10cct01_v2_ss_1m_b.tif

Metadata also available as

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: William R. Pfeiffer
Originator: Dana S. Wiese
Publication_Date: 2010
Publication_Time: 2010
Title: 10cct01_v2_ss_1m_b.tif
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: USGS Data Series Publication
Issue_Identification: DS563
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Other_Citation_Details:
Data Series 563 File Name = 10cct01_v2_ss_1m_b.tif
Online_Linkage: <https://pubs.usgs.gov/ds/563>#
Description:
Abstract:
In March of 2010, the U.S. Geological Survey (USGS) conducted geophysical surveys east of Cat Island, Mississippi. The efforts were part of the USGS Gulf of Mexico Science Coordination partnership with the U. S. Army Corps of Engineers (USACE) to assist the Mississippi Coastal Improvements Program (MsCIP) and the Northern Gulf of Mexico (NGOM) Ecosystem Change and Hazards Susceptibility Project by mapping the shallow geological stratigraphic framework of the Mississippi Barrier Island Complex. The data collected will be used to create baseline bathymetry information that will address seafloor change. This report contains swath bathymetry and side scan sonar data collected aboard the R/V Survey Cat during Cruise 10CCT01. A combination of software packages was used to process and grid the data. This data series describes the methodology used and the resulting data projects.
Purpose:
This report serves as an archive of the processed swath bathymetry and side scan sonar data. Data products herein include gridded and interpolated surfaces, surface images, and x,y,z data products for both swath bathymetry and side scan sonar imagery. Additional files include trackline maps, navigation files, 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:
These 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 will provide information for barrier island restoration, particularly in Camille Cut, and provide protection for the historical Fort Massachusetts. For more information refer to <http://ngom.usgs.gov/gomsc/mscip/>.
The USGS St. Petersburg Coastal and Marine Science Center assigns a unique identifier to each cruise or field activity. For example, 10CCT01 tells us the data were collected in 2010 for the Coastal Change and Transport (CCT) study and the data were collected during the first field activity for that project in that calendar year. Refer to <http://walrus.wr.usgs.gov/infobank/programs/html/definition/activity.html> for a detailed description of the method used to assign the field activity ID.
Data were collected using a 26-foot Glacier Bay Catamaran. Side scan sonar and interferometric swath bathymetry data were collected simultaneously along the tracklines. The side scan sonar towfish was towed off the port side just slightly behind the vessel, close to the seafloor. The interferometric swath transducer was sled-mounted on a rail attached between the catamaran hulls. During the survey the sled is secured into position. Navigation was acquired with a CodaOctopus Octopus F190 Precision Attitude and Positioning System and differentially corrected with OmniSTAR. See the digital FACS equipment log for details about the acquisition equipment used. Both raw datasets were stored digitally and processed using SEA's Ltd. Swath Processor version 3.07 and CARIS HIPS and SIPS software version 7.0 in the St. Petersburg office. For more information on processing, refer to the Equipment and Processing page. Post-processing of the swath dataset revealed a motion artifact that is attributed to movement of the pole that the transducers are attached to in relation to the boat. The survey was forced to take place in the winter months, in which strong winds and rough waves contributed to a reduction in data quality. The rough seas contributed to both the movement of the pole and the very high noise base seen in the raw amplitude data of the side scan sonar. Chirp data were also collected during this survey and are archived separately.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20100309
Beginning_Time: unknown
Ending_Date: 20100317
Ending_Time: unknown
Currentness_Reference: data collection interval
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.098401
East_Bounding_Coordinate: -88.933079
North_Bounding_Coordinate: 30.286023
South_Bounding_Coordinate: 30.200723
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: trackline
Theme_Keyword: side scan sonar
Theme_Keyword: bathymetry
Theme_Keyword: USGS
Theme_Keyword: side scan sonar mosaic
Theme_Keyword: Klein 3900
Theme_Keyword: GeoTIFF
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: GUIS
Place_Keyword: Mississippi
Place_Keyword: Cat Island
Place_Keyword: West Ship Island
Place_Keyword: Gulfport Ship Channel
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: Water
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: March 2010
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, William R. Pfeiffer, Jim Flocks, Dana Wiese
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. This dataset is from a single cruise and therefore internally consistent. Methods are employed to maintain data collection consistency aboard various platforms. During mobilization, each piece of equipment (swath and sonar) 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. The swath transducer sonar head was sled-mounted between the catamaran pontoons. Offsets between the sonar head and the DGPS antennas were measured and entered into the F190 internal setup program. DGPS is always implemented for navigational accuracy. DGPS is normally provided through the OmniSTAR High Performance wide area GPS service unless otherwise noted. All swath bathymetry data was collected using the SEA Ltd., SWATHplus interferometric sonar system. All side scan sonar data was collected using the Klein 3900 system.
Logical_Consistency_Report:
This dataset was completed on a single and continuous cruise over four days from the same research vessel platform.
