Click here or the image above to download LiDAR Data
Available LiDAR Products:
Classified Point Cloud, LAS 1.4 format
The calibrated LiDAR point cloud is classified to the following base classification scheme:
Digital Elevation Model (DEM)
Generated from classified bare earth points (Class 2) and breaklines.
Topographic improved 2-foot contours
Generated at 2-foot contour intervals from the bare earth surface and breaklines. Formatted in ESRI shapefile tiles.
About Buffalo County 2017 LiDAR
In the spring of 2016 Survey Crews with Ayres Associates were in Buffalo County collecting ground truth control points in preparation for aerial LiDAR collection. The control points are used by the aerial mapping group at Ayres Associates to post process the data and to verify the vertical accuracy of the various types of ground cover that Buffalo County has.
The county was divided into 22 different areas for this survey to ensure that the data collected was spread evenly throughout the county. Each area has roughly 4-5 ground types and one horizontal. Horizontal accuracy points are also established in order to ensure that the data is horizontally accurate.
Using GPS and total station instruments the survey crews captured roughly 3-5 sites per day, depending on different variables (cell phone coverage, GPS monuments, weather, etc.). Once completed with the field portion of the ground truthing survey, the aerial mapping group with Ayres Associates flew the LiDAR capture mission over Buffalo County on March 22nd 2016.
Inside the aircraft
Determine Area of Interest and create flight boundary
Design flight plan based on required point density and predominant terrain within AOI
Design base station layout (WISCORS) to determine which stations will control flight
Collect calibration ground control points
Collect independent QC ground control points under different land cover types
Execute flight during snow free and leaf off ground conditions
Calibrate raw point cloud using calibration control
Collect hydro breaklines for lakes and rivers
Manual edit of bare earth points
Process bare earth DEM
Generate 2-ft contours
QC point cloud against independent control and verify accuracy specs