Metadata: Identification_Information: Citation: Citation_Information: Originator: Mark Hansen Publication_Date: 2015 Title: Single-Beam derived bathymetric contours of Lake Okeechobee, Florida (2001) in Esri shapefile format Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Archive of Bathymetry Data Collected in South Florida from 1995 to 2015 Issue_Identification: U.S. Geological Survey Data Series-1031 Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/ds/1031/download/LOkee/contours/DS1031-LOkee_UTM17_NAVD88-G99_shp.contours.zip Description: Abstract: Lake Okeechobee is located in south Florida and is bounded by the Kissimmee River Basin to the north and Everglades National Park to the south. Lake Okeechobee is the largest lake (1,890 square kilometers [km2]) in Florida and encompasses a drainage area of over 14,200 km2. The lake provides agricultural water supply, back-up water supply for urban areas, flood protection to adjacent communities, critical bird and fisheries habitats, is part of the Okeechobee Waterway navigation canal, and offers boating-related recreation. Over the past 100 years, land use change and population increases have adversely impacted the health of the lake, mostly by extreme water level fluctuations and excessive nutrient loading mainly from agricultural activities. High-resolution bathymetric mapping was conducted in 2001 in Lake Okeechobee by the USGS, in cooperation with the South Florida Water Management District (SFWMD). High-resolution, acoustic bathymetric surveying is a proven method to map sea and lake floor elevations. Survey tracklines were spaced 1000 meters apart and orientated in a north-south direction. Tracklines collected in an east-west orientation (intersecting tracklines) functioned to serve as a cross-check and to assess the relative vertical accuracy of the survey. Ideally, vertical data values at the crossing should be exactly the same. In reality, this is not always the case due to random errors associated with the survey system. Several perimeter survey lines were also collected. Soundings were collected along each trackline at 3-meter spacing. Approximately 1,550 kilometers of survey lines were collected. In shallow areas, data were collected in a minimum of 0.6 meters water depth, unless potential damage to the bottom environment or the boat/motors was a significant possibility. This report serves as an archive of processed single-beam bathymetry data that were collected in Lake Okeechobee, Florida, in 2001. Geographic information System (GIS) data products include XYZ data, bathymetric contours, and USGS quadrangle maps and associated formal Federal Geographic Data Committee (FGDC) metadata. Purpose: Of primary interest to the USGS and 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: 2001 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -81.018336 East_Bounding_Coordinate: -80.611538 North_Bounding_Coordinate: 27.209675 South_Bounding_Coordinate: 26.717325 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:6349a04b-9905-4fe3-b9a8-a54cee0e5cf1 Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: bathymetry Theme_Keyword: circulation model Theme_Keyword: hydrology Theme_Keyword: mapping Theme_Keyword: SANDS Theme_Keyword: sediment dynamics Theme_Keyword: System for Accurate Nearshore Depth Surveying Theme_Keyword: single beam Theme_Keyword: echosounder Theme_Keyword: erosion Theme_Keyword: hydrography Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: St. Petersburg Coastal and Marine Science Center Theme_Keyword: SPCMSC Theme_Keyword: soundings Theme_Keyword: elevation Theme_Keyword: seafloor Theme_Keyword: orthometric Theme_Keyword: water depth Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: environment Theme_Keyword: inlandWaters Theme_Keyword: elevation Theme_Keyword: geoscientificInformation Theme_Keyword: imageryBaseMapsEarthCover Theme_Keyword: oceans Place: Place_Keyword_Thesaurus: Department of Commerce, 2001, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions, Federal Information Processing Standard (FIPS) 10-4, Washington, D.C., 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, D. C., 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: Lake Okeechobee Place_Keyword: Gulf of Mexico Place_Keyword: Atlantic Ocean Place_Keyword: Everglades National Park Place_Keyword: Everglades 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 should not be used for navigational purposes. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Mark Hansen Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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) 502-8000 Contact_Electronic_Mail_Address: mhansen@usgs.gov Data_Set_Credit: South Florida Water Management District provided funding for the study. Mark Hansen was the USGS principal investigator. Nancy T. DeWitt performed a significant portion of bathymetric survey data collection and processing. BJ Reynolds and Phil Thompson provided data collection support. Native_Data_Set_Environment: Microsoft Windows 7 Enterprise, Service Pack 1; Esri ArcGIS 10.2.1 Build 3497 Cross_Reference: Citation_Information: Originator: Hansen, Mark DeWitt, Nancy T. Publication_Date: 2002 Title: High Resolution Bathymetric Mapping Geospatial_Data_Presentation_Form: report Series_Information: Series_Name: USGS South Florida Information Access (SOFIA) Issue_Identification: Web report Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: http://sofia.usgs.gov/projects/index.php?project_url=hires_bathy_lakeo Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The