Schattgen Publication_Date: 2008 Title: H11997 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11997 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11997/DR/H11997.pdf Cross_Reference: Citation_Information: Originator: P. Tod Schattgen Publication_Date: 2008 Title: H11999 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H11999 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H10001-H12000/H11999/DR/H11999.pdf Cross_Reference: Citation_Information: Originator: P. Tod Schattgen Publication_Date: 2009 Title: H12012 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H12012 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H12001-H14000/H12012/DR/H12012.pdf Cross_Reference: Citation_Information: Originator: P. Tod Schattgen Publication_Date: 2009 Title: H12013 Edition: 1.0 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Descriptive Report Issue_Identification: H12013 Publication_Information: Publication_Place: Atlantic Hydrographic Branch, Norfolk, VA Publisher: National Ocean Survey, National Oceanic and Atmospheric Administration Online_Linkage: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H12001-H14000/H12013/DR/H12013.pdf Cross_Reference: Citation_Information: Originator: Poppe, L.J. Originator: Danforth, W.W. Originator: McMullen, K.Y. Originator: Parker, C.E. Originator: Lewit, P.G. Originator: Doran, E.F. Publication_Date: 2010 Title: Integrated multibeam and LIDAR bathymetry data offshore of New London and Niantic, Connecticut Edition: 1.0 Geospatial_Data_Presentation_Form: GIS data report Series_Information: Series_Name: Open-File Report Issue_Identification: 2009-1231 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Other_Citation_Details: 1 CD-ROM Online_Linkage: http://pubs.usgs.gov/of/2009/1231/ Data_Quality_Information: Logical_Consistency_Report: No additional checks for consistency were performed on this data. Completeness_Report: All collected data were processed and used to produce this dataset. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal position of the launches acquiring multibeam bathymetry were determined using GPS corrected by U.S. Coast Guard differential GPS beacon stations at Moriches, NY, Sandy Hook, NJ, and Acushnet, MA. Real-time positioning during LIDAR acquisition was obtained by an Ashtech GG24 GPS receiver combined with Thales GeoSolutions Wide Area DGPS. Original horizontal resolution of the MBES data was 0.5 - 2 m; original cell size of the gridded LIDAR data was primarily 4 m. The final CARIS combined base surfaces for the MBES data were produced at a 2-m cell size; final cell size of the gridded LIDAR data was 4 m. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Attitude of the launches (e.g. pitch, roll, and heave) acquiring multibeam bathymetry were monitored by an Applanix TSS POS/MV 320 Version 3 GPS aided navigation system. Real-time positioning during LIDAR acquisition was obtained by an Ashtech GG24 GPS receiver combined with Thales GeoSolutions Wide Area DGPS. Ashtech Z12 GPS receivers, provided as part of the Airborne System and Ground Systems, also logged GPS data on the aircraft and at a locally established base station to provide post processed KGPS position solutions. Received infrared laser energy, supplemented by an Altitude Heading Reference System (AHRS) inertial height reference and kinematic GPS, determined the height of the aircraft. Verified water levels are based on NWLON stations 8461490, New London, CT and 8465705, New Haven, CT. The vertical resolution of the multibeam data is approximately 0.5% of the water depth. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Emily B. Christman Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11441 bathymetry Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20050427 Ending_Date: 20050522 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: Darren Stephenson Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11224 bathymetry Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20040120 Ending_Date: 20040305 Source_Currentness_Reference: ground condition Source_Contribution: Original processed LIDAR bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: Emily B. Christman Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11442 bathymetry Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20050418 Ending_Date: 20050506 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: Darren Stephenson Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11225 bathymetry Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20040120 Ending_Date: 20040305 Source_Currentness_Reference: ground condition Source_Contribution: Original processed LIDAR bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: Donald W. Haines Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11250 bathymetry Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20031006 Ending_Date: 20031101 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: P. Tod Schattgen Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11251 Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20081007 Ending_Date: 20081027 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: Emily B. Christman Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11252 Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20041024 Ending_Date: 20041115 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: Emily B. Christman Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11361 Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20041011 Ending_Date: 20041115 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: P. Tod Schattgen Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11445 Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20080916 Ending_Date: 20081001 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: P. Tod