Identification_Information:
Citation:
Citation_Information:
Originator: Hill, et al.
Publication_Date: 2001
Title:
Archive of Water Gun Subbottom Data Collected During USGS Cruise SEAX 95007 New York Bight, 7-25 May, 1995
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: U.S. Geological Survey
Description:
Abstract:
This DVD-ROM contains copies of the navigation and field water gun subbottom data collected aboard the R/V Seaward Explorer, from 7-25 May, 1995. The coverage is in the New York Bight area. This DVD-ROM (Digital Versatile Disc-Read Only Memory) has been produced in accordance with the UDF (Universal Disc Format) DVD-ROM Standard (ISO 9660 equivalent) and is therefore capable of being read on any computing platform that has appropriate DVD-ROM driver software installed. Access to the data and information contained on this DVD-ROM was developed using the HyperText Markup Language (HTML) utilized by the World Wide Web (WWW) project. Development of the DVD-ROM documentation and user interface in HTML allows a user to access the information by using a variety of WWW information browsers (i.e. NCSA Mosaic, Netscape) to facilitate browsing and locating information and data. To access the information contained on this disk with a WWW client browser, open the file'index.htm' at the top level directory of this DVD-ROM with your selected browser. The HTML documentation is written utilizing some HTML 4.0 enhancements. The disk should be viewable by all WWW browsers but may not properly format on some older WWW browsers. Also, some links to USGS collaborators and other agencies are available on this DVD-ROM. These links are only accessible if access to the Internet is available during browsing of the DVD-ROM.

The archived water gun subbottom data are in standard Society of Exploration Geologists (SEG) SEG-Y format (Barry and others, 1975) and may be downloaded for processing with software such as Seismic Unix or SIOSEIS. DOS and Microsoft Windows compatible software for plotting SEG-Y files (PLOTSEIS) and viewing SEG-Y headers (DUMPSEGY) is located in the PLOTSEIS directory. Processed water gun profiles (GIF images) may be viewed on this DVD-ROM with your WWW browser.

Purpose:
Beginning in 1995, the USGS, in cooperation with the U.S Army Corps of Engineers (USACE), New York District, began a program to generate reconnaissance maps of the sea floor offshore of the New York-New Jersey metropolitan area, one of the most populated coastal regions of the United States. The goal of this mapping program is to provide a regional synthesis of the sea-floor environment, including a description of sedimentary environments, sediment texture, seafloor morphology, and geologic history to aid in understanding the impacts of anthropogenic activities, such as ocean dumping. This mapping effort differs from previous studies of this area by obtaining digital, sidescan sonar images that cover 100 percent of the sea floor.

This investigation was motivated by the need to develop an environmentally acceptable solution for the disposal of dredged material from the New York - New Jersey Port, by the need to identify potential sources of sand for renourishment of the southern shore of Long island, and by the opportunity to develop a better understanding of the transport and long-term fate of contaminants by investigations of the present distribution of materials discharged into the New York Bight over the last 100+ years (Schwab and others, 1997).