accuracy of the data is determined during data collection. This dataset is derived from a single research cruise using identical equipment, set-ups, and staff; therefore, it is internally consistent. Methods are employed to maintain data collection consistency aboard the platform. During mobilization, each piece of equipment is isolated to obtain internal and external offset measurements with respect to the survey platform. All the critical measurements are recorded manually and digitally entered into their respective programs. Offsets between the single-beam transducers and the Ashtech antenna reference point (ARP) were measured and accounted for in post-processing. Bar checks were performed as calibration efforts and accounted for any drift in the Marimatech Echosounder. Differential Geographic Positioning System (DGPS) coordinates were obtained using post-processing software packages developed by the National Oceanic and Atmospheric Administration (NOAA)/National Geodetic Survey (NGS) Online Positioning User Service (OPUS), National Aeronautics and Space Administration (NASA)/Jet Propulsion Laboratory (JPL) GNSS-Inferred Positioning System (GIPSY), and Scripps Orbit and Permanent Array Center (SOPAC) Online Positioning User Service. Boat trajectories were computed with PNAV v2.0 software, created by Ashtech, Inc. These bathymetric data have not been independently verified for accuracy. Logical_Consistency_Report: This dataset was acquired on a single research cruise in 2001, which was equipped with identical hardware and software systems. Completeness_Report: These are complete post-processed x,y,z bathymetric data points collected in 2001 from Lake Okeechobee, Florida, using an acoustic single-beam system. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The GPS antenna and receiver acquisition configuration used at the reference station was duplicated on the survey vessel (rover). The base receiver and the rover receiver record their positions concurrently at 1 Hz recording intervals throughout the survey. All processed measurements are referenced to the base station coordinates. GPS base or differential reference stations were operated within approximately 15 to 20 km of the survey area. Ten new, temporary ground-control points or benchmarks (surveyed to within 1- to 2-cm accuracy) were established throughout the study area for use as reference receiver sites using standard benchmark procedures. The new benchmarks were surveyed using Ashtech Z-12, 12 channel dual-frequency GPS receivers. Full-phase carrier data were recorded on each occupied benchmark in Ashtech proprietary BIN format with daily occupations ranging from 6 to 12 hours. BIN files were then converted to RINEX-2 format for position processing. All static base station GPS sessions were submitted for processing to the online OPUS, GIPSY, and SCOUT systems. The computed base location results were entered into a spreadsheet to compute one final positional coordinate and error analysis for that base location. The final positional coordinate (latitude, longitude, and ellipsoid height) is the weighted average of all GPS sessions. For each GPS session, the weighted average was calculated from the total session time in seconds; therefore, longer GPS occupation times held more value than shorter occupation times. Results were computed relative to the ITRF00 coordinate system. The established geodetic reference frame for the project was WGS84. Therefore, final reference coordinates used to process the rover data were transformed from ITRF00 to WGS84 using NOAA/NGS HTDP software v2.1. OPUS, GIPSY, and SCOUT results provide an error measurement for each daily solution. Applying these error measurements, the horizontal accuracy of the base station is estimated to be 0.04 (m) root mean squared (RMS). The kinematic (rover) trajectories were processed using PNAV v2.0, by Ashtech, Inc. A horizontal error measurement, RMS, is computed for each epoch. The horizontal trajectory errors varied between 0 and 0.08(m). The combined horizontal error from base station coordinate solutions and rover trajectories range from 0 and 0.12 (m), with the average being approximately 0.06 (m). Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 0.04 Horizontal_Positional_Accuracy_Explanation: Static GPS data were processed using OPUS, GIPSY, and SCOUT software and kinematic GPS data were processed with PNAV v2.0 software by Ashtech, Inc. and SANDS v1.2. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The GPS antenna and receiver acquisition configuration used at the reference station was duplicated on the survey vessel (rover). The base receiver and the rover receiver record their positions concurrently at 1 Hz recording intervals throughout the survey. All processed measurements are referenced to the base station coordinates. GPS base or differential reference stations were operated within approximately 15 to 20 km of the survey area. Ten new, temporary ground-control points or benchmarks (surveyed to within 1 cm to 2 cm accuracy) were established throughout the study area for use as reference receiver sites using standard benchmarks procedures. The new benchmarks were surveyed using Ashtech Z-12, 12 channel dual-frequency GPS receivers. Full-phase carrier data were recorded on each occupied benchmark in Ashtech proprietary BIN format with daily occupations ranging from 6 to 12 hours. BIN files were then converted to RINEX-2 format for position processing. All