U.S. Geological Survey Data Series 291

FGDC Metadata


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The metadata below pertain to the interferometric swath bathymetry data; metadata files for all data types can be found in the metadata folder.



Identification_Information:
Citation:
Citation_Information:
Originator: USGS - St. Petersburg Field Office
Originator: Kate T. Ciembronowicz
Originator: James G. Flocks
Originator: Dana S. Wiese
Originator: Nancy T. Dewitt
Originator: Nick F. Ferina
Originator: Lisa L. Robbins
Originator: Arnell S. Harrison
Publication_Date: 2007
Title:
Archive of side scan sonar and bathymetry data collected during USGS cruise 06FSH01 offshore of Siesta Key, Florida, May 2006.
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Series 291
Publication_Information:
Publisher: U.S. Geological Survey
Description:
Abstract:
This data set contains swath bathymetric data collected during USGS cruise 06FSH01 aboard the R/V G.K. Gilbert. A side scan sonar, bathymetric, and high-resolution seismic-reflection survey was conducted off Sarasota, FL to describe the relationship between the sediments and morphology of the inner shelf and adjacent shoreface. These data are part of the Florida Shelf Habitat (FLaSH) map project.
Purpose:
Part of an offshore site survey using high resolution geophysical mapping (seismic, side scan, and singlebeam bathymetery) techniques as part of the Florida Shelf Habitat (FLaSH) map project. More information at http://coastal.er.usgs.gov/flash.
Supplemental_Information:

In May of 2006, the U.S. Geological Survey conducted a geophysical survey offshore of Siesta Key, FL, as part of the USGS Florida Shelf Habitat (FLaSH) study, a multiagency benthic habitat mapping project. For more information refer to http://coastal.er.usgs.gov/flash/. This report serves as an archive of the processed side scan sonar mosaic, processed singlebeam and swath bathymetry images, processed x,y,z swath bathymetry data, trackline maps, navigation files, GIS files, Field Activity Collection System (FACS) logs, observer's logbook, and formal FGDC metadata. Scanned images of the handwritten FACS logs and handwritten science logbook (12 MB) are also provided as PDF files. Gridded and interpolated surface digital images of the bathymetry are also provided. Refer to the Acronyms page for expansion of acronyms and abbreviations used in this report.

The USGS Florida Integrated Science Center (FISC) - St. Petersburg assigns a unique identifier to each cruise or field activity. For example, 06FSH01 tells us the data were collected in 2006 for the Florida Shelf Habitat (FLaSH) 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.

Aboard the R/V G.K. Gilbert, side scan sonar and interferometric swath bathymetry data were collected simultaneously along the tracklines. The side scan sonar towfish was towed behind the vessel close to the seafloor. The interferometric swath transducer was pole mounted to the ship's hull. See the digital FACS equipment log (13 KB) for details about the acquisition equipment used. Both raw data sets were stored digitally and processed using CARIS software in the St. Petersburg office. For more detailed information on processing refer to the Equipment and Processing page. Postprocessing of the swath data set revealed a motion artifact which is attributed to movement of the pole in relation to the boat. Due to scheduling constraints, the survey was forced to take place in less than ideal weather conditions, which caused 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 amplitude data.

In addition, singlebeam bathymetry was collected aboard the R/V Streeterville using SANDS, which is a singlebeam acoustic sounding GPS-based hydrographic data collection and processing system. Differential boat position was recorded using GPS referenced to a land-based benchmark which is occupied throughout the survey. Boat position, boat motion (heave, pitch, and roll), and depth readings are collected and stored in real time on the vessel and are later merged with the DGPS information using time correlations. For more detailed information on processing refer to the Equipment and Processing page. CHIRP data were also collected during the survey and are archived separately in Data Series 254 and can be downloaded at https://pubs.usgs.gov/ds/2007/254.

