High Resolution Bathymetric Mapping

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Mark Hansen

Gary W. Hill; Nancy T. DeWitt

Publication_Date: 2002

Title: High Resolution Bathymetric Mapping

Geospatial_Data_Presentation_Form: project, maps and data

Online_Linkage:

<http://sofia.usgs.gov/projects/index.php?project_url=hires_bathy_lakeo>

Description:

Abstract:

The water levels in Lake Okeechobee were at record low levels in the summer of 2001 making hydrographic surveying ideal in that less area must be covered by boat to fully map the lake floor. This condition also allowed the upper elevations of the lake, which were now exposed, to be mapped by traditional survey techniques or airborne topographic LIDAR technology. Conversely, due to the very flat slope of the lake floor, much of the lakebed was less than 0.6m (2') deep making surveying by any method very difficult at best.

Purpose:

High resolution, acoustic bathymetric surveying is a proven method to map sea and lake floor elevations. Of primary interest to the South Florida Water Management District (SFWMD) is the quantification of the present day lakebed in Lake Okeechobee. This information can be used by water management decision-makers to better assess the water capacity of the lake at various levels.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 200109

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -81.125

East_Bounding_Coordinate: -80.5

North_Bounding_Coordinate: 27.25

South_Bounding_Coordinate: 26.625

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: bathymetry

Theme_Keyword: mapping

Theme_Keyword: geography

Theme_Keyword: hydrogeology

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: environment

Theme_Keyword: geoscientificInformation

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: inlandWaters

Theme_Keyword: 007

Theme_Keyword: 008

Theme_Keyword: 010

Theme_Keyword: 012

Place:

Place_Keyword_Thesaurus:

Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions, Federal Information Processing Standard (FIPS) 10-4, Washington, DC, National Institute of Standards and Technology

Place_Keyword: United States

Place_Keyword: US

Place:

Place_Keyword_Thesaurus:

U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, DC, NIST

Place_Keyword: Florida

Place_Keyword: FL

Place:

Place_Keyword_Thesaurus:

Department of Commerce, 1990, Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS 6-3, Washington, DC, National Institute of Standards and Technology

Place_Keyword: Martin County

Place_Keyword: Palm Beach County

Place_Keyword: Glades County

Place_Keyword: Hendry County

Place_Keyword: Okeechobee County

Place:

Place_Keyword_Thesaurus: USGS Geographic Names Information System

Place_Keyword: Lake Okeechobee

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Greater Lake Okeechobee

Access_Constraints: none

Use_Constraints: none

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Mark Hansen

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address

Address: 600 Fourth Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: 727 803-8747 x 3036

Contact_Facsimile_Telephone: 727 803-2030

Contact_Electronic_Mail_Address: mhansen@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

<http://sofia.usgs.gov/publications/maps/lakeokeebathy/index.html>

Browse_Graphic_File_Description: satellite image showing Lake Okeechobee bathymetric contours

Browse_Graphic_File_Type: JPEG

Data_Set_Credit:

The South Florida Water Management District (SFWMD) provided partial funding for this project

Native_Data_Set_Environment: text files, JPEG and PDF map files

Cross_Reference:

Citation_Information:

Originator:

Hill, Gary W.

DeWitt, Nancy T; Hansen, Mark

Publication_Date: 2001

Title: Elevation Contours of Lake Okeechobee

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: St. Petersburg, FL

Publisher: U.S. Geological Survey

Other_Citation_Details: accessed as of 12/28/2010

Online_Linkage: <http://sofia.usgs.gov/publications/maps/lakeokeebathy/>

Data_Quality_Information:

Logical_Consistency_Report: unavailable

Completeness_Report: unknown

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Boat position measured using precise differential GPS receivers. Horizontal accuracy is +/- 4 cm (1.6in)

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Dynamic elevation measured using precise differential GPS receivers. Vertical accuracy is +/- 8 cm (3 in).

Lineage:

Process_Step:

Process_Description:

The USGS:

1. Provided equipment and personnel as necessary to conduct high resolution bathymetric surveying for a minimum of 1550 kilometers.

The USGS has developed a hydrographic survey system specifically designed to map in very shallow water. A survey quality 200 kHz depth sounder was used to acquire water depth measurements and a motion sensor measured heave, pitch, and roll of the boat. A measurement was collected every second or about every 3 m (10 ft) along a survey line. To achieve horizontal accuracy of +/- 4 cm (1.6 in) and vertical accuracy of +/- 8cm (3 in), the boat could not be operated more than 20 km from any one GPS base station. It was anticipated that two GPS base stations would be used. Several new survey benchmarks were established around the lake perimeter for GPS base station occupation.

