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2007 Florida Division of Emergency Management (FDEM) Lidar: Herbert Hoover Dike Project Area (Southeastern Florida, Lake Okeechobee Surrounding Area)

browse graphicThis kmz file shows the extent of coverage for the 2007 FDEM Herbert Hoover Dike (Lake Okeechobee), FL lidar data set.
LiDAR data was collected by Merrick & Company from September through December of 2007 for the Florida Division of Emergency Management (FDEM). The project area is located in the southeastern part of Florida, in parts of the counties surrounding Lake Okeechobee. LiDAR was collected over approximately 2289 square miles in parts of the following counties: Broward, Glades, Hendry, Highlands, Martin, Okeechobee, and Palm Beach. The maximum point spacing is 4 ft in unobscured areas. This data set is a classified data set and has a classification for sugar cane.

Cite this dataset when used as a source.

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    Distribution Formats
    • LAZ
    Distributor DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
    Point of Contact Florida Division of Emergency Management (FDEM)
    850-413-9969
    Associated Resources
    • Lidar Dataset Supplemental Information
    Originator
    • DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
    Originator
    • Florida Division of Emergency Management (FDEM)
    Publisher
    • DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
    Date(s)
    • publication: 2009-01-01
    Data Presentation Form: Digital image
    Dataset Progress Status Complete
    Data Update Frequency: As needed
    Supplemental Information: Class 1 = Unclassified, includes vegetation, buildings, etc.; Class 2 = Ground; Class 3 = Sugar Cane; Class 7 = Noise; Class 9 = Water; Class 12 = Overlap
    Purpose: To produce accurate, high-resolution data for planning and analysis to support the Florida Division of Emergency Management (FDEM) development and maintenance of regional evacuation studies, which include vulnerability assessments and to assist disaster response personnel in understanding threats to Florida's citizens and visitors.
    Use Limitations
    • These data depict the elevations at the time of the survey and are only accurate for that time. Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Any conclusions drawn from analysis of this information are not the responsibility of NOAA or any of its partners. These data are NOT to be used for navigational purposes.
    Time Period: 2007-09-08  to  2007-12-19
    Spatial Reference System: urn:ogc:def:crs:EPSG::4269 Ellipsoid in Meters
    Spatial Bounding Box Coordinates:
    N: 27.263520
    S: 26.313731
    E: -80.130248
    W: -81.325891
    Spatial Coverage Map:
    Themes
    • Bathymetry/Topography
    • DTM
    • DSM
    • LiDARgrammetry
    • LiDAR
    • LAS
    Places
    • US
    • Florida
    • Herbert Hoover Dike
    • Lake Okeechobee
    • Broward County
    • Glades County
    • Hendry County
    • Highlands County
    • Martin County
    • Okeechobee County
    • Palm Beach County
    Use Constraints No constraint information available
    Fees Fee information not available.
    Lineage Statement Lineage statement not available.
    Processor
    • Merrick & Co
    • DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    Processing Steps
    • The ABGPS, IMU, and raw Leica ALS50 Phase 2 Plus LiDAR data are integrated with Leica Incorporated's ALS Post Processor software. The resultant file is in a LAS binary file format. The LAS file version 1.1 format can be easily transferred from one file format to another. It is a binary file format that maintains information specific to the LiDAR data (return#, intensity value, xyz, etc.). The resultant points are produced in the geodetic coordinates referenced to the NAD83 HARN horizontal datum and NAVD88 vertical datum. The date and time for each flight line can be determined using the Julian date and time. The Julian date is a continuous count of days and fractions since noon Universal Time on January 1, 4713 BCE on the Julian calendar.
    • The unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary filters are applied as appropriate for the production of bare earth digital terrain models (dtms). Interactive editing methods are applied to those areas where it is inappropriate or impossible to use the feature extraction filters, based upon the design criteria and/or limitations of the relevant filters. These same feature extraction filters are used to produce elevation height surfaces. The LiDAR mass points were delivered in American Society for Photogrammetry and Remote Sensing LAS 1.1 format. The header file for each dataset is complete as defined by the LAS 1.1 specification. In addition the following fields are included: Flight Date Julian, Year, and Class. The LAS files do not contain overlap (class 12). The data was classified as follows: Class 1 = Unclassified. This class includes vegetation, buildings, etc. Class 2 = Ground Class 3 = Sugarcane (Job specific classification, not used in contour generation) Class 7 = Noise Class 9 = Water Class 12 = Overlap Sugarcane points (class 3) were added to this project at the request of the US Army Corps of Engineers. The lidar sensor could not adequately penetrate sugarcane fields. A method was developed to define the location of sugarcane. Points inside of the sugar_cane feature class in the HHD geodatabase were either classified as unclassified (class = 1) or sugarcane (class = 3). There are no ground (class = 2) points inside of the sugar_cane feature class.
    • The NOAA Coastal Services Center (CSC) received files in LAS format. The files contained LiDAR intensity and elevation measurements. CSC performed the following processing on the data to make it available within Digital Coast: 1. The data were converted from State Plane Florida East coordinates to geographic coordinates. 2. The data were converted from NAVD88 heights to ellipsoid heights using Geoid03. 3. The LAS header fields were sorted by latitude and updated.
    • The NOAA National Geophysical Data Center (NGDC) received lidar data files via ftp transfer from the NOAA Coastal Services Center. The data are currently being served via NOAA CSC Digital Coast at http://www.csc.noaa.gov/digitalcoast/. The data can be used to re-populate the system. The data are archived in LAS or LAZ format. The LAS format is an industry standard for LiDAR data developed by the American Society of Photogrammetry and Remote Sensing (ASPRS); LAZ is a loseless compressed version of LAS developed by Martin Isenburg (http://www.laszip.org/). The data are exclusively in geographic coordinates (either NAD83 or ITRF94). The data are referenced vertically to the ellipsoid (either GRS80 or ITRF94), allowing for the ability to apply the most up to date geoid model when transforming to orthometric heights.

    Metadata Last Modified: 2013-06-07

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