Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1998 Title: USGS Cruise ALPH98013 Sidescan Sonar Data Files Edition: 1 Geospatial_Data_Presentation_Form: remote-sensing data archive Series_Information: Series_Name: Open-File Report Issue_Identification: 98-590 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.3133/ofr98590 Larger_Work_Citation: Citation_Information: Originator: J.F. Denny Originator: W.C. Schwab Originator: W.W. Danforth Originator: T.F. O'Brien Originator: D.S. Foster Originator: D.R. Nichols Originator: B.J. Irwin Publication_Date: 1998 Title: Archive of sidescan-sonar and DGPS navigation field data collected on USGS Cruise ALPH98013, September 10-23, 1998 Edition: 1 Series_Information: Series_Name: Open-File Report Issue_Identification: 98-590 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Denny, J.F., Schwab, W.C., Danforth, W.W., O'Brien, T.F., Foster, D.S., Nichols, D.R., and Irwin, B.J., 1998, Archive of sidescan-sonar and DGPS navigation field data collected on USGS Cruise ALPH98013, September 10-23, 1998: U.S. Geological Survey Open-File Report 98-590, https://doi.org/10.3133/ofr98590. Online_Linkage: https://doi.org/10.3133/ofr98590 Description: Abstract: This CD-ROM contains digital high resolution sidescan-sonar data collected during USGS cruise ALPH98013 aboard the F/V Alpha & Omega II. The coverage lies within the New York Bight Apex, offshore the Long Island and New Jersey coasts. This CD-ROM (Compact Disc-Read Only Memory) has been produced in accordance with the ISO 9660 CD-ROM Standard and is therefore capable of being read on any computing platform that has appropriate CD-ROM driver software installed. Access to the data and information contained on this CD-ROM was developed using the HyperText Markup Language (HTML) utilized by the World Wide Web (WWW) project. Development of the CD-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 CD-ROM with your selected browser. The HTML documentation is written utilizing some HTML 3.0 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 are available on this CD-ROM. These links are only accessible if access to the Internet is available during browsing of the CD-ROM. The archived sidescan-sonar data may be downloaded and processed. Software is available on this CD-ROM for viewing the individual swaths using computer systems running the UNIX operating system. Purpose: In 1995, the USGS, in cooperation with the U.S Army Corps of Engineers (USACOE), 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. Sidescan-sonar data collected in May 1995 and May 1996 (USGS Cruises Seax95007 and Seax96004, respectively) were digitally mosaicked to provide a base suitable for use in Geographic Information Systems of the New York Bight Apex region (Schwab, W.C., Corso, W., Allison, M.A., Butman, B., Denny, J.F., Lotto, L., Danforth, W.W., Foster, D.S., O'Brien, T.F., Nichols, D.A., Irwin, B.J., and Parolski, K.F., 1997, Mapping the Sea Floor Geology Offshore of the New York-New Jersey Metropolitan Area Using Sidescan-Sonar: Preliminary Report:U.S. Geological Survey Open-File REport 97-61, 3 Sheets). The data collected during USGS Cruise ALPH98013 augment the New York Bight Apex Mapping Project by extending the sidescan-sonar and seismic reflection coverage to the east in an ~ 23 km x ~32 km area. These data will be instrumental in developing a more comprehensive understanding of the inner shelf geology within the New York Bight Apex. Supplemental_Information: For more information on the field activity associated with these data, see https://cmgds.marine.usgs.gov/fan_info.php?fan=1998-013-FA Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19980910 Beginning_Time: 141839 Ending_Date: 19980923 Ending_Time: 101246 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -74.040985 East_Bounding_Coordinate: -73.202370 North_Bounding_Coordinate: 40.615343 South_Bounding_Coordinate: 40.163133 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:cb824469-57ef-47b9-ba00-69b56b57c01b Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Digital sidescan-sonar Theme_Keyword: Raw sidescan-sonar data Theme_Keyword: ISIS data collection system Theme_Keyword: 40 centimeters / pixel Theme_Keyword: high resolution Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: sidescan sonar Theme_Keyword: sea-floor acoustic reflectivity Theme_Keyword: sea-floor characteristics Theme_Keyword: marine geophysics Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: imageryBaseMapsEarthCover Place: Place_Keyword_Thesaurus: None Place_Keyword: Atlantic Ocean Place_Keyword: New York Bight Apex Place_Keyword: Long Island Place_Keyword: New Jersey Place_Keyword: USGS Place_Keyword: Woods Hole Field Center (WHFC) Place_Keyword: Eastern Regional Center Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: 1998 Access_Constraints: USGS access only until published. Use_Constraints: None. The United States Geological Survey (USGS) Woods Hole Field Center asks to be credited in derived products. