08_09_trackline

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Originator: Nancy T. DeWitt
Originator: James G. Flocks
Originator: Elizabeth A. Pendleton
Originator: Mark E. Hansen
Originator: B.J. Reynolds
Originator: Kyle W. Kelso
Originator: Dana S. Wiese
Originator: Charles R. Worley
Publication_Date: 2011
Publication_Time: 2011
Title: 08_09_tracklines
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: USGS Data Series Publication
Issue_Identification: DS675
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Online_Linkage: <https://pubs.usgs.gov/ds/675>
Description:
Abstract:
During the summers of 2008 and 2009 the USGS conducted bathymetric surveys from West Ship Island, Miss., to Dauphin Island, Ala., as part of the Northern Gulf of Mexico (NGOM) Ecosystem Change and Hazard Susceptibility project. The survey area extended from the shoreline out to approximately 2 kilometers and included the adjacent passes. The bathymetry was primarily used to create a topo-bathymetric map and provide a base-level assessment of the seafloor following the 2005 hurricane season. Additionally, these data will be used in conjunction with other geophysical data (chirp and side scan sonar) toward constructing a comprehensive geological framework of the Mississippi Barrier Island Complex. The culmination of the geophysical surveys will provide the data necessary for scientists to define, interpret, and provide baseline bathymetry and seafloor habitat for this area and to aid scientists in predicting future geomorpholocial changes of the islands with respect to climate change, storm impact, and sea-level rise. Furthermore, these data provide information for feasibility of barrier island restoration, particularly in Camille Cut, and efforts for the preservation of historical Fort Massachusetts.
Purpose:
This report serves as an archive of the processed single-beam and swath bathymetry data. Data products herein include gridded and interpolated surfaces, surface images, and x,y,z data products. Additional files include trackline maps, GIS files, Field Activity Collection System (FACS) logs, and formal FGDC metadata. Scanned images of the handwritten FACS logs are also provided as PDF files. Refer to the Acronyms page for expansion of acronyms and abbreviations used in this report.
Supplemental_Information:
For navigational purposes, bathymetric surveys have traditionally been referenced to a water level datum using tide gages and tide models. Bathymetric measurements referenced to a Global Positioning System (GPS) is a more accurate way of representing water depth and has been implemented in the acquisition and processing procedures for these datasets. Previous single-beam bathymetric studies performed at the USGS Center for Coastal and Marine Science have successfully referenced bathymetric measurements to GPS (DeWitt and others, 2007; Hansen 2008 and 2009). These surveys were conducted as a test to develop acquisition technology utilizing both single beam and swath bathymetry survey methods together and referencing both types of measurements to GPS rather than water level. Therefore, this survey is considered a seafloor-elevation survey and is explained in greater detail within this report. To accommodate coverage of this area in a limited timeframe, this seafloor-elevation survey was conducted using three techniques; single-beam bathymetry, interferometric swath bathymetry, and a walking kinematic survey of the island shorelines. All three techniques utilized GPS measurements. Implementation of these techniques was executed concurrently yet independently aboard two research vessels: the RV Survey Cat, a 26-foot (ft) shallow draft Glacier Bay Coastal Runner, and the 50-ft RV G.K. Gilbert. A portable push buggy with a rigid antenna-mount served as the platform for the kinematic shoreline survey. Data from each survey technique was post-processed and edited independently with proper inclusion of the differentially processed external navigation files. The x,y,z components from each method were then combined and the two survey years (2008 and 2009) were merged into one dataset. Chirp seismic data were also collected during these surveys and are archived separately.
Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20080708
Time_of_Day: unknown
Single_Date/Time:
Calendar_Date: 20080726
Time_of_Day: unknown
Single_Date/Time:
Calendar_Date: 20090605
Time_of_Day: unknown
Single_Date/Time:
Calendar_Date: 2090701
Time_of_Day: unknown
Currentness_Reference: data collection interval
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.006246
East_Bounding_Coordinate: -88.316241
North_Bounding_Coordinate: 30.275575
South_Bounding_Coordinate: 30.172352
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: elevation
Theme_Keyword: location
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: trackline
Theme_Keyword: bathymetry
Theme_Keyword: USGS
Theme_Keyword: shapefile
Theme_Keyword: HYPACK
Theme_Keyword: HYPACK Inc.
