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CAPESOUTH_GEO4M_XYZ.TXT: ASCII formatted file of the 4-m bathymetry from the southern half of USGS Survey 98015 of the Sea Floor off Eastern Cape Cod (Geographic)

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2006
Title:
CAPESOUTH_GEO4M_XYZ.TXT: ASCII formatted file of the 4-m bathymetry from the southern half of USGS Survey 98015 of the Sea Floor off Eastern Cape Cod (Geographic)
Edition: 1.0
Geospatial_Data_Presentation_Form: tabular digital data
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/capesouth_geo4m_xyz.zip>
Online_Linkage:
<http://pubs.usgs.gov/of/2005/1048/data/bathymetry/grid/capesouth_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 data 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: -69.999976
East_Bounding_Coordinate: -69.828314
North_Bounding_Coordinate: 41.969982
South_Bounding_Coordinate: 41.616648
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: ISO 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_Person_Primary:
Contact_Person: Lawrence 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:
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: 19980925
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 (capesouth.r4) was a floating point binary file.

Source_Used_Citation_Abbreviation: 98015_multibeam_data
Process_Date: Unknown
Source_Produced_Citation_Abbreviation: capesouth.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: capesouth.r4
Source_Produced_Citation_Abbreviation: capesouth_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 mean lower low water 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_Voice_Telephone: (508) 548-8700
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 (capesouth_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/capesouth_geo4m_xyz.zip>
Network_Resource_Name:
<http://pubs.usgs.gov/of/2005/1048/data/bathymetry/grid/capesouth_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/>
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

Generated by mp version 2.8.6 on Thu Mar 23 10:02:14 2006