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2009 Northwest Florida Water Management District (NWFWMD)Lidar: Leon County

browse graphicThis kmz file shows the extent of coverage for the March 2009 NWFWMD Leon County, FL lidar data set.
This dataset is part of a regularly scheduled update of planimetric, hydrographic, and topographic features. The dataset was created from source imagery acquired by a Leica ADS40 multispectral scanner and LAS data acquired by a Leica ALS50 Phase I Lidar sensor from January 31, 2009 through February 6, 2009.

Cite this dataset when used as a source.

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    Distribution Formats
    • LAZ
    Distributor Distributor information not available
    Point of Contact Mr. Greg Mauldin
    (850) 606-5587
    Documentation links not available.
    • Northwest Florida Water Management District (NWFWMD)
      • publication: 2011-04-01
      Data Presentation Form: Digital image
      Dataset Progress Status Complete
      Data Update Frequency: As needed
      Supplemental Information: LAS classifications: 1 = Unclassified 2 = Ground 7 = Noise 9 = Water 10 = Swamp
      Purpose: TLCGIS regularly uses digital orthophotos and planimetric/hydrographic/topographic data to support regulatory functions, land management and acquisition, planning, engineering and habitat restoration projects.
      Time Period: Unknown  to  Unknown
      Spatial Reference System:
      Spatial Bounding Box Coordinates:
      N: 30.690
      S: 30.270
      E: -83.974
      W: -84.717
      Spatial Coverage Map:
      • Bathymetry/Topography
      • LAS
      • Lidar
      • Northwest Florida Water Management District
      • NWFWMD
      • Tallahassee
      • Leon County
      • Florida
      • USA
      Use Constraints No constraint information available
      Fees Fee information not available.
      Source Datasets
      • Ground Control
        • Description of Source: Source Contribution: Ground control data. Horizontal and vertical control was used to establish positions and elevations for reference and correlation purposes and as input to the aerotriangulation process. Control consists of Airborne GPS/IMU and ground control points for ground reference. Source Type: digital files
        • Temporal extent used:  unknown  to 
      Lineage Statement Lineage statement not available.
      • Merrick and Company
      • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
      Processing Steps
      • Lidar data was collected using Leica's ALS50 Phase I sensor. The raw data was verified in MARS software for complete coverage of the project area, and bore sighted to align the flight lines. Raw data files were parsed into manageable client-specific tiles. These tiles were then processed through automated filtering that separates the data into different classification groups: unclassified points, ground points, "noise" points and water. The data was next taken into MARS to reclassify the erroneous points that may remain in the Lidar point cloud after auto-filter.
      • The NOAA Coastal Services Center (CSC) received the lidar files 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. Data converted from State Plane coordinates to geographic coordinates. 2. Data converted from NAVD88 heights to ellipsoid heights using GEOID03. 3. The LAS data were sorted by latitude and the headers were 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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