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS, Woods Hole Field Center Contact_Person: William Schwab Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: USA Contact_Voice_Telephone: (508)-548-8700 Contact_Facsimile_Telephone: (508)-457-2310 Contact_Electronic_Mail_Address: bschwab@usgs.gov Data_Quality_Information: Logical_Consistency_Report: None Completeness_Report: None Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The ship was navigated with differential GPS. DGPS is assumed to be accurate within 5-10 meters Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 10 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 Lineage: Process_Step: Process_Description: No processing steps or corrections have been applied to these data. The files contain "raw" field data. Data files were collected using a range of 187.5 meters/side. The exceptions are test1 - l4f3, l8f2 - l25f1, which were collected using a range of 93.75 meters/side. All times are recorded in Universal Time Coordinated (UTC). Process_Date: 1998 Process_Step: Process_Description: The metadata from the Open-File report was edited to remove errors as well as update some information. Edits include updating the citation section with the OFR information, fixed the time period of content to cruise dates, added supplemental information with link to the field activity page on CMGDS, added the USGS Thesaurus and ISO 19115 Topic Category thesaurus, added keywords section with USGS persistent identifier as theme keyword, removed browse graphic section – since there isn’t one included in the report (information was pointing users to an obsolete system), removed empty source information in the lineage section, filled out the blank field for the NAD83 horizontal coordinate system, used a generic email address in metadata, updated digital transfer information, replaced distribution liability with FSP statement, added additional information to the first process step with acquisition information. Other blank fields were deleted. The metadata date (19980910), but not the contact (except email and contact instructions) was updated. The metadata available from a harvester may supersede metadata available from the publication. These edits were performed on 20210816. The originator name was changed from Sea-Floor Mapping Project, USGS Woods Hole Field Center, 384 Woods Hole Road, Woods Hole, MA 02543-1598 to U.S. Geological Survey. The metadata contact organization was also changed to U.S. Geological Survey. Compare the metadata dates to determine which metadata file is most recent. Updated the bounding coordinates to better reflect the data coverage (20211229) Process_Date: 20211229 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The data were collected using a Datasonics SIS-1000 sidescan-sonar towfish. The system emits a CHIRP (swept FM) signal from 100-113 kHZ. The return signal is correlated with the calibrated outgoing signal and matched filtered to extract the signal amplitude for each data sample. The signal is digitized at the towfish and sent up the cable where it is collected and merged with bathymetry, navigation and towfish telemetry (pitch, roll) using Triton Technologies Inc. ISIS system. The collected sidescan-sonar data are stored as 16 bit values representing a 0-10 volt range. Entity_and_Attribute_Detail_Citation: None Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS, Woods Hole Field Center Contact_Person: William Schwab 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) 457-2299 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: bschwab@usgs.gov Resource_Description: U.S. Geological Survey Internal CD-ROM Data Archive Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: QMIPS DAT files Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.3133/ofr98590 Offline_Option: Offline_Media: CD-ROM Recording_Format: ISO 9660 Fees: Contact USGS for more information. Metadata_Reference_Information: Metadata_Date: 20211229 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Chris Polloni 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) 457-2280 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address to replace that of cpolloni@usgs.gov who is no longer with the USGS. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: June 8, 1994