2008 Northwest Florida Water Management District (NWFWMD) Lidar: Eglin Air Force Base, Walton County, FL

In the summer of 2008, the Northwest Florida Water Management District collected lidar data over a portion of Walton County, FL (Eglin Air force Base)

to support various projects such as floodplain and hazards mapping, wetlands mitigation and stormwater management. The data collection occured in a

portion of the county for which there is no prior collected lidar data. Used in conjunction with previously collected data in Walton County

(FDEM Lidar collected in 2006), these data support the creation of a county-wide, high resolution, lidar derived digital elevation model(DEM).

Original contact information:

Contact Name: John B. Crowe

Contact Org: Northwest Florida Water Management District

Title: Associate Hydrologist

Phone: (850) 539-5999

Email: John.Crowe@nwfwmd.state.fl.us

To supplement previously collected lidar data in the creation of county-wide, high resolution, lidar derived digital elevation models (DEM).

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Reflective surface data represents the DEM created by laser energy reflected from the first surface encountered by the laser pulse. Some energy

may continue beyond this initial surface to be reflected by a subsequent surface as represented by the Last Return data. Intensity information is

captured from the Reflective Surface pulse and indicates the relative energy returned to the sensor as compared to the energy transmitted. The

Intensity image is not calibrated or normalized but indicates differences in energy absorption due to the interaction of the surface materials

with laser energy at the wavelength transmitted by the sensor. Points are classified as water, bare ground or not bare ground to support

creation of a bare earth model from the data.

A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/574/supplemental/2008_NWFWMD_Lidar_WaltonCounty_EglinAFB.kmz

Any conclusions drawn from the analysis of this information are not the responsibility of NOAA,the Office for Coastal Management

or its partners.

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer

The data set is dynamically generated based on user-specified parameters.

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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.

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.4.1420

Contracted to meet 1 meter (RMSE) horzontal accuracy

LiDAR data accuracy determination shall employ the National Standard for Spatial Data Accuracy (NSSDA).

Contracted to meet 15cm (RMSE) on open bare terrain if errors are normally distributed.

A visual qualitative assessment was performed in the source lidar dataset.

Data covers the tile scheme provided for the Eglin Airforce Base and partially covers the tiling scheme provided for the county.