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2010 US Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) Lidar: Gulf Coast of Florida

browse graphicThis kmz file shows the extent of coverage of the 2010 USACE Florida Gulf Coast lidar data set.
These files contain topographic lidar data classified as ground (2) and unclassified (1) in accordance with the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards. These data were collected by the Compact Hydrographic Airborne Rapid Total Survey (CHARTS) system along the gulf coast of Florida from June 20 - July 22, 2010. The area of coverage includes the coastline in the following counties: Charlotte, Collier, Hillsborough, Lee, Manatee, Pasco, Pinellas, and Sarasota. CHARTS integrates topographic and bathymetric lidar sensors, a digital camera and a hyperspectral scanner on a single remote sensing platform for use in coastal mapping and charting activities. Data coverage generally extends along the coastline from the waterline inland 500 meters (topography) and offshore 1,000 meters or to laser extinction (bathymetry). The topographic lidar sensor has a pulse repetition rate of 9 kHz at 1064 nm (near-infrared wavelength). The bathymetric lidar sensor has a pulse repetition rate of 1 kHz at 532 nm (green wavelength). Native lidar data is not generally in a format accessible to most Geographic Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis. The data were provided to NOAA CSC in decimal degrees of latitude and longitude, referenced to the North American Datum of 1983 (NAD83). Vertical positions were referenced to the NAD83 ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID03 model was used to transform the vertical positions from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). The format of the file was LAS version 1.1. For data storage and Digital Coast provisioning purposes, NOAA CSC converted the orthometric heights (NAVD88) back to ellipsoidal heights using GEOID03.

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    Distribution Formats
    • LAZ
    Distributor Distributor information not available
    Point of Contact
    Documentation links not available.
      • publication: 2011-09-01
      Data Presentation Form: Digital image
      Dataset Progress Status Complete
      Data Update Frequency: As needed
      Supplemental Information: A footprint of this data set may be viewed in Google Earth at:
      Purpose: These data were collected as a part of the National Coastal Mapping Program (NCMP) to depict the elevations above the water in the Florida coastal zone.
      Time Period: 2010-06-20  to  2010-07-22
      Spatial Reference System:
      Spatial Bounding Box Coordinates:
      N: 28.234523
      S: 25.843788
      E: -81.676366
      W: -82.852428
      Spatial Coverage Map:
      • Bathymetry/Topography
      • Lidar
      • U.S. Army Corps of Engineers, Mobile District
      • JALBTCX
      • CHARTS
      • SHOALS
      • Topography
      • Classified LAS
      • Coastal Elevation
      • Terrain Elevation
      • United States
      • Florida
      • Charlotte County
      • Collier County
      • Hillsborough County
      • Lee County
      • Manatee County
      • Pasco County
      • Pinellas County
      • Sarasota County
      • Bayshore Gardens
      • Bonita Springs
      • Cape Coral
      • Dunedin
      • Englewood
      • Gulf Gate Estates
      • Gulfport
      • Holiday
      • Iona
      • Largo
      • Marco Island
      • Naples
      • Palmetto
      • San Carlos Park
      • Sarasota
      • Seminole
      • South Bradenton
      • South Venice
      • Tarpon Springs
      • Venice
      Use Constraints No constraint information available
      Fees Fee information not available.
      Lineage Statement Lineage statement not available.
      • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
      Processing Steps
      • These data were collected using the CHARTS system. It is owned by the Naval Oceanographic Office and operated through contract. The system collects topographic lidar data at 9 kHz, bathymetric lidar data at 1kHz and RGB imagery at 1Hz. A CASI-1500 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of Novatel and POS A/V 410 equipment. All raw data streams are transferred to the office for downloading and processing in SHOALS GCS software. Aircraft position data are processed using POSPac software and the results are combined with the lidar data to produce 3-D positions for each lidar shot. Upon inspection and QA/QC in the software packages Fledermaus and PFM_ABE, anomalous data are flagged as invalid. PFM_ABE's chartsLAS module then converts all valid data from ellipsoid to orthometric heights based on the NGS' GEOID03 model and exports topographic data as a series of LAS files with a single file per flightline per 5 km box.
      • The flightline LAS files are imported into the TerraScan V11 module within MicroStation V8.0. The resulting LAS files are thinned to eliminate duplicate points. A customized classification macro is used to distinguish ground points (2) and unclassified points (1). The classification results are QC'd and any misclassified points are manually edited. In areas of dense vegetation the bare ground points might be incorrectly classified due to the inability of the laser to penetrate the canopy and reach the bare ground. In these areas, JALBTCX defaults to the algorithm's "ground" surface instead of manually reclassifying those points. The points are exported to an ASCII file containing the following fields: longitude, latitude, elevation (orthometric), intensity, classification, mirror angle, time (GPS time), number of echoes, and echo number. The ASCII file is converted to LAS with the txt2las code from LAStools (
      • The NOAA Coastal Services Center (CSC) received classified data (ASPRS LAS classifications include: 1 (unclassified) and 2 (ground)) in las format. The files contained LiDAR intensity and elevation measurements. CSC performed the following processing for data storage and Digital Coast provisioning purposes: 1. The data were converted from NAVD88 heights to ellipsoid heights using Geoid03. 2. 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: 2013-05-09

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