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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 416 square miles in the eastern portions of Clay and Putnam Counties, Florida
from August 18 - September 4, 2007. This is a classified lidar data set. The data
are classified: 1 = Unclassified, 2 = Ground (Bare Earth), 7 = Noise and 9 = Water.
The FDEM Baseline Specifications required a maximum post spacing of 4 feet, however,
the PDS (Program and Data Solutions) team required a much higher point density of
its subcontractors in order to increase the probability of penetrating dense foliage
during the mandated summer acquisition; with nominal post spacing of 0.7 meters per
flight line and 50% sidelap between flight lines, the average point density is 4 points
per square meter.
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