Time_Period_of_Content:
Time_Period_Information:
Beginning_Date: May 10, 2006
Ending_Date: May 15, 2006
Calendar_Date: unknown
Currentness_Reference: Data collection interval
Status:
Progress: In work
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -82.630113
East_Bounding_Coordinate: -82.514193
North_Bounding_Coordinate: 27.267895
South_Bounding_Coordinate: 27.178480
Keywords:
Theme:
Theme_Keyword: swath bathymetry
Theme_Keyword: seafloor mapping
Theme_Keyword: interferometry
Theme_Keyword: Florida shelf habitat map
Theme_Keyword: USGS
Place:
Place_Keyword: Siesta Key
Place_Keyword: Sarasota, FL
Place_Keyword: Eastern Gulf of Mexico
Place_Keyword: West-central Florida
Access_Constraints:
The U.S. Geological Survey must be referenced as the originator of this data set 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_Organization_Primary:
Contact_Organization: USGS St. Petersburg Field Office
Contact_Person: Dana Wiese
Contact_Address:
Address_Type: mailing address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727.803.8747 x3051
Contact_Facsimile_Telephone: 727.803.2000
Contact_Electronic_Mail_Address: dwiese@usgs.gov
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The data set is from a single cruise and collection platform, therefore is internally consistent. All data were aquired with a SEA, Ltd. SWATHplus interferometric sonar. Postprocessing of the swath data set revealed a motion artifact which is attributed to movement of the pole in relation to the boat. Due to scheduling constraints, the survey was forced to take place in less then ideal weather conditions, which caused 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 amplitude data.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The ship was navigated with DGPS using two antennas and integrated Omnistar/Seastar differential correction. Unless noted all DGPS data are referenced to WGS84 (NAD 83). The fathometer is mounted on the starboard side of the vessel. Offset between the sonar head and the DGPS antenna were measured, and the horizontal accuracy of bathymetric data is within +/- 1-2 m. Motion of the fathometer is not measured.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: +/- 1-2 m
Horizontal_Positional_Accuracy_Explanation: assumed accuracy of DGPS
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Ship motion was measured using a Coda Octopus F190 motion sensor and gyro with dual frequency GPS and integral satellite differential receiver. The interferometric sonar is an angle-measuring system; depth accuracy decreases with increasing horizontal range. The swath width of the interferometric sonar varied as a function of depth but generally achieved 7- 10 times the water depth. Vertical accuracy is directly affected by the accuracy of both the navigation system and tidal measurments.
Lineage:
Process_Step:
Process_Description:
The raw Submetrix data (sxp files) were processed using CARIS HIPS v. 6.0. A single value sound velocity profile was applied using 1,538.0 m/s. A tide correction was applied using verified tidal data from the NOAA station at Clearwater Beach, FL (#8726724), and referenced to Mean Lower Low Water (MLLW). The Swath Editor within the HIPS package was used to edit the data on a ping-by-ping basis, in both the across- and along-track dimension. Spurious or erroneous data were removed. The navigation and attitude data were also graphically exmined for each line of data. The HIPS software was used to create a BASE surface similar to a weighted grid at 5-m grid cell size. The 5-m gridded data were then exported to an x,y,z ASCII file.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Kate Ciembronowicz
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: Saint Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727.803.8747 x3124
Contact_Facsimile_Telephone: 727.803.2000
Contact_Electronic_Mail_Address: kciembro@usgs.gov
Process_Step:
Process_Description:
The 5-m x,y,z ASCII data were imported into ESRI ArcGIS version 9.1 software using the ASCII to GRID command. An ordinary kriging interpolation was used in order to generate a continuous bathymetric surface from the interferometric sonar data. This surface was exported to raster using a default cell size of 32. This file is named raster_cell32.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Kate Ciembronowicz
Contact_Organization:
U.S. Geological Survey, Florida Integrated Science Center, St. Petersburg, FL
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: Saint Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727.803.8747 x3124
Contact_Facsimile_Telephone: 727.803.2000
Contact_Electronic_Mail_Address: kciembro@usgs.gov

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 48
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 300
Column_Count: 349
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: 17
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -81.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 32.550000
Ordinate_Resolution: 32.550000
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: 298.257224
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_Distance_Units: meters
Depth_Encoding_Method: attribute values

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Band_1
Entity_Type_Definition: Interferometric sonar data
Attribute:
Attribute_Label: ObjectID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Value
Attribute:
Attribute_Label: Red
Attribute:
Attribute_Label: Green
Attribute:
Attribute_Label: Blue
Overview_Description:
Entity_and_Attribute_Overview:
The data were collected using a Submetrix 234-kHz interferometric swath sonar. Offsets and gyro data were added to the raw files (.swc and .sxr) creating .sxp files.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: Florida
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727.803.8747
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, or for general or scientific purposes, 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 therein. Reference therein 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: ESRI_Grid
Format_Version_Number: ArcGIS 9.1
Format_Specification: ESRI Grid file
Format_Information_Content:
Grid containing swath bathymetric data collected offshore Sarasota, FL
File_Decompression_Technique: no compression applied
Transfer_Size: 0.420

Metadata_Reference_Information:
Metadata_Date: 20070803
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Arnell Harrison
Contact_Organization: USGS FISC
Contact_Position: Geologist
Contact_Address:
Address_Type: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727.803.8747 x3111
Contact_Facsimile_Telephone: 727.803.2032
Contact_Electronic_Mail_Address: aharrison@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 must be referenced as the originator of this data set in any future products or research derived from these data.
Metadata_Use_Constraints: none
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile

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