Theme_Keyword: single-beam bathymetry
Theme_Keyword: single beam
Theme_Keyword: swath bathymetry
Theme_Keyword: interferometric swath bathymetry
Theme_Keyword: swath
Theme_Keyword: Base Station
Theme_Keyword: Benchmark
Theme_Keyword: Fort Massachusetts
Theme_Keyword: WHRN
Theme_Keyword: WPTB
Theme_Keyword: kinematic
Theme_Keyword: shoreline
Theme_Keyword: Continuously Operating Reference Station (CORS)
Theme_Keyword: GeoTIFF
Theme_Keyword:
U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center
Theme_Keyword: Gulf Islands National Seashore (GUIS)
Theme_Keyword: SEA Ltd.
Theme_Keyword: Systems Engineering and Assessment
Theme_Keyword: SWATHplus interferometric
Theme_Keyword: SWATHplus Interferometric Swath System
Theme_Keyword: SWATHplus -H 468-kHz Interferometric system
Place:
Place_Keyword_Thesaurus: GUIS
Place_Keyword: Mississippi
Place_Keyword: West Ship Island
Place_Keyword: East Ship Island
Place_Keyword: Horn Island
Place_Keyword: Horn Island Pass
Place_Keyword: Camille Cut
Place_Keyword: Dog Keys
Place_Keyword: Dog Keys Pass
Place_Keyword: Petit Bois Island
Place_Keyword: Petit Bois Pass
Place_Keyword: Little Dog Keys Pass
Stratum:
Stratum_Keyword_Thesaurus: General
Stratum_Keyword: Water
Stratum_Keyword: shoreline
Temporal:
Temporal_Keyword_Thesaurus: General
Temporal_Keyword: July 2008
Temporal_Keyword: June 2009
Access_Constraints:
The U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data.
Use_Constraints: These data are not to be used for navigation.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nancy T. DeWitt
Contact_Organization:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747 x3058
Contact_Electronic_Mail_Address: ndewitt@usgs.gov
Data_Set_Credit:
Nancy T. DeWitt, James G. Flocks, Elizabeth A. Pendleton, Mark E. Hansen, B.J. Reynolds, Kyle W. Kelso, Dana S. Wiese, and Charles R. Worley.
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The accuracy of the data is determined during data collection. These datasets are from four speperate research cruises and are therefore internally consistent. Methods are employed to maintain data collection consistency aboard various platforms. During mobilization, each piece of equipment (single beam and swath) is isolated to obtain internal and external offset measurements with respect to the survey platform. All the critical measurements are recorded manually and digitally and entered into their respective programs for calibration. Once calibration is complete and calibration status is considered acceptable, then survey operations commence. Each system has a dedicated computer, and efforts are made to utilize the same equipment and software versions. However, upgrades and changes occur and require additional setup, measurements, and notation. For the single-beam bathymetry, offsets between the single-beam transducers and the Ashetch antenna reference point were measured and accounted for in post-processing. Bar checks were performed as calibration efforts and accounted for any drift in the Marimatech Echosounder, and Differential Geographic Positioning (DGPS) was obtained using post-processing software packages. For the swath bathymetry, offsets between the sonar head and the DGPS antennas were measured and entered into the F190 internal setup program. DGPS is normally provided through the OmniSTAR High Performance-wide area GPS service unless otherwise noted. DGPS is always implemented for navigational accuracy either during acquisition or as a post-processing step.
Logical_Consistency_Report:
This dataset was completed on four research cruises over the course of 21 days for 2008 and 20 days for 2009. Refer to the FACS logs for respective vessel platforms and survey information. This dataset was created as a visiual aid to show the vessel's path and make it available as a shapefile for furture use.
Completeness_Report:
These data provide a continuous and completed bathymetry trackline map for USGS cruises 08CCT01, 08CCT02, 09CCT03, and 09CCT04 as recorded in HYPACK version 4.3 (08CCT02 and 09CCT03) and 6.2 (08CCT01 and 09CCT04) . This is a complete representation of where the vessels surveyed. Trackline data location (x,y) was exported from HYPACK as a comma delimited file. Any erroneous data points or GPS jumps seen were deleted at this point. The comma delimited file was then imported into ArcMap version 9.3.1. An ArcScript downloaded from the ESRI Support Center Web site called Points to Lines was used to create a polyline from the data points and then converted into a shapefile.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
GPS base stations were erected within approximately 15 to 20 km of the survey area. Efforts were made to utilize pre-existing National Geodetic Survey (NGS) benchmarks on the islands. If pre-existing benchmarks were unavailable, a USGS benchmark was installed. Three NGS and two USGS base station locations were occupied for the 2008-2009 surveys. One local NGS Continuously Operating Reference Station (CORS) was used as a backup. All base station locations used were within a maximum of +/- 3.3 cm and a minimum of +/- 1.0 cm.
