Web services > LiDAR > Wisconsin--Wood County > 2015-2019

LiDAR Breaklines [Wisconsin--Wood County]

Wood County Open Data Portal · 2017 Full Details

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Full Details

Title
LiDAR Breaklines [Wisconsin--Wood County]
Description
Ayres Associates provided Wood County, Wisconsin, with lidar based topographic mapping services in the spring of 2015 as part of WROC. The LiDAR data was collected from 3/21/2015 to 3/31/2015 using an Optech Orion H300 sensor mounted in a fixed-wing aircraft. LiDAR data was collected to support the generation of 2-foot contours to meet FEMA vertical accuracy standards. The LiDAR data was delivered according to a 5,000 foot x 5,000 foot tile schematic. The LiDAR data was calibrated using information collected at the time of flight from GPS base stations on the ground and airborne GPS/IMU in the aircraft. The calibrated LiDAR data was processed to produce a classified point cloud, bare earth DTM, DEM, DSM, contours, breaklines, and intensity images. Hydrographic breaklines are collected using LiDARgrammetry to ensure hydroflattened water surfaces. This process involves manipulating the LiDAR data's intensity information to create a metrically sound stereo environment. From this generated "imagery", breaklines are photogrammetrically compiled. Breakline polygons are created to represent open water bodies. The LiDAR points that fall within these areas are classified as "water." Breaklines representing streams and rivers shall be smooth, continuous, and monotonic, and represent the water surface without any stair steps except for dams and rapids. All hydrographic breaklines include a 1 foot buffer, with the points being re-classified as Class 10 (ignored ground). TerraSolid is further used for the subsequent manual classification of the LiDAR points allowing technicians to view the point cloud in a number of ways to ensure accuracy and consistency of points and uniformity of point coverage. The 2014 breaklines dataset contains the hydrographic breaklines necessary for terrain surface development.
Creator
Wood County Land Information Office
Publisher
Wood County Open Data Portal
Temporal Coverage
Last Modified: 2017-02-01
Date Issued
2017-01-31
Rights
https://creativecommons.org/licenses/by/3.0
Access Rights
Public
Format
ArcGIS FeatureLayer
Language
English
Date Added
August 10, 2025
Provenance Statement
The metadata for this resource was last retrieved from Wood County Open Data Portal on 2026-01-08.

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Cite and Reference

  • Citation
    Wood County Land Information Office (2017). LiDAR Breaklines [Wisconsin--Wood County]. Wood County Open Data Portal. https://opendata.woodcogis.com/datasets/WoodWI::lidar-breaklines (web service)
  • BTAA Geoportal Link

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