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19950507
Beginning_Time: 0000000
Ending_Date: 19950525
Ending_Time: 0000000
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.90
East_Bounding_Coordinate: -73.49
North_Bounding_Coordinate: 40.58
South_Bounding_Coordinate: 40.36
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: seismic reflection
Theme_Keyword: SEG-Y
Theme_Keyword: Water gun
Theme_Keyword: high resolution
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Atlantic Ocean
Place_Keyword: New York
Place_Keyword: New York Bight
Place_Keyword: Apex
Place_Keyword: NY
Place_Keyword: Long Island inner shelf
Place_Keyword: USGS
Place_Keyword: Woods Hole Field Center (WHFC)
Place_Keyword: Eastern Regional Center
Access_Constraints:
This USGS must be referenced as the originator of the dataset in any future products or research derived from the data.
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Schwab, Bill
Contact_Organization: U.S. Geological Survey
Contact_Position: Seafloor Mapping Project
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
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: bschwab@usgs.gov
Data_Set_Credit: Hill, Jenna C., Schwab, William C., Foster, David S.
Native_Data_Set_Environment: SEG-Y
Data_Quality_Information:
Logical_Consistency_Report:
This data set is from a single cruise and collection platform, therefore logically consistent.
Completeness_Report: All recorded lines are present.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: The ship was navigated with differential GPS
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 5-10 meters
Horizontal_Positional_Accuracy_Explanation: DGPS is assumed to be accurate within 5-10 meters
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The vertical position was local sea level and there was no correction to a datum or tides.
Lineage:
Process_Step:
Process_Description:
The water gun data was recorded using Xseismics on a MASSCOMP system. Xseismics is a software/hardware package that consisted of Concurrent Computer Corp. Unix based data collection system. This included a 12 bit Analog / Digital converter, an X window display, 8mm tape device, network interface. The software was developed inhouse. This software controlled the data collection system, logged SEGY format seismic data and also displayed seismic data on the X terminal.
Process_Date: 1995
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Foster, David S.
Contact_Organization: U.S. Geological Survey
Contact_Position: Seafloor Mapping Project
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
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dfoster@usgs.gov
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
Horizontal X and Y UTM coordinates for each shot location are located in the SEG-Y trace headers
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: .9996
Longitude_of_Central_Meridian: -75
Latitude_of_Projection_Origin: 0
False_Easting: 500000
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 5
Ordinate_Resolution: 5
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298257
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: assumed sea level
Altitude_Resolution: 1
Altitude_Distance_Units: two-way travel time
Altitude_Encoding_Method: Attribute values
Depth_System_Definition:
Depth_Datum_Name: local surface (sea level)
Depth_Resolution: 1
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute values
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
The data were acquired using a 15 cubic inch water gun seismic profiling system. ITI and Benthos streamers were the receivers. Seismic data were logged digitally with the Masscomp/Xsesimics acquisition system. The SEG-Y data were checked for quality with Seismic Unix seismic processing software and are archived on this DVD-ROM. The SEG-Y format is described in detail by Barry and others (1975). The files are in standard 32-bit IBM floating point SEG-Y format. The SEG-Y files consist of shot files of two traces per shot. Channel one was an ITI streamer and channel 2 when recorded was a Teledyne streamer. There are 2048 samples per trace. The sample rate was 0.5 ms which resulted in a trace length of 1024 ms. The water gun was fired at a rate of 5 seconds.
Entity_and_Attribute_Detail_Citation:
Barry, K.M., Cavers, D.A., and Kneale, C.W., 1975, Recommended standards for digital tape formats, in Digital Tape Standards; Society of Exploration Geophysicists ["Recommended standards for digital tape formats" reprinted from Geophysics, v. 32, p. 1073 - 1084; v. 37, p. 36-44; v. 40, p. 344 - 352.] p. 22 - 30.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Soderberg, Nancy
Contact_Organization: U.S. Geological Survey
Contact_Position: Data Library
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
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: nsoderberg@usgs.gov
Resource_Description: U.S. Geological Survey Open-file Report 01-157 DVD-ROM
Distribution_Liability:
This Digital Versatile Disc-Read Only Memory (DVD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published on this DVD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SEG-Y
Format_Information_Content:
The SEG-Y standard format (Barry and others, 1975) consists of the following: A 3600-byte reel identification header with the first 3200 bytes consisting of a EBCDIC header block and a 400-byte binary header block. Both headers include information specific to line and reel number. The trace data block follows the reel identification header. The first 240 bytes of each trace block is the binary trace identification header. The seismic data samples follow the trace identification header.
File_Decompression_Technique: none
Transfer_Size: 4.2 Gb
Digital_Transfer_Option:
Offline_Option:
Recording_Format: UDF
Offline_Media: DVD-ROM
Compatibility_Information: UNIX, DOS, MAC
Fees:
Available from the Denver Open-File Sales department, price varies.
Metadata_Reference_Information:
Metadata_Date: 20010206
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Foster, David S.
Contact_Organization: U.S. Geological Survey
Contact_Position: Seafloor Mapping Group
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
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dfoster@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: universal time
Metadata_Access_Constraints: none
Metadata_Use_Constraints: none

Generated by mp version 2.5.4 on Fri Feb 09 17:03:56 2001