Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2007 Title: COMP2M_GEO: Composite 2-m Bathymetric ArcRaster Grid of National Oceanic and Atmospheric Administration (NOAA) Surveys H11252 and H11361 from Eastern Long Island Sound (Geographic) Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2007-1191 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2007/1191/data/composite/bathy/grids/geo/comp2m_geo.zip Online_Linkage: http://pubs.usgs.gov/of/2007/1191/data/composite/bathy/grids/geo/ Online_Linkage: http://pubs.usgs.gov/of/2007/1191/html/catalog.html Larger_Work_Citation: Citation_Information: Originator: L.J. Poppe Originator: J.F. Denny Originator: S.J. Williams Originator: M.S. Moser Originator: N.A. Forfinski Originator: H.F. Stewart Originator: E.F. Doran Publication_Date: 2007 Title: The Geology of Six Mile Reef, Eastern Long Island Sound Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2007-1191 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Other_Citation_Details: 1 DVD-ROM Online_Linkage: http://pubs.usgs.gov/of/2007/1191/ Description: Abstract: The U.S. Geological Survey, in cooperation with the National Oceanic and Atmospheric Administration and the Connecticut Department of Environmental Protection, has produced detailed geologic maps of the sea floor in Long Island Sound, a major East Coast estuary surrounded by the most densely populated region of the United States. These studies have built upon cooperative research with the State of Connecticut that was initiated in 1982. The current phase of this research program is directed toward studies of sea-floor sediment distribution, processes that control sediment distribution, nearshore environmental concerns, and the relation of benthic community structures to the sea-floor geology. Anthropogenic wastes, toxic chemicals, and changes in land-use patterns resulting from residential, commercial, and recreational development have stressed the environment of the Sound, causing degradation and potential loss of benthic habitats (Koppelman and others, 1976; Long Island Sound Study, 1994). Detailed maps of the sea floor are needed to help evaluate the extent of adverse impacts and to help manage resources wisely in the future. Therefore, in a continuing effort to better understand Long Island Sound, we have constructed and interpreted multibeam bathymetric data within specific areas of special interest. The composite bathymetric grid in Geographic presented herein covers a roughly 156 km square area (surveys H11252 and H11361) of the sea floor in the area near Six Mile Reef, eastern Long Island Sound. The original multibeam bathymetric data were collected during 2004 as part of charting applications aboard the NOAA Survey Vessel Thomas Jefferson. A Simrad EM1002 multibeam system mounted on the hull of this vessel was used to acquire data along survey lines from the deeper water (>20 m) parts of the survey areas. Two 29-foot launches with hull-mounted Reson systems were deployed from the ship and were used to acquire data along survey lines from the shallower areas. Detailed bathymetric data and their interpretations serve many purposes, including: (1) defining the geological variability of the sea floor, which is one of the primary controls of benthic habitat diversity; (2) improving our understanding of the processes that control the distribution and transport of bottom sediments and the distribution of benthic habitats and associated infaunal community structures; and (3) providing a detailed framework for future research, monitoring, and management activities. The bathymetric data models also serve as base maps for subsequent sedimentological, geochemical, and biological observations, because precise information on environmental setting is important for selection of sampling sites and for accurate interpretation of point measurements. Purpose: To release a composite 2-m bathymetric ArcRaster grid generated from NOAA surveys H11252 and H11361 in Geographic Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -72.658359 East_Bounding_Coordinate: -72.393357 North_Bounding_Coordinate: 41.226032 South_Bounding_Coordinate: 41.143008 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Science Center Theme_Keyword: multibeam bathymetry Theme_Keyword: bathymetry Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: WHSC Theme_Keyword: Simrad EM1002 Theme_Keyword: Reson 8125 Theme_Keyword: Reson 8101 Theme_Keyword: NOAA Survey H11252 Theme_Keyword: H11252 Theme_Keyword: National Oceanic and Atmospheric Administration Theme_Keyword: NOAA Theme_Keyword: grid Theme_Keyword: Open-File Report 2007-1191 Theme_Keyword: Geographic Theme_Keyword: OFR2007-1191 Theme_Keyword: NOAA Project Identifier OPR-B370-TJ Theme_Keyword: Connecticut Department of Environmental Protection Theme_Keyword: CTDEP Theme_Keyword: ArcRaster grid Theme_Keyword: composite Theme_Keyword: composite grid Theme_Keyword: H11361 Theme_Keyword: NOAA survey H11361 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans and estuaries Theme_Keyword: oceans and coastal Theme_Keyword: elevation Place: Place_Keyword: Connecticut Place_Keyword: New York Place_Keyword: Long Island Sound Place_Keyword: U.S. East Coast Place_Keyword: United States Place_Keyword: North America Place_Keyword: Atlantic Ocean Place_Keyword: Six Mile Reef Access_Constraints: None Use_Constraints: Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) and the Connecticut Department of Environmental Protection (CTDEP) as the originators of this data set. Point_of_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 Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2007/1191/data/composite/bathy/grids/geo/comp2m_geo.gif Browse_Graphic_File_Description: Thumbnail image showing the composite 2-m bathymetric grid from NOAA surveys H11252 and H11361 in Geographic. Browse_Graphic_File_Type: GIF Data_Set_Credit: Source data were acquired during National Oceanic and Atmospheric Administration (NOAA) surveys H11252 and H11361 aboard the survey vessel Thomas Jefferson. Please acknowledge NOAA as the originator of the dataset from which this dataset was derived. Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780 Cross_Reference: Citation_Information: Originator: L.J. Poppe Originator: S.J. Williams Originator: M.S. Moser Originator: N.A. Forfinski Originator: H.F. Stewart Originator: E.F. Doran Publication_Date: 2007 Title: Quaternary geology and sedimentary processes in the vicinity of Six Mile Reef, eastern Long Island Sound Edition: 1.0 Series_Information: Series_Name: Journal of Coastal Research Issue_Identification: v. 23, no. 6 Data_Quality_Information: Attribute_Accuracy: Completeness_Report: All collected data were processed and used to produce this dataset. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigation was by differential GPS. Horizontal resolution of the data varies with water depth, but averages 2 m. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Vertical resolution is about 0.5% of the water depth. Lineage: Source_Information: Type_of_Source_Media: DVD-ROM Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Source_Currentness_Reference: ground condition Source_Contribution: The original multibeam bathymetric data acquired with Simrad EM1002, Reson 8101, and 8125 echosounder systems during NOAA surveys H11252 and H11361 aboard the NOAA ship Thomas Jefferson. A Simrad EM1002 multibeam system mounted on the hull of this vessel was used to acquire data along survey lines from the deeper water (>20 m) parts of the survey areas. Two 29-foot launches with hull-mounted Reson systems were deployed from the ship and were used to acquire data along survey lines from the shallower areas. Process_Step: Process_Description: The multibeam data were acquired in XTF (extended Triton data format), recorded digitally through an ISIS data acquisition system, and processed using CARIS HIPS (Hydrographic Image Processing System) software for quality control, to incorporate sound velocity and tidal corrections, and to produce base surfaces averaging 2-m resolution over the study area. The raw bathymetric data were exported in ASCII text format in UTM Zone 18. Source_Used_Citation_Abbreviation: raw bathymetric data Source_Produced_Citation_Abbreviation: h11252_2mutm18_xyz.txt Source_Produced_Citation_Abbreviation: h11361_2mutm18_xyz.txt Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Marc Moser Contact_Organization: National Oceanic and Atmospheric Administration Contact_Position: Field Operations Officer Contact_Address: Address_Type: mailing and physical address Address: 439 West York Street City: Norfolk State_or_Province: VA Postal_Code: 23510 Country: USA Contact_Voice_Telephone: 757-441-6726 Contact_Electronic_Mail_Address: marc.s.moser@noaa.gov Process_Step: Process_Description: The xyz (easting, northing, and depth) data were combined using the University of New Brunswick SwathEd weigh_grid command. The composite grid created in SwathEd was then imported into IVS Fledermaus (DMagic). Data were then exported as an ESRI Grid file using IVS DMagic Export Surface. Source_Used_Citation_Abbreviation: h11252_2mutm18_xyz.txt Source_Used_Citation_Abbreviation: h11361_2mutm18_xyz.txt Process_Date: 2007 Source_Produced_Citation_Abbreviation: comp2m_utm Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jane Denny Contact_Organization: U.S. Geological Survey Contact_Position: GIS Specialist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-548-8700 x2311 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: jdenny@usgs.gov Process_Step: Process_Description: ESRI "Project Raster" was used to convert the grid from UTM Zone 18 to Geographic. Source_Used_Citation_Abbreviation: comp2m_utm Source_Produced_Citation_Abbreviation: comp2m_geo Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jane Denny Contact_Organization: U.S. Geological Survey Contact_Position: GIS Specialist 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 x2311 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: jdenny@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 4618 Column_Count: 14740 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Planar: Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 0.000018 Ordinate_Resolution: 0.000018 Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Vertical_Coordinate_System_Definition: Depth_System_Definition: Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: comp2m_geo Attribute: Attribute_Label: ObjectID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Value Attribute: Attribute_Label: Count Overview_Description: Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Larry Poppe Contact_Position: Geologist Contact_Address: Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 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: Although this data set has been used by the U.S. Geological Survey (USGS), National Oceanic and Atmospheric Administration (NOAA), and the Connecticut Department of Environmental Protection (CTDEP), no warranty, expressed or implied, is made by the USGS, NOAA, and the Connecticut DEP as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by these agencies 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 Raster Grid Format_Information_Content: A zip archive containing the bathymetric grid, browse graphic and metadata. File_Decompression_Technique: zip archive Transfer_Size: 262.185 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2007/1191/data/composite/bathy/grids/geo/comp2m_geo.zip Network_Resource_Name: http://pubs.usgs.gov/of/2007/1191/data/composite/bathy/grids/geo/ Network_Resource_Name: http://pubs.usgs.gov/of/2007/1191/html/catalog.html Access_Instructions: Data are downloadable via the World Wide Web (WWW) Offline_Option: Offline_Media: DVD-ROM Recording_Capacity: Recording_Density: 4.75 Recording_Density_Units: Gbytes Recording_Format: UDF Fees: None Technical_Prerequisites: These data are available in Environmental Systems Research Institute (ESRI) Raster GRID format. The user must have software capable of importing and processing the data files. Available_Time_Period: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Metadata_Reference_Information: Metadata_Date: 20070817 Metadata_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 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