Identification_Information:
Citation:
Citation_Information:
Originator: Schwab, Bill
Publication_Date: 2000
Title:
Archive of Water Gun Subbottom Data Collected During USGS Cruise SEAX 96004, New York Bight,
1 May - 9 June, 1996
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: U.S. Geological Survey
Other_Citation_Details: none
Online_Linkage: none
Description:
Abstract:
This DVD-ROM contains digital high resolution seismic reflection data collected during the USGS SEAX 96004 cruise. The coverage is the nearshore of the New York and New Jersey Apex. The seismic-reflection data are stored as SEG-Y standard format that can be read and manipulated by most seismic-processing software. Much of the information specific to the data are contained in the headers of the SEG-Y format files. The file system format is UDF (Universal Disc Format--ISO 9660 equivalent) which can be read with DOS, Unix, and MAC operating systems with the appropriate DVD-ROM driver software installed.
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, sea-floor 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). Data collected in 1996, USGS cruise SEAX96004, augments data collected in 1995 with sidescan sonar and seismic reflection data collected within the New York Bight Apex region. This report is an archive of the water gun seismic reflection data collected in 1996.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19960501
Beginning_Time: 000000
Ending_Date: 19960609
Ending_Time: 000000
Currentness_Reference: publication date
Status:
Progress: In work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.84
East_Bounding_Coordinate: -73.03
North_Bounding_Coordinate: 40.67
South_Bounding_Coordinate: 40.35
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: seismic reflection
Theme_Keyword: SEG-Y
Theme_Keyword: water gun
Theme_Keyword: UDF DVD-ROM
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Atlantic Ocean
Place_Keyword: New York
Place_Keyword: NY
Place_Keyword: Apex
Place_Keyword: New York Bight
Access_Constraints: for U.S. Geological Survey use only
Use_Constraints: for U.S. Geological Survey use only
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:
U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus
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: Seafloor Mapping Group
Native_Data_Set_Environment: SEG-Y
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value:
Attribute_Accuracy_Explanation:
Logical_Consistency_Report:
The SEG-Y files were plotted onboard ship using SIOSEIS seismic processing software
Completeness_Report: archive of SEG-Y format seismic data
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
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value:
Vertical_Positional_Accuracy_Explanation:
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.
Source_Used_Citation_Abbreviation:
Process_Date: 199705
Source_Produced_Citation_Abbreviation:
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:
U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus
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:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: .9997
Longitude_of_Central_Meridian: -75
Latitude_of_Projection_Origin: 0
False_Easting: 0
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:
U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus
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 Suvey Internal DVD-ROM Data Archive
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: DVD-ROM
Format_Version_Number: UDF DVD-ROM
Format_Specification:
Format_Information_Content: SEG-Y
File_Decompression_Technique: none
Transfer_Size: 4.5 Gb
Digital_Transfer_Option:
Offline_Option:
Offline_Media: DVD-ROM
Recording_Format: UDF
Compatibility_Information: UNIX, DOS, MAC

Fees:
Metadata_Reference_Information:
Metadata_Date: 20000809
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Foster, David
Contact_Organization: U.S. Geological Survey
Contact_Position: Seafloor Mapping Group
Contact_Address:
Address_Type: mailing address
Address:
U.S. Geological Survey Woods Hole Field Center 384 Woods Hole Road Quissett Campus
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: FGDC Content Standard
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 Tue Sep 05 16:32:03 2000