GPS was recorded using Ashtech Z-Xtreme GPS receivers that record the 12-channel full-carrier-phase positioning signals (L1/L2) from the satellites via the Thales choke-ring antenna. This GPS instrument combination is duplicated on the survey vessel (rover). The base receiver and the rover receiver record their positions concurrently at 1-second (s) recording intervals throughout the survey period. The differential navigation for the single-beam bathymetry and the swath bathymetry navigation were both collected in the same manner.
During swath acquisitions, operations DGPS is obtained using the CodaOctopus Octopus F190 Precision Attitude and Positioning System. The software used is F180 Series version 4.0.5. Two antennas received the integrated OmniSTAR High Performance differential correction. The software used is F180 Series version 4.0.5. The horizontal accuracy of bathymetric data is at the limit of OmniSTAR, a wide-area differential GPS service, which is within 20 cm. However, this navigation string was substituded for the post-processed external navigation between the base receiver and the rover receiver.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.001
Horizontal_Positional_Accuracy_Explanation: meters
Lineage:
Process_Step:
Process_Description:
This is a shapefile of the ship navigation as recorded using HYPACK version 4.3 and version 6.2. The shapefile was created in ArcMap version 9.3.1.
Process_Date: 2008 and 2009
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nancy T. DeWitt
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747 x3058
Contact_Electronic_Mail_Address: ndewitt@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 637
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 16
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -87.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000001
Ordinate_Resolution: 0.000001
Planar_Distance_Units: meters
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
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: 08_09_tracklines
Entity_Type_Definition: ArcMap 9.3 shapefile
Entity_Type_Definition_Source: ESRI ArcGIS 9.3
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI ArcGIS 9.3
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI ArcGIS 9.3
Attribute_Domain_Values:
Unrepresentable_Domain: Polyline defining the features.
Attribute:
Attribute_Label: line
Attribute_Definition: Name of trackline from aquisition and post-processing
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: ###_####
Codeset_Source:
First three numbers represent the number of the line and the last four numbers represent the time at which the line was acquired.
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: ####
Codeset_Source: Three or four consecutive numers represent the line name.
Attribute_Domain_Values:
Unrepresentable_Domain:
Trackline name in text format identifying what island it is from
Attribute:
Attribute_Label: year
Attribute_Definition: The year the tracklilne was surveyed
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2008
Range_Domain_Maximum: 2009
Attribute_Units_of_Measure: year
Attribute:
Attribute_Label: boat
Attribute_Definition: The survey platform that collected the trackline
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: cat
Enumerated_Domain_Value_Definition: RV Survey Cat
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: gil
Enumerated_Domain_Value_Definition: RV G.K.Gilbert
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: kinematicbuggy
Enumerated_Domain_Value_Definition: kinematic buggy
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: linetype
Attribute_Definition: the type of bathymetry collected along the trackline
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: singlebeam
Enumerated_Domain_Value_Definition: single beam bathymetry
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: swath
Enumerated_Domain_Value_Definition: swath bathymetry
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: kinematicbuggy
Enumerated_Domain_Value_Definition: shoreline survey
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: false
Enumerated_Domain_Value_Definition: false shoreline
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: length
Attribute_Definition: the track distance for a line segment
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.000773
Range_Domain_Maximum: 17.156905
Attribute_Units_of_Measure: kilometers
Attribute_Measurement_Resolution: 0.001
Overview_Description:
Entity_and_Attribute_Overview:
This is a shapefile of the ship navigation as recorded using HYPACK version 4.3 and version 6.2. The shapefile was created in ArcMap version 9.3.1.
Entity_and_Attribute_Detail_Citation: <http://ngom.usgs.gov/gomsc/mscip/>
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jim Flocks
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747 x3012
Contact_Electronic_Mail_Address: jflocks@usgs.gov
Resource_Description: Downloadable Data
Distribution_Liability:
This CD-ROM publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SHP
File_Decompression_Technique: no compression applied
Transfer_Size: 1.44
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <https://pubs.usgs.gov/ds/675>
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: CDR/DVD
Fees: none
Custom_Order_Process: none
Technical_Prerequisites: This shapefile was created for use with ESRI ArcGIS software.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2011
Time_of_Day: unknown
Metadata_Reference_Information:
Metadata_Date: 20110727
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nancy T. DeWitt
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747 x3058
Contact_Electronic_Mail_Address: ndewitt@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:
The U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data.
Metadata_Use_Constraints:
The U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data.
Metadata_Security_Information:
Metadata_Security_Classification_System: none
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: none
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.14 on Fri Dec 2 16:35:45 2011