LiDAR and Contour Data
|Welcome to the LiDAR Information Page!|
|In the year 2014, Polk County made an agreement with Ayres and Associates, Madison, to acquire aerial LiDAR (Light Detection And Ranging) data in the spring of 2015. The LiDAR data has been processed and classified to support a bare earth surface model and 2' topographic contours. Bare earth LiDAR surface met FEMA vertical accuracy standards (0.61 feet RMSEz using FEMA compliant/NSSDA testing procedures).|
|Obtain LiDAR data from the GIS Data Portal.|
Slope data can be used for water flow, run-off, and erosion modeling.
Flood, storm damage response and mitigation plans.
Engineering and Transportation
Elevation data can be used for preliminary site engineering and road planning.
Contour data accepted by FEMA can be used for National Flood Insurance Program mapping.
Tree canopy characterization and modeling.
Elevation data aids emergency planners in determining where contaminants would collect in a disaster situation.
Hydro-flattened breaklines will be compiled for ponded water that is 2 acres or greater and double lined streams with a minimum width of 20 feet. This data will improve the accuracy of the Polk County Zoning Shoreland District and parcel mapping.
Search and Rescue
Slope data and contours can be used to identify access points and topographic barriers for response teams.
Slope data can be used for erosion and conservation planning along lakes and rivers.
Flow direction, speed, and volume can be modeled in rural and urban settings.
Slope and vegetation data used for siting of utility poles, lines, and pipelines.
M-F, 8:30 AM to 4:30 PM
|Division of Environmental Services
Department of Land Information
Polk County Government Center
100 Polk County Plaza, Suite 130
Balsam Lake, WI 54810