static base station GPS sessions were submitted for processing to the online OPUS, GIPSY, and SCOUT system software. The computed base location results were entered into a spreadsheet to compute one final positional coordinate and error analysis for that base location. The final positional coordinate (latitude, longitude, and ellipsoid height) is the weighted average of all GPS sessions. For each GPS session, the weighted average was calculated from the total session time in seconds; therefore, longer GPS occupation times held more value than shorter occupation times. Results were computed relative to ITRF00 coordinate system. The established geodetic reference frame for the project was WGS84. Therefore, final reference coordinates used to process the rover data were transformed from ITRF00 to WGS84 using National Oceanic and Atmospheric Administration/National Geodetic Survey(NOAA/NGS) HTDP software v2.1. OPUS, GIPSY, and SCOUT results provide an error measurement for each daily solution. Applying these error measurements, the vertical accuracy of the base station is estimated to be 0.04 (m) root mean squared (RMS). The kinematic (rover) trajectories were processed using PNAV v2.0, by Ashtech, Inc. A vertical error measurement, RMS, is computed for each epoch. The vertical trajectory errors varied between 0 and 0.08(m). The combined vertical error from base station coordinate solutions and rover trajectories range from 0 to 0.14 (m), with the average approximately 0.08 (m). Quantitative_Vertical_Positional_Accuracy_Assessment: Vertical_Positional_Accuracy_Value: 0.08 Vertical_Positional_Accuracy_Explanation: Static GPS data was processed using OPUS, GIPSY, and SCOUT software and kinematic GPS data was processed with PNAV v2.0 software by Ashtech, Inc. and SANDS v1.2. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Hansen, Mark DeWitt, Nancy T. Publication_Date: 2002 Title: High Resolution Bathymetric Mapping Type_of_Source_Media: web report Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: USGS Lake Okeechobee bathymetry Source_Contribution: Original processed bathymetric data. Process_Step: Process_Description: The final edited and reviewed processed sounding data were entered into a gridding and contouring software package, CPS-3, which was created by Radian corporation. Contours were generated using an inverse distance weighting and grid step-down operation. Contour vectors were output then entered into Adobe Illustrator (Adobe) to utilize a plug-in tool called, Map Publisher. Contours were then overlaid on USGS rectified aerial photograph Digital Orthometric Quarter Quadrangle (DOQQ). Using the Illustrator pencil tool, the contours were manually edited based upon operator local knowledge and bathymetric contouring expertise. Process_Date: 2001 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Mark Hansen Contact_Position: Oceanographer Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: mhansen@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20201013 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@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: Ring composed of arcs Point_and_Vector_Object_Count: 170 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0000001 Longitude_Resolution: 0.0000001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: D North American 1983 Ellipsoid_Name: GRS 1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: NAVD88 Depth_Resolution: 0.01 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: DS1031-LOkee_WGS84_NAVD88-G99_SB.contours.shp Entity_Type_Definition: Post-processed, bathymetric contours of Lake Okeechobee, Florida. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FID 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: Shape Attribute_Definition: Feature geometry Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Polyline Attribute: Attribute_Label: Length Attribute_Definition: Length of feature Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 555.645153 Range_Domain_Maximum: 10145.363926 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Contour Attribute_Definition: NAVD88 elevation contour Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 3.5 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 1 Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Mark E. Hansen Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer Contact_Address: Address_Type: mailing and physical address Address: 600 Fourth St. South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Contact_Voice_Telephone: (727) 502-8000 Contact_Facsimile_Telephone: (727) 502-8032 Contact_Electronic_Mail_Address: mhansen@usgs.gov Resource_Description: Single-beam bathymetry, vessel (R/V Streeterville) acquired, bathymetric data. Distribution_Liability: The data have no explicit or implied guarantees. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), 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 constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ASCII Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/ds/###https://pubs.usgs.gov/ds/1031/download/LOkee/contours/DS1031-LOkee_UTM17_NAVD88-G99_shp.contours.zip Fees: none Metadata_Reference_Information: Metadata_Date: 20201013 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Mark Hansen Contact_Position: Oceanographer Contact_Address: Address_Type: mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: mhansen@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 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