Schattgen Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11446 Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20080728 Ending_Date: 20081021 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: P. Tod Schattgen Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11997 Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20080915 Ending_Date: 20081029 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: P. Tod Schattgen Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H11999 Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20081002 Ending_Date: 20081029 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: P. Tod Schattgen Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H12012 Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20090418 Ending_Date: 20090430 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Source_Information: Source_Citation: Citation_Information: Originator: P. Tod Schattgen Originator: Atlantic Hydrographic Branch, National Ocean Survey, National Oceanic and Atmospheric Administration, Norfolk, VA Publication_Date: Unpublished Material Title: H12013 Geospatial_Data_Presentation_Form: raster digital data Type_of_Source_Media: computer hard drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20090419 Ending_Date: 20090517 Source_Currentness_Reference: ground condition Source_Contribution: Original processed multibeam bathymetric data. Process_Step: Process_Description: The NOAA Ship Thomas Jefferson, and two 8.5-m aluminum Jensen launches deployed from the ship, were used to acquire the multibeam echosounder (MBES) bathymetric data between October 2003 and May 2009 for surveys H11250, H11251, H11252, H11361, H11441, H11442 H11445, H11446, H11997, H11999, H12012, and H12013. Aboard the launches, the MBES data were collected with hull-mounted RESON SeaBat 240-kHz 8101 and 455-kHz 8125 shallow-water systems. These systems measure two-way sound travel time across a 150-degree swath and 120-degree swath, respectively. The SeaBat 8101 has 101 beams at a 1.5-degree beam spacing. The SeaBat 8125 has 240 beams with a cross-track beam width of 0.5 degrees at nadir. Aboard the Thomas Jefferson, MBES data for surveys H11250, H11252, and H11361 were collected with a SIMRAD EM1002 system; later surveys were collected with a RESON 7125 system. Original horizontal resolution of the MBES data was 0.5 to 2 m, depending on survey and water depth; vertical resolution of the MBES data is about 0.5% of the water depth. The bathymetric data were acquired in XTF (extended Triton data format) and processed by NOAA using CARIS HIPS (Hydrographic Image Processing System) software for quality control, to incorporate sound velocity and tidal corrections, and to produce the continuous digital terrain model. Navigation was by TSS POS/MV 320 differential GPS-assisted inertial navigation systems; the differential GPS beacons used were from Moriches, New York, and Sandy Hook, New Jersey. HYPACK MAX was used for acquisition line navigation. Sound velocity corrections were derived using frequent SEACAT CTD (conductivity-temperature-depth) profiles. Typically, a CTD cast was conducted every four to six hours of MBES acquisition. Tidal zone corrections were calculated from data acquired from National Water Level Observation stations at New London, Connecticut, New Haven, Connecticut, and Montauk, New York. Vertical datum is mean lower low water. Individuals interested in detail descriptions of the MBES acquisition and processing should consult the descriptive reports. Eleven reconnaissance cruises were conducted aboard a leased lobster boat to monitor water clarity prior to commencement of airborne LIDAR operations of surveys H11224 and H11225. These cruises, which utilized Secchi disks to determine water clarity, were conducted between the Connecticut River and Fishers Island during May 9, 2003 and January 11, 2004, when water clarity was deemed adequate. The LIDAR (light detection and ranging) data were acquired by Tenix LADS, Inc. during January 25 - March 3, 2004 with a LADS Mk II system. Airborne survey operations were conducted aboard a Dash 8-202 series aircraft with a Nd:YAG laser at heights between 1,200 and 2,200 feet, at ground speeds between 140 and 210 knots, and at 4x4 and 3x3-m laser-spot spacings. Green laser pulses were scanned beneath the aircraft in a rectilinear pattern. The returned green-laser energy reflected from the sea surface and seafloor were captured and digitally recorded. Received infrared laser energy, supplemented by an Altitude Heading Reference System (AHRS) inertial height reference and kinematic GPS, determined the height of the aircraft. Real-time positioning was provided by WADGPS (wide area differential global positioning system). Acquired data were processed with CARIS HIPS. Individuals interested in detail descriptions of the MBES and LIDAR acquisition and processing should consult the descriptive reports. Vertical datum is mean lower low water; X and Y units are meters; UTM Zone 18, NAD83. Process_Date: Unknown Source_Produced_Citation_Abbreviation: H11224 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11225 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11441 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11442 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11250 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11251 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11252 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11361 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11445 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11446 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11997 CARIS HIPS database Source_Produced_Citation_Abbreviation: H11999 CARIS HIPS database Source_Produced_Citation_Abbreviation: H12012 CARIS HIPS database Source_Produced_Citation_Abbreviation: