| 2004 St. Johns County, Florida Lidar |
| This dataset is the bare earth lidar data for St. Johns County, Florida, acquired
in early January and February of 2004. This data was collected to develop comprehensive
countywide base mapping and perform other GIS enhancements to support master drainage
planning, transportation planning, preliminary engineering and wetland preservation
studies. The surveyed area included all of St. Johns County, approximately 610 square
miles. Eighty-seven (87) flight lines of high density lidar data (average GSD is 3.3
feet) were obtained at an altitude of 3000 feet AGL. This data set contains only model
keypoints (points that are a thinned data set that is intended to remove extraneous
data such as trees and points that are deemed redundant to the final bare earth product)
that are classified as ground points. As a result, there are a lower number of points
than in a full mass point lidar data set; and it is recommended that the data be downloaded
as points and used with a TIN (Triangulated Irregular Network) or similar algorithm
to produce a bare earth surface.
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