Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2006 Title: CAPENORTH_GEO4M_XYZ.TXT: ASCII formatted file of the 4-m bathymetry from the northern half of USGS survey 98015 of the Sea Floor off Eastern Cape Cod (Geographic) Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1048 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/2005/1048/data/bathymetry/grid/capenorth_geo4m_xyz.zip Online_Linkage: http://pubs.usgs.gov/of/2005/1048/data/bathymetry/grid/capenorth_geo4m_xyz.txt Online_Linkage: http://pubs.usgs.gov/of/2005/1048/htmldocs/data_catalog.htm Online_Linkage: http://pubs.usgs.gov/of/2005/1048/data/bathymetry/grid/ Larger_Work_Citation: Citation_Information: Originator: L.J. Poppe Originator: V.F. Paskevich Originator: B. Butman Originator: S.D. Ackerman Originator: W.W. Danforth Originator: D.S. Foster Originator: D.S. Blackwood Publication_Date: 2006 Title: Geological Interpretation of Bathymetric and Backscatter Imagery of the Sea Floor off Eastern Cape Cod, Massachusetts Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1048 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/2005/1048/ Description: Abstract: This data set includes bathymetry of the sea floor offshore of eastern Cape Cod, Massachusetts. The data were collected with a multibeam sea floor mapping system during USGS survey 98015, conducted November 9 - 25, 1998. The surveys were conducted using a Simrad EM 1000 multibeam echosounder mounted aboard the Canadian Coast Guard vessel Frederick G. Creed. This multibeam system utilizes 60 electronically aimed receive beams spaced at intervals of 2.5 degrees that insonify a strip of sea floor up to 7.5 times the water depth (swath width of 100 to 200 m within the survey area). The horizontal resolution of the beam on the sea floor is approximately 10% of the water depth. Vertical resolution is approximately 1 percent of the water depth. Purpose: To release the ASCII file containing the 4-m bathymetry generated from USGS survey 98015 off eastern Cape Cod. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19981109 Ending_Date: 19981125 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.307809 East_Bounding_Coordinate: -69.828308 North_Bounding_Coordinate: 42.116649 South_Bounding_Coordinate: 41.966641 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: seafloor elevation Theme_Keyword: ASCII formatted file Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: WHSC Theme_Keyword: Simrad EM1000 Theme_Keyword: Field Activity Number 98015 Theme: Theme_Keyword_Thesaurus: IS0 19115 Topic Category Theme_Keyword: oceans and estuaries Theme_Keyword: oceans and coastal Theme_Keyword: elevation Place: Place_Keyword_Thesaurus: General Place_Keyword: Cape Cod Place_Keyword: Massachusetts Place_Keyword: Cape Cod National Seashore Park Place_Keyword: U.S. East Coast Place_Keyword: United States Place_Keyword: North America Place_Keyword: Atlantic Ocean 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 U.S. Geological Survey (USGS) as the source of this information. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Lawrence 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: Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 Cross_Reference: Citation_Information: Originator: L.J. Poppe Originator: D.S. Foster Originator: W.W. Danforth Publication_Date: 2006 Title: Character and distribution of exposed glaciodeltaic deposits off outer Cape Cod, Massachusetts, and their effects on hydrogeology and benthic habitats Edition: 1.0 Series_Information: Series_Name: Geo-Marine Letters Issue_Identification: v. 26 Publication_Information: Publication_Place: Germany Publisher: Springer Data_Quality_Information: 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 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: 19981109 Ending_Date: 19981125 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: 98015_multibeam_data Source_Contribution: The original multibeam bathymetric data acquired with a Simrad EM 1000 echosounder during USGS cruise 98015 aboard the Canadian Coast Guard vessel Frederick G. Creed Process_Step: Process_Description: (1) Data and acquisition processing at sea: After the echo sounder data were logged onto the hard disk of the Sun workstation, a suite of processing software developed by the Ocean Mapping Group (www.omg.unb.ca/~jhc/SwathEd.html) was used to correct for artifacts and errors that may have been introduced during data collection. This software also enhanced the corrected data by resolving beam pattern and aspect ratio distortions and by imposing a linear contrast stretch before it generated bathymetric and sidescan sonar image mosaicks in a Mercator projection. All data processing described here is initiated using Silicon Graphics workstations as soon as each acquisition file is closed by the Simrad Mermaid workstation (usually at the end of each survey line). Additional processing was done in the lab to correct for fluctuations in sea level during the survey and for artifacts in the data files that were not corrected in the field (see below). (2) The processing and editing steps on board the ship were: (A.) Demultiplex, or unravel, the acquired Simrad data files using RT to generate separate files containing navigation, depth soundings, sidescan sonar backscatter values, and sound velocity information. (B.) Automatically reject bad data (autoRejectSoundings). For the multibeam soundings, reject data outside expected depth ranges (operator's decision based on nautical chart data); for navigation data, reject fixes with poor GPS statistics. (C.) Edit the navigation data on-screen using jview to remove undesirable points, including turns at the ends of survey lines. (D.) Edit the multibeam soundings on-screen using swathed to remove individual anomalous soundings. (E). Merge tidal information and the corrected navigation back (mergetide and mergenav) into the data files. Tidal information was obtained from predicted tides using the Xtide program http://www.flaterco.com/xtide/xtide.html), which generated predicted tides based on the harmonic coefficients for Chatham provided by the Xtide program. (F.) Map the bathymetric soundings from each processed data file onto a Mercator grid using weigh_grid (a SwathEd utility) with node spacings and scale selected by the operator. The grid file (capenorth.r4) was a floating point binary file. Source_Used_Citation_Abbreviation: 98015_multibeam_data Process_Date: Unknown Source_Produced_Citation_Abbreviation: capenorth.r4 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: William Danforth Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing 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 x2274 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: bdanforth@usgs.gov Process_Step: Process_Description: The SwathEd-created grid was converted into an ASCII xyz (decimal degrees and depths in negative meters) text file using a SwathEd utility (r4toASCII). Source_Used_Citation_Abbreviation: capenorth.r4 Source_Produced_Citation_Abbreviation: capenorth_geo4m_xyz.txt Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees 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: Altitude_System_Definition: Depth_System_Definition: Depth_Datum_Name: Mean lower low water 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 comma separated values (CSV) per record. Value one is the latitude coordinate in decimal degrees of the ship coordinate; value 2 is the longitude coordinate in decimal degrees of the ship's coordinate; value three is the acquired depth value. The depth value is recorded in meter as a negative 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 Distribution_Liability: Although this data set has been used by the USGS, no warranty, expressed or implied, is made by the USGS 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 the USGS 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: ASCII Format_Information_Content: The ASCII bathymetry (capenorth_geo4m_xyz.txt) and associated metadata. File_Decompression_Technique: zip archive Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2005/1048/data/bathymetry/grid/capenorth_geo4m_xyz.zip Network_Resource_Name: http://pubs.usgs.gov/of/2005/1048/data/bathymetry/grid/capenorth_geo4m_xyz.txt Network_Resource_Name: http://pubs.usgs.gov/of/2005/1048/htmldocs/data_catalog.htm Network_Resource_Name: http://pubs.usgs.gov/of/2005/1048/data/bathymetry/grid/capenorth_geo4m_xyz.txt 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 formated XYZ data files. Available_Time_Period: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Metadata_Reference_Information: Metadata_Date: 20060212 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