H12013 CARIS HIPS database Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Oceanic and Atmospheric Administration Contact_Person: Castle Eugene Parker Contact_Position: Hydrographer Contact_Address: Address_Type: mailing address Address: 439 West York Street City: Norfolk State_or_Province: VA Postal_Code: 23510 Country: USA Contact_Voice_Telephone: 757-441-6746 Contact_Electronic_Mail_Address: castle.e.parker@noaa.gov Process_Step: Process_Description: The field sheets from the surveys (average depths, not the shoal based field sheets) were read back into CARIS HIPS/SIPS software version 7.0. Using the Base Surface -> Combine command within HIPS, all of the source CARIS base surfaces were combined into a master BASE surface (eliscomb) having a 4 meter grid resolution. Source_Used_Citation_Abbreviation: H11224 CARIS HIPS database Source_Used_Citation_Abbreviation: H11225 CARIS HIPS database Source_Used_Citation_Abbreviation: H11250 CARIS HIPS database Source_Used_Citation_Abbreviation: H11251 CARIS HIPS database Source_Used_Citation_Abbreviation: H11252 CARIS HIPS database Source_Used_Citation_Abbreviation: H11361 CARIS HIPS database Source_Used_Citation_Abbreviation: H11441 CARIS HIPS database Source_Used_Citation_Abbreviation: H11442 CARIS HIPS database Source_Used_Citation_Abbreviation: H11445 CARIS HIPS database Source_Used_Citation_Abbreviation: H11446 CARIS HIPS database Source_Used_Citation_Abbreviation: H11997 CARIS HIPS database Source_Used_Citation_Abbreviation: H11999 CARIS HIPS database Source_Used_Citation_Abbreviation: H12012 CARIS HIPS database Source_Used_Citation_Abbreviation: H12013 CARIS HIPS database Process_Date: 2010 Source_Produced_Citation_Abbreviation: eliscomb.csar Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: The combined base surface was exported from CARIS as a Bathymetric Attributed Grid (BAG) file. See http://www.opennavsurf.org/papers/ons_fsd.pdf for a description of the BAG format. Source_Used_Citation_Abbreviation: eliscomb.csar Process_Date: 2010 Source_Produced_Citation_Abbreviation: eliscomb.bag Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: USA Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: The BAG surface was imported into Fledermaus v7.2 to make equivalent digital terrain model (DTM) files. The floating point format for each sounding depth point is preserved during data import. Additionally, the BAG surface was imported into Fledermaus as "gridded data", therefore re-gridding of data did not occur during the import process and thus preserved the original resolution of the CARIS base surface. The DTM was then exported as an ESRI ASCII raster file. Source_Used_Citation_Abbreviation: eliscomb.bag Process_Date: 2010 Source_Produced_Citation_Abbreviation: eliscomb.asc Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: The ESRI ASCII raster file was then converted into raster within ArcToolbox v9.3 using the ASCII to Raster conversion tool. Source_Used_Citation_Abbreviation: eliscomb.asc Process_Date: 2010 Source_Produced_Citation_Abbreviation: eliscomb_utm Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Bill Danforth Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: USA Contact_Voice_Telephone: 508-548-8700 x2274 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 8233 Column_Count: 14248 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 18 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -75.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 4.000000 Ordinate_Resolution: 4.000000 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Mean lower low water Depth_Resolution: 0.1 Depth_Distance_Units: meters Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: A 4-m grid of the combined bathymetry data from NOAA surveys H11224, H11225, H11250, H11251, H11252, H11361, H11441, H11442, H11445, H11446, H11997, H11999, H12012, and H12013 offshore in eastern Long Island Sound and westernmost Block Island Sound in the UTM Zone 18, NAD83 coordinate system. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Larry Poppe Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 x2314 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: lpoppe@usgs.gov Resource_Description: Downloadable Data Distribution_Liability: Neither the U.S. Government, the Department of the Interior, nor the USGS, nor the National Oceanic and Atmospheric Administration (NOAA), nor the Connecticut Department of Environmental Protection (CT DEP) nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS, NOAA, or the CT DEP in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCG Format_Specification: ESRI ArcRaster Grid Format_Information_Content: One file (eliscomb_utm.zip) containing the ArcGIS grid file components, browse graphic and metadata. File_Decompression_Technique: zip archive Transfer_Size: 75.6 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2011/1003/data/bathy/grids/utm/eliscomb_utm.zip Network_Resource_Name: http://pubs.usgs.gov/of/2011/1003/html/catalog.html Access_Instructions: Data are downloadable via the World Wide Web (WWW). Offline_Option: Offline_Media: DVD-ROM Recording_Capacity: Recording_Density: 4.7 Recording_Density_Units: Gbytes Recording_Format: UDF Fees: None Technical_Prerequisites: The user must have a program capable of reading the ESRI grid data format. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware. Available_Time_Period: Time_Period_Information: Single_Date/Time: Calendar_Date: 2011 Metadata_Reference_Information: Metadata_Date: 20110307 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Larry Poppe Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 x2314 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: lpoppe@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None Metadata_Use_Constraints: None Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile