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2007 Florida Division of Emergency Management (FDEM) Lidar Project: Eastern Indian River County

browse graphicThis kmz file shows the extent of coverage for the 2007 Indian River County, FL lidar data set.
This Light Detection and Ranging (LiDAR) LAS dataset is a topographic survey conducted for a coalition of GIS practitioners, including the Florida Division of Emergency Management (FDEM), Florida Water Management Districts, Florida Fish and Wildlife Conservation Commission, Florida Department of Environmental Protection, Army Corps of Engineers Jacksonville District, and other state and federal agencies. The goal for this project is to use the LiDAR data as new elevation inputs for updated SLOSH data grids. The ultimate result is the update of the Regional Hurricane Evacuation Studies (RHES) for the state. The State of Florida Division of Emergency Management LiDAR Survey was collected under the guidance of a Professional Mapper/Surveyor. Data were collected for 255 square miles in the eastern portion of Indian River County, Florida from August 24 - 28, 2007. This is a classified lidar data set. The data are classified: 1 = Unclassified, 2 = Ground (Bare Earth), 7 = Noise, 9 = Water and 12 = Overlap. The data was collected at a maximum post spacing of 4 feet in unobscured areas for random point data.

Cite this dataset when used as a source.

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    Distribution Formats
    • LAZ
    Distributor Distributor information not available
    Point of Contact Florida Division of Emergency Management (FDEM)
    Associated Resources
    • Lidar Dataset Supplemental Information
    • Florida Division of Emergency Management (FDEM)
      • publication: 2008-01-01
      Data Presentation Form: Digital image
      Dataset Progress Status Complete
      Data Update Frequency: As needed
      Purpose: The LiDAR topographic mapping survey is to support the Florida Division of Emergency Management (FDEM) development and maintenance of Regional Hurricane Evacuations Studies (RHES), which include vulnerability assessments, and to assist disaster response personnel in understanding the threats to Florida's citizens and visitors. Additional intended uses for this survey are growth management, map modernization/floodplain mapping, natural lands stewardship, and homeland security planning.
      Time Period: 2007-08-24  to  2007-08-28
      Spatial Reference System:
      Spatial Bounding Box Coordinates:
      N: 27.867889
      S: 27.550789
      E: -80.309070
      W: -80.617170
      Spatial Coverage Map:
      • Bathymetry/Topography
      • Photogrammetry
      • Terrain
      • Stereo Model
      • Contours
      • LiDAR
      • Hydrology
      • DEM
      • United States
      • Florida
      • Indian River County
      Use Constraints No constraint information available
      Fees Fee information not available.
      Source Datasets
      • State of Florida Division of Emergency Management LiDAR Project Survey
        • Description of Source: Source Contribution: The LiDAR Project Survey was acquired for the Florida Division of Emergency Management and processed by Woolpert Inc. To collect the breaklines the LiDAR data was used as the main source data set in addition to orthophotography. Orthophoto imagery was from new imagery collected and developed by the Woolpert Team. All imagery for Indian River County is dated 2007 with a 0.5 foot pixel resolution. Source Type: disc
        • Temporal extent used:  unknown  to 
      Lineage Statement Lineage statement not available.
      • Woolpert, Inc.
      • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
      Processing Steps
      • LiDAR was collected within portions of Indian River County. System Parameters/Flight Plan: The LiDAR system acquisition parameters were developed based on a maximum average ground sample distance of 4 feet. Two Leica ALS50 sensors were used for acquisition. Acquisition specifications for the two sensors were as follows: Sensor 19 Field of View (full angle) - 29 degrees Nominal flight altitude (AMSL) - 3999.30 feet Airspeed - 54.02 meters/sec Laser pulse rate - 75,000 Hz Nominal swath width (on ground) - 2068.58 feet Maximum cross track point spacing - 3.91 feet Maximum along track point spacing - 3.94 feet Average point spacing - 2.21 feet Flight line spacing - 1544.95 feet Side overlap - 25.31%. Sensor 59 Field of View (full angle) - 29 degrees Nominal flight altitude (AMSL) - 3999.30 feet Airspeed - 60.70 meters/sec Laser pulse rate - 84,400 Hz Nominal swath width (on ground) - 2068.58 feet Maximum cross track point spacing - 3.94 feet Maximum along track point spacing - 3.91 feet Average point spacing - 2.21 feet Flight line spacing - 1413.72 feet Side overlap - 31.66%. LiDAR System Calibration: Prior to the LiDAR acquisition, the system underwent a calibration to verify the operational accuracy and misalignment angles. Boresight calibrations were performed for each LiDAR system at the beginning and end of each flight mission. LiDAR Data Acquisition: LiDAR data acquisition only occurred when the sky was sufficiently clear of clouds, smoke, and atmospheric haze. The LiDAR data was processed immediately after the acquisition to verify the coverage had no voids. GPS/Inertial Measurement Unit (IMU) Post Processing: The GPS and IMU data was post processed using differential and Kalman filter algorithms to derive a best estimate of trajectory. The quality of the solution was verified to be consistent with the accuracy requirements of the project. LiDAR Processing and Classification: The LiDAR data was post processed and verified to be consistent with the project requirements in terms of post spacing and absence of artifacts. The point cloud underwent classification to determine bare-earth points (class 2), noise points (class 7), water returns (class 9), and unclassified data (class 1). Class 12 contains LiDAR points removed from the overlap region between adjacent flight lines.
      • 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 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 ( 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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