tmunro_50m_dd.tif - 50-meter color-shaded relief image produced from swath bathymetry collected by the U.S. Geological Survey in Woods Hole, MA and St. Petersburg, FL offshore of the Gulf Islands, MS, 2010 (Geographic GeoTIFF)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2011
Title:
tmunro_50m_dd.tif - 50-meter color-shaded relief image produced from swath bathymetry collected by the U.S. Geological Survey in Woods Hole, MA and St. Petersburg, FL offshore of the Gulf Islands, MS, 2010 (Geographic GeoTIFF)
Edition: 1.0
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2010-1178
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage:
<https://pubs.usgs.gov/of/2010/1178/GIS_catalog/Bathy/bathy_tif.zip>
Larger_Work_Citation:
Citation_Information:
Originator: Elizabeth A. Pendleton
Originator: Wayne E. Baldwin
Originator: William W. Danforth
Originator: Nancy T. Dewitt
Originator: Arnell S. Forde
Originator: David S. Foster
Originator: Kyle W. Kelso
Originator: William R. Pfeiffer
Originator: Aaron M. Turecek
Originator: James G. Flocks
Originator: David C. Twichell
Publication_Date: 2011
Title:
Geophysical Data from offshore of the Gulf Islands National Seashore, Cat Island to Western Horn Island, Mississippi
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2010-1178
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <https://pubs.usgs.gov/of/2010/1178/>
Description:
Abstract:
In 2010, the U.S. Geological Survey in Woods Hole, MA and St. Petersburg, FL, in partnership with the U.S. Army Corps of Engineers, Mobile District conducted geologic mapping to characterize the seafloor and shallow subsurface stratigraphy offshore of the Gulf Islands of Mississippi. The mapping was carried out during two cruises in March, 2010 on the R/V Tommy Munro of Biloxi, MS. Data were acquired with the following equipment: an SEA Ltd SwathPlus interferometric sonar (both 234 kHz and 468 kHz systems), a Klein 3000 and a Klein 3900 dual frequency sidescan-sonar, and an Edgetech 512i chirp subbottom profiling system. The long-term goal of this mapping effort is to produce high-quality, high-resolution geologic maps and geophysical interpretations that can be utilized to identify sand resources within the region and better understand the Holocene evolution and anticipate future changes in this coastal system. More information on the field work can be accessed from the Woods Hole Coastal and Marine Science Center Field Activity webpage <http://quashnet.er.usgs.gov/data/2010/10012/> or the St. Petersburg Coastal and Marine Geology InfoBank <http://walrus.wr.usgs.gov/infobank/m/m210gm/html/m-2-10-gm.meta.html>.
Purpose:
This color shaded-relief GeoTIFF image represents approximately 270 square km of bathymetric data that were collected in 2010. These data are used to define the sea-floor morphology offshore of the Gulf Islands in Mississippi.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20100304
Ending_Date: 20100329
Currentness_Reference:
Data were not collected on 20100310, 20100312-20100314, 20100318, and 20100321-20100326 due to weather conditions, crew changes, or survey location.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.083910
East_Bounding_Coordinate: -88.634897
North_Bounding_Coordinate: 30.231222
South_Bounding_Coordinate: 30.125218
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: bathymetry
Theme_Keyword: swath bathymetry
Theme_Keyword: interferometry
Theme_Keyword: sea-floor morphology
Theme_Keyword: WHCMSC field activity serial number 2010-012-FA
Theme_Keyword: Geographic GeoTIFF
Theme_Keyword: St. Petersburg Coastal and Marine Science Center
Theme_Keyword: R/V Tommy Munro
Theme_Keyword: St. Petersburg field activity serial number 10cct02
Theme_Keyword: Hillshade relief
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: oceans and coastal
Theme_Keyword: oceans and estuaries
Theme_Keyword: elevation
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Mississippi
Place_Keyword: Gulf Islands
Place_Keyword: North Central Gulf Coast
Place_Keyword: United States
Place_Keyword: West Ship Island
Place_Keyword: East Ship Island
Place_Keyword: Horn Island
Place_Keyword: Dog Key Pass
Place_Keyword: Camille Cut
Place_Keyword: Petit Bois Island
Place_Keyword: Gulfport Ship Channel
Place_Keyword: Gulf of Mexico
Place_Keyword: Cat Island
Access_Constraints: None
Use_Constraints:
Not to be used for navigation. The Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David C. Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700x2266
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dtwichell@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
<https://pubs.usgs.gov/of/2010/1178/GIS_catalog/Bathy/bathy_tiff.png>
Browse_Graphic_File_Description:
50-m swath bathymetric gray-scale shaded relief image of offshore of the Gulf Islands, MS
Browse_Graphic_File_Type: PNG
Native_Data_Set_Environment:
Microsoft Windows XP Professional x64 Edition Version 2003 Service Pack 2; ESRI ArcCatalog 9.3 Build 1770
Cross_Reference:
Citation_Information:
Originator: Lijuan Huang
Publication_Date: 20100226
Title: NOAA/NOS Hydrographic Planning Team (HPT) tide zone model
Online_Linkage: <http://www.tidesandcurrents.noaa.gov/hydro.html>
Cross_Reference:
Citation_Information:
Originator: J. F. Luis
Publication_Date: 2007
Title: Mirone: A multi-purpose tool for exploring grid data.
