Identification_Information: Citation: Citation_Information: Originator: National Oceanic and Atmospheric Administration Publication_Date: 2008 Title: H11044_1_5MDDEG_XYZ.TXT: Original Uninterpolated 1.5-m Bathymetry from NOAA Survey H11044 off Milford, Connecticut Edition: 1.0 Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2008-1146 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/2008/1146/data/bathy/grids/geo/asciigrid/h11044_1_5mddeg_xyz.zip Online_Linkage: http://pubs.usgs.gov/of/2008/1146/data/bathy/grids/geo/asciigrid/h11044_1_5mddeg_xyz.txt Online_Linkage: http://pubs.usgs.gov/of/2008/1146/html/catalog.html Larger_Work_Citation: Citation_Information: Originator: L.J. Poppe Originator: S.D. Ackerman Originator: K.Y. McMullen Originator: P.T. Schattgen Originator: J.D. Schaer Originator: E.F. Doran Publication_Date: 2008 Title: Interpolation of Reconnaissance Multibeam and Single-Beam Bathymetry Offshore of Milford, Connecticut Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2008-1146 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/2008/1146/ Description: Abstract: During 2001 the NOAA Ship RUDE completed charting survey H11044 that covered a roughly 293 km2 area of the sea floor in north-central Long Island Sound, off Milford Connecticut. Although 100 percent coverage was achieved with sidescan sonar for charting purposes, only reconnaissance (spaced line) bathymetry was acquired with shallow-water multibeam and single-beam systems. Therefore, further processing was conducted at the USGS's Woods Hole Science Center to provide bathymetric datasets with more continuous coverage. This project produced grids and GeoTIFF imagery of the combined and interpolated shallow-water multibeam and single-beam bathymetry generated from the northern part of this data set. 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. 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 interpolated and gridded shallow-water multibeam and single-beam bathymetric data within specific areas of special interest. Purpose: To release the ASCII file containing the 1.5-m horizontally spaced bathymetry generated from NOAA survey H11044 in north-central Long Island Sound off Milford, Connecticut. This file contains the entire dataset, and not just the northern section covered by the other datasets released as part of this project. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20010507 Ending_Date: 20011113 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -73.131256 East_Bounding_Coordinate: -72.936531 North_Bounding_Coordinate: 41.2463314 South_Bounding_Coordinate: 41.023193 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: NOAA survey H11044 Theme_Keyword: H11044 Theme_Keyword: National Oceanic and Atmospheric Administration Theme_Keyword: NOAA Theme_Keyword: Reson 8125 Theme_Keyword: Open-File Report 2008-1146 Theme_Keyword: ASCII text Theme_Keyword: OFR 2008-1146 Theme_Keyword: point grid Theme_Keyword: single-beam bathymetry Theme_Keyword: shallow-water multibeam Theme_Keyword: Reson SeaBat 9003 echosounder Theme_Keyword: Odom Echotrac DF-3200 echosounder 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: Milford Place_Keyword: U.S. East Coast Place_Keyword: United States Place_Keyword: North America Place_Keyword: Atlantic Ocean Place_Keyword: Long Island Sound Place_Keyword: Stratford Point Place_Keyword: Charles Island 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) as the originator 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/2008/1146/data/bathy/grids/geo/asciigrid/h11044_1_5mddeg_xyz.gif Browse_Graphic_File_Description: Thumbnail image showing the extent of soundings collected during NOAA survey H11044 Browse_Graphic_File_Type: GIF Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 Cross_Reference: Citation_Information: Originator: L.J. Poppe Originator: S.D. Ackerman Originator: E.F. Doran Originator: A.L. Beaver Originator: J.M. Crocker Originator: P.T. Schattgen 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 Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2005/1145/ Data_Quality_Information: Completeness_Report: All collected data from NOAA survey H11044 were processed and used to produce this dataset. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigation was by differential GPS Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The vertical resolution of the shallow-water multibeam data is approximately 0.5% of the water depth. Lineage: Source_Information: Source_Citation: Citation_Information: Type_of_Source_Media: DVD-ROM Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20010507 Ending_Date: 20011113 Source_Currentness_Reference: ground condition Source_Contribution: The original processed shallow-water multibeam and single-beam bathymetric data. Process_Step: Process_Description: The multibeam data were acquired in XTF (extended Triton data format) and recorded digitally through an ISIS data acquisition system. A Reson SeaBat 9003 echosounder was used to acquire the shallow-water multibeam bathymetric data and an Odom Echotrac DF-3200 dual-frequency echosounder was used to acquire the single-beam bathymetry from the NOAA ship Rude. An Odom Echotrac DF-3200 dual-frequency echosounder hull-mounted on a 23' launch deployed from the NOAA ship Rude was used to acquire sounding data in the shallower areas. These data were processed using CARIS HIPS (Hydrographic Image Processing System) software for quality control, and to incorporate sound velocity and tidal corrections. 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 multibeam acquisition. Tidal zone corrections were calculated from data acquired at tidal gauges at Bridgeport and NewHaven, Connecticut, and at Kings Point, New York. The vertical resolution of the shallow-water multibeam data is approximately 0.5% of the water depth. The data were gridded to 1.5-m resolution and exported in text (.txt) format. Vertical datum is mean lower low water; X and Y units are decimal degrees. Process_Date: Unknown Source_Produced_Citation_Abbreviation: h11044_1_5mddeg_xyz.txt Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Oceanic and Atmospheric Administration Contact_Person: Tod Schattgen Contact_Position: Commanding Officer 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: 757-647-0187 Contact_Electronic_Mail_Address: Tod.Schattgen@noaa.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000000001 Longitude_Resolution: 0.000000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Depth_System_Definition: Depth_Datum_Name: Mean lower low water Depth_Resolution: 0.001 Depth_Distance_Units: meters Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Three space separated values per record. Value one is latitude in decimal degrees of the ship coordinate; value 2 is the longitude in decimal degrees the ship's coordinate; value three is the acquired depth value. The depth value is recorded in meters (to three decimal places) as a positive value. 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 (File size: Text version 2.74Gb, WinZipped version 7.86 Mb) Distribution_Liability: Neither the U.S. Government, the Department of the Interior, the USGS, NOAA, Connecticut Department of Environmental Protection, 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. 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: ASCII Format_Information_Content: The ASCII data (h11044_1_5mddeg_xyz.txt), browse graphic, and metadata. Caution: The downloadable files are large: text version is 2.74 Gb, the WinZipped version is 786 Mb. File_Decompression_Technique: zip archive Transfer_Size: 786.0 Mb Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2008/1146/data/bathy/grids/geo/asciigrid/h11044_1_5mddeg_xyz.zip Network_Resource_Name: http://pubs.usgs.gov/of/2008/1146/data/bathy/grids/geo/asciigrid/h11044_1_5mddeg_xyz.txt Network_Resource_Name: http://pubs.usgs.gov/of/2008/1146/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: The user must have a program capable of reading and processing ASCII formatted XYZ data files. Available_Time_Period: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Metadata_Reference_Information: Metadata_Date: 20080930 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