Lidar accuracy assessment by intensity images and ground control points

Wei Chen Hsu*, Tian-Yuan Shih, Jin King Liu, Ta Ko Chen, Hsin Yu Ho

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

With high repetition rate of laser measurements, the airborne lidar system is capable to provide massive number of points with three dimensional coordinates. These measurements can be used for DEM production. The height accuracy of airborne lidar measurements reaches decimeter level. But the horizontal accuracy of the lidar points is difficult to evaluate due to the uncertainty of the scattered points. This study measured the horizontal coordinates of signalized points in the lidar intensity image. These signalized points were formerly established for the geo-referencing of satellite images. It is found that the horizontal accuracy of lidar points are in the range of -0.483∼+0.785 meters, roughly 1/2000 of the flying height of the mission. The number of laser points on the target of signalized point is found not related to the horizontal accuracy.

Original languageEnglish
Title of host publication28th Asian Conference on Remote Sensing 2007, ACRS 2007
Pages1956-1961
Number of pages6
StatePublished - 1 Dec 2007
Event28th Asian Conference on Remote Sensing 2007, ACRS 2007 - Kuala Lumpur, Malaysia
Duration: 12 Nov 200716 Nov 2007

Publication series

Name28th Asian Conference on Remote Sensing 2007, ACRS 2007
Volume3

Conference

Conference28th Asian Conference on Remote Sensing 2007, ACRS 2007
CountryMalaysia
CityKuala Lumpur
Period12/11/0716/11/07

Keywords

  • Feature identification
  • LIDAR
  • Point cloud

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