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Computers and Geosciences
Issue_Identification: 33
Publication_Information:
Publication_Place: Amsterdam
Publisher: Elsevier
Online_Linkage: <https://dx.doi.org/10.1016/j.cageo.2006.05.005>
Cross_Reference:
Citation_Information:
Originator: P. Wessel
Originator: W.H.F. Smith
Publication_Date: 1998
Title: New, improved version of the Generic Mapping Tools released
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: EOS Transactions
Issue_Identification: 79
Publication_Information:
Publication_Place: Washington, DC
Publisher: American Geophysical Union
Online_Linkage: <http://gmt.soest.hawaii.edu/>
Data_Quality_Information:
Logical_Consistency_Report: Any spurious data points were removed during processing.
Completeness_Report:
All shore parallel survey lines were incorporated. Tie (shore perpendicular) lines were not used in grid generation. The R/V Tommy Munro was contracted for the month of March 2010. The Woods Hole Coastal and Marine Science Center acquired data onboard between March 4 and March 17, 2010. Bathy data were acquired on 20100304-20100309; 20100311;20100315-20100317. Day gaps in acquisition were due to inclement weather or seismic tieline acquisition. The St. Petersburg Coastal and Marine Science Center acquired data onboard the R/V Tommy Munro between March 19 and March 29, 2010. Bathy data for this dataset were acquired on 201003019-20100320; 20100327-2010329. Day gaps in acquisition were due to inclement weather or data acquisition in another study area.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
These data were navigated with a Differential Global Positioning System (DGPS); they are accurate to + or - 1 to 2 meters, horizontally. Unless noted, all DGPS data are referenced to WGS84, and distance between sidemounted interferometric sonar and GPS antennae are corrected.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The theoretical vertical resolution of the SEA Ltd SwathPlus interferometric sonar is 1 % of water depth, approximately 0.1 m within the study area. An Octopus F180 Attitude and Positioning system was used to correct for vessel roll, pitch, heave, and yaw during the first leg, 2010-012FA, whereas an Octopus F190 Attitude and Positioning system was used during the second leg, 10cct02. Tidal offsets were corrected with a NOAA tide zone model and referenced to mean lower low water (MLLW). Errors associated with the tidal zone model could be less than or equal to the tidal range for this area which is ~0.4 m. The gridding algorithm and cell size used on these data could introduce errors as great as 3 m along the edges of the Gulfport Ship Channel. Gridding-induced errors are likely much smaller (< 0.5 m) for most of the study area where slopes are less than 1 degree. Changes in ship draft due to water and fuel usage were not considered.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20100304
Ending_Date: 20100329
Source_Currentness_Reference:
Data were not collected on 20100310, 20100312-20100314, 20100318, and 20100321-20100326 due to weather conditions, crew changes, or survey location.
Source_Contribution:
Swath data acquisition at sea (2010): These bathymetric data were collected with 2 SEA Ltd Swathplus interferometric sonars (a 234 kHz and a 468 kHz system) mounted on the portside of the R/V Tommy Munro of Biloxi, MS. The WHCMSC acquired data with the 234 kHz system between March 4, 2010 and March 17, 2010. The St. Petersburg Coastal and Marine Science Center acquired data with the 468 kHz system between March 19, 2010 and March 29, 2010. All data were acquired with SwathPlus Software (version: 3.6.5). Tracklines are spaced 150 m apart in the shore parallel direction.
Process_Step:
Process_Description:
SwathPlus Software (version: 3.7.0) was used to acquire the raw swath data (*.sxr) and output a processed soundings file (*.sxp). Several bathy filters were applied to the processed file within SwathPlus to remove erroneous soundings and reduce the density of the data. Corrections were also applied for speed of sound changes (using sound velocity profiles), ship motion, GPS antennae offsets, and transducer depth and angle below the surface. Bathy filters included a low amplitude (100), range (1-m below the surface), box (2-m to avoid nadir), alongtrack 1 (depth difference of 10-m, window size 10-m, and learn rate of 0.6), alongtrack 2 (depth difference of 1-m, window size 1-m, and learn rate of 0.9), and a mean filter (0.1-m).