Completeness_Report:
This is a complete processed side scan socar mosaic in GeoTIFF format. This data provides a continuous and complete surface, however there may in some cases be data missing and inconsistent with reported tracklines. This is directly due to the exclusion of poor data, instrument failures.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The ship was navigated using Differential Global Positioning System (DGPS) obtained with the CodaOctopus Octopus F190 Precision Attitude and Positioning System using the F190 Windows software version 4.0.5. Two antennas received the integrated OmniSTAR differential correction. Unless noted, all DGPS data are referenced to WGS84. The swath transducer sonar head was sled-mounted between the catamaran pontoons. Offsets between the sonar head and the DGPS antennas were measured and entered into the F190 internal setup program. The horizontal accuracy of side scan sonar data is at the limit of OmniSTAR, which is within 20 cm.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 20
Horizontal_Positional_Accuracy_Explanation: centimeters
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The towfish altitude varied considerably during the cruises due to the nature of shallow-water surveying operations. Ideally, SSS is flown at a relatively considerable distance from the vessel and other instruments to avoid acoustical interference. Typical sources of acoustical interference are vessel vibrations and other instruments such as sub-bottom profilers and interferometric swath systems that utilize similar frequency ranges. However, in shallow-water surveying the optimal distance is difficult to achieve due to the negative buoyancy of the towfish and the effect of unanticipated isolated shoals.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: 1
Vertical_Positional_Accuracy_Explanation: meter
Lineage:
Process_Step:
Process_Description:
The XTF files collected were converted into CARIS HIPS and SIPS version 7.0 data format structure called Sonar Information Processing System (SIPS) for the purpose of editing and sidescan mosaic creation. All horizontal positions were offset relative to a central ship navigation point. The first step in SSS data processing was to correct the altitude, or first return. This was achieved by a combination of auto-prediction parameters set and manual boundary digitization of the water column and seafloor. The second step was application of the beam pattern correction, which was accomplished by sampling a series of beams over homogeneous surface content. The purpose of beam pattern correction is to identify and offset the inherent instrument intensity variance as the across-track range increases. Near nadir the acoustic return is significantly more intense and decreases as across-track range increases. These phenomena result in a false high intensity value strip along the centerline of the SSS swath. Several other SSS editing tools were used, including angle-varying gain and time-varied gain corrections, which were used to further smooth the resulting intensity range artifacts, offering a more consistent along- and across-track image. The despeckle editing tool was also employed to identify and mute isolated pixels having extreme high or low intensity valueds relative to adjacent pixels. After all the individual sidescan lines were examined and edited, Geo-referenced Backscatter Rasters (GeoBars) were created. For this dataset a resolution of 1-m was chosen. From the series of GeoBars, a sidescan mosaic image was generated as a composite of the GeoBars, which also provides for a continuous image of a single intensity value range for geographic comparison.
Process_Date: 2010
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William R. Pfeiffer
Contact_Organization: Jacobs Technology Inc., Tampa, FL
Contact_Position: Data Analyst
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 x3134
Contact_Electronic_Mail_Address: wpfeiffer@usgs.gov
Process_Step:
Process_Description:
Created a text file that combined the swath bathymetry from GeoTIFF file 10cct01_v2rbf_50m.tif with the side scan sonar amplitude intensity from GeoTIFF file 10cct01_v2_ss_b.tif. This was done using ArcMAP version 9.3.1 Spatial Analyst tool. The swath bathymetry and side scan files were combined and then extracted into a table format (DBF) using Spatial Analyst extraction by sample. This table was then exported as a text file named 10cct01_xyzi.txt using XTools Pro version 6.0 export table to text
Process_Date: 2010
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: William R. Pfeiffer
Contact_Organization: Jacobs Technology Inc., Tampa, FL
Contact_Position: Data Analyst
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 x3134
Contact_Electronic_Mail_Address: wpfeiffer@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 9179
Column_Count: 15753
Vertical_Count: 1
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: 1.000000
Ordinate_Resolution: 1.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.25722356300003
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Mean lower low water
Depth_Resolution: 1
Depth_Distance_Units: meters
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: 10cct01_v2_ss_1m_b.tif
Entity_Type_Definition: ESRI ArcGIS 9.3
Entity_Type_Definition_Source: ESRI ArcMap 9.3.1 GeoTIFF
Attribute:
Attribute_Label: X
Attribute_Definition: WGS84 UTM 16N
Attribute_Definition_Source: World Geodetic System of 1984
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 301905
Range_Domain_Maximum: 309305
Attribute:
Attribute_Label: Y
Attribute_Definition: WGS84 UTM 16N
Attribute_Definition_Source: World Geodetic System of 1984
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 3348375
Range_Domain_Maximum: 3351925
Attribute:
Attribute_Label: Z
Attribute_Definition: Coordinate
Attribute_Definition_Source: ESRI ArcGIS 9.3
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -12.60
Range_Domain_Maximum: -2.40
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: I
Attribute_Definition: Amplitude Intensity Value
Attribute_Definition_Source:
Klein 3900 Side Scan Sonar System measures backscatter as amplitude intensity.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 255
Overview_Description:
Entity_and_Attribute_Overview:
The processed side scan sonar TIFF file is 10cct01_v2_ss_1m_b.tif. From this file a text file was created called 10cct01_xyzi.txt the attributes of which are listed below.
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 DVD 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.
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: 10cct01_v2_ss_1m_b.tif
Format_Version_Number: TIFF
File_Decompression_Technique: no compression applied
Transfer_Size: 65.8
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <https://pubs.usgs.gov/ds/563>#
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: CDR/DVD
Digital_Form:
Digital_Transfer_Information:
Format_Name: 10cct01_xyzi.txt
Format_Version_Number: text
Transfer_Size: 0.193
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <https://pubs.usgs.gov/ds/563>#
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: 2010
Time_of_Day: unknown
Metadata_Reference_Information:
Metadata_Date: 20101117
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 request 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 request 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
Generated by mp version 2.9.6 on Thu Nov 18 14:19:55 2010