2018 ILHMP Lidar: Boone and Winnebago Counties, IL

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Overview

LIDAR-derived binary (.las) files ASPRS ver 1.4 format containing classified points of all returns. We have 11 classifications: Unclassified, Ground, Low Veg (0.5 - 5 ft), Medium Veg (5 - 20 ft), High Veg (> 20 ft), Buildings, Low Noise, Water, Ignore Ground, Bridge Decks and High Noise. Model key points are bit-flagged and created from ground (class = 2) points using a two foot horizontal and a 0.2 foot vertical variance. The files are delivered in section formatted tiles. These files adhere to the National Enhanced Elevation Assessment (NEEA) Quality Level 2 (QL2) standards. The contractual aggregate nominal pulse spacing (ANPS) is less than or equal to 0.5m. The contractual aggregate nominal point density (ANPD) is 4.0 points or greater per square meter. Boone County is approximately 303 square miles. Winnebago County is approximately 554.5 square miles.
Total points: 16,745,812,842 pts
Survey Area: 2,185 km2
Point Density: 7.66 pts/m2
Survey Date: 04/22/2018 - 04/25/2018
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