Process_Date: 2010
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
CARIS (version: HIPS and SIPS 6.1; service pack 2) was used to import the processed bathy files (*.sxp) from SwathPlus format to CARIS HDCS data format using the conversion utility. The data were corrected for errors in soundings due to additional sound refraction not accounted for by sound velocity profiles using the CARIS refraction editor. These artifacts can be recognized in a cross-swath profile of a relatively flat patch of sea floor. When viewing the swath data across a profile, the sea floor will appear to have a "frown" or "smile" when in fact the data should be flat across the profile. Insufficient and/or erroneous sound velocity information, which is usually due to too widely spaced or non-existent velocity profiles within an area, results in an under or over-estimate of water depth which increases with distance from the center of the swath. The bathymetric data were also corrected to mean lower low water (MLLW) using a discrete tidal-zoning model (DTZ) developed by NOAA/NOS's Hydrographic Planning Team (Huang, personal communication, 2010) (<http://www.tidesandcurrents.noaa.gov/hydro.html>). The DTZ model corrects differences in tidal phase and amplitude between the survey area and observations made at NOS tide gauges at Gulfport Harbor (8745557) and Pascagoula NOAA Lab (8741533). The tidal zone models were imported into CARIS (version: HIPS and SIPS 6.1) as text files and used to correct tidal observations for each survey. Once the tidal zone model was imported into CARIS using the tide editor, the tidal range and phase offsets were applied and remerged in CARIS(version: HIPS and SIPS 6.1), making all the soundings relative to MLLW. A 5-meter base surface of tide corrected bathymetric soundings was created in CARIS, then exported as ASCII x,y,z data.
Process_Date: 2010
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
The 5-m ASCII x,y,z file (for each cruise; St. Pete and WHCMSC) was gridded in GMT (version: 4.2.1; Wessel and Smith, 1998) using 'blockmedian' with a cell size of 50 meters. This routine was conducted to minimize edge effects in the 'surface' gridding routine because these data were collected at approximately 40-50% seafloor coverage. Next a tension spline routine (at 0.1) in GMT was used ('surface') to create a netCDF grid.
Process_Date: 2010
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
The GMT grid (*.grd) was then converted to an ESRI Binary Grid via Mirone (version 1.5.0; Luis, 2007) and MATLAB R2007b (version 7.5.0.342) - save grid as - ArcGIS binary grid. The projection was defined in ArcMap (version: 9.3) using Data Management Tools - Projections and Transformations - Define Projection: UTM, zone 16N, WGS84 Datum. This grid was then reprojected with ArcToolbox (Data Management Tools - Projections and Transformations - Raster - Project Raster) to create a grid in geographic coordinate system WGS84.
Process_Date: 20100812
Process_Time: 14204900
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Contact_Voice_Telephone: (508)-548-8700 x2259
Contact_Facsimile_Telephone: (508)-457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
The geographic coordinate system (WGS84) 50-m bathymetric grid was imported into MATLAB using a toolbox called Mirone (version 1.5.0; Luis, 2007). This toolbox allows for the import of several geospatial data types including ESRI binary grid format. The grid was then hillshaded in Mirone using the Illuminate function (i.e. gmt grdgradient) with an azimuth of 350 and an altitude of 45. A z-factor (vertical exagerration) of 10 was used to create a broader range of grey-scale values. The grid was then exported as a GeoTIFF in Mirone.
Process_Date: 20100812
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: (508)-548-8700 x2259
Contact_Facsimile_Telephone: (508)-457-2310
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 212
Column_Count: 898
Vertical_Count: 1
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0005
Longitude_Resolution: 0.0005
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: NODATA is represented by white (255-255-255).
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: WinZip
Format_Version_Number: 14.5
Format_Information_Content:
This WinZip file contains a GeoTIFF image of the bathymetry offshore of the Gulf Islands, MS, and the associated metadata.
File_Decompression_Technique: Use WinZip or pkUnzip
Transfer_Size: 310 KB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<https://pubs.usgs.gov/of/2010/1178/GIS_catalog/Bathy/bathy_tif.zip>
Access_Instructions: Data can be downloaded via the World Wide Web (WWW)
Offline_Option:
Offline_Media: DVD-ROM
Recording_Capacity:
Recording_Density: 4.75
Recording_Density_Units: Gbytes
Recording_Format: UDF
Fees: None
Technical_Prerequisites:
The image contained in the zip file is available as a GeoTIFF. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image.
Metadata_Reference_Information:
Metadata_Date: 20110429
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
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: 508-548-8700 x2259
Contact_Facsimile_Telephone: (508)-457-2310
Contact_Electronic_Mail_Address: ependleton@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: None
Metadata_Use_Constraints: None
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.14 on Fri Apr 29 14:59:49 2011