Survey track line spacing was 1000 m apart oriented in a north-south direction. A perimeter survey line and several east-west lines were collected also. In addition random crossing lines were collected daily. Crossing lines were used to crosscheck and verify the survey. Soundings were collected along each track line at 3 m (10 ft) spacing. A minimum of 1550 kilometers of survey line were collected. In shallow areas, data were collected in a minimum of 2 feet water depth except where there was potential damage to the bottom environment or the boat/motors.

2. Provided post processing of the benchmark and hydrographic data.

3. Stored and maintained all data and provide access to this data for reproduction as needed by the SFWMD.

4. Provided a final data package that included the following: a. Hard copy plot of locations of surveyed tracklines. b. Digital ASCII XYZ data in UTM Zone 17, GRS80/NAD83 horizontal coordinates, and NAVD88 vertical coordinates in tabular format. c. Copies of raw and processed digital data files on CD-ROM

Process_Date: 2002

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Mark Hansen

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address

Address: 600 Fourth Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: 727 803-8747 x 3036

Contact_Facsimile_Telephone: 727 803-2030

Contact_Electronic_Mail_Address: mhansen@usgs.gov

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: Lake Okeechobee

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.00000001

Longitude_Resolution: 0.00000001

Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.257

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988

Altitude_Resolution: 1.0, 0.5

Altitude_Distance_Units: feet, meters

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

Data in the "raw data" files are in the following format:

Col 1 Longitude Col 2 Latitude Col 3 X State Plane (ft) Florida East Zone Col 4 Y State Plane (ft) Florida East Zone Col 5 VERTCON corrections factor (m) Col 6 Elevation (m) - NAVD88 Col 7 Elevation (ft) - NAVD88 Col 8 Elevation (m) - NGVD29 Col 9 Elevation (ft) - NGVD29

Entity_and_Attribute_Detail_Citation: USGS personnel

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Heather S. Henkel

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing address

Address: 600 Fourth St. South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: 727 803-8747 ext 3028

Contact_Facsimile_Telephone: 727 803-2030

Contact_Electronic_Mail_Address: hhenkel@usgs.gov

Resource_Description: raw data file (ptokeemft.xyz)

Distribution_Liability: The data have no explicit or implied guarantees.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ASCII text

Transfer_Size: 60

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://sofia.usgs.gov/exchanget/hansen_lakeokee/ptokeemft.xyz>

Access_Instructions: Data may be downloaded from the SOFIA website

Fees: none

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Heather S. Henkel

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing address

Address: 600 Fourth St. South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: 727 803-8747 ext 3028

Contact_Facsimile_Telephone: 727 803-2030

Contact_Electronic_Mail_Address: hhenkel@usgs.gov

Resource_Description: Elevation Contours of Lake Okeechobee 2001

Distribution_Liability: The data have no explicit or implied guarantees.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Adobe Illustrator

Format_Version_Number: unknown

Format_Information_Content:

AI-ft.zip is the feet version of the contour map and AI-m.zip is the meter version of the map.

File_Decompression_Technique: The files are "zipped" and must be "unzipped" before use.

Transfer_Size: 96

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<http://sofia.usgs.gov/publications/maps/lakeokeebathy/index.html#data>

Access_Instructions: The contour maps may be downloaded from the SOFIA website.

Digital_Form:

Digital_Transfer_Information:

Format_Name: JPEG

Format_Version_Number: unknown

Format_Information_Content:

The maps are available in two versions - contours in feet and contours in meters

Transfer_Size: 0.6

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<http://sofia.usgs.gov/publications/maps/lakeokeebathy/index.html#data>

Access_Instructions: The maps may be downloaded from the SOFIA website

Digital_Form:

Digital_Transfer_Information:

Format_Name: Adobe PDF

Format_Version_Number: unknown

Format_Information_Content:

The maps are available in two sizes - 8.18 x 9.92 in and 27.24 x. 33.03 in with the contours in feet and meters

Transfer_Size: 3.9

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<http://sofia.usgs.gov/publications/maps/lakeokeebathy/index.html#data>

Access_Instructions: The maps may be downloaded from the SOFIA website

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20110518

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Heather Henkel

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address

Address: 600 Fourth Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: 727 803-8747 ext 3028

Contact_Facsimile_Telephone: 727 803-2030

Contact_Electronic_Mail_Address: sofia-metadata@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: none

Metadata_Use_Constraints:

This metadata record may have been copied from the SOFIA website and may not be the most recent version. Please check <http://sofia.usgs.gov/metadata> to be sure you have the most recent version.

The principal investigator for this project has declined to provide a review of the information in the metadata record. Any questions about the information should be directed to the Point of Contact under Citation Information or the Process Contact(s).

U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather Henkel - Webmaster
Generated by mp version 2.8.18 on Wed May 18 09:51:43 2011