Derivation of sky-view factors from lidar data

Chris Kidd, Lee Chapman
2012 International Journal of Remote Sensing  
The use of Lidar (Light Detection and Ranging), an active light-emitting instrument, is becoming increasingly common for a range of potential applications. Its ability to provide fine resolution spatial and vertical resolution elevation data makes it ideal for a wide range of studies. This paper demonstrates the capability of Lidar data to measure sky view factors (SVF). The Lidar data is used to generate a spatial map of SVFs which are then compared against photographically-derived SVF at
more » ... derived SVF at selected point locations. At each location three near-surface elevations measurements were taken and compared with collocated Lidar-derived estimated. It was found that there was generally good agreement between the two methodologies, although with decreasing SVF the Lidar-derived technique tended to overestimate the SVF: this can be attributed in part to the spatial resolution of the Lidar sampling. Nevertheless, airborne Lidar systems can map sky view factors over a large area easily, improving the utility of such data in atmospheric and meteorological models. https://ntrs.nasa.gov/search.jsp?R=20140006588 2020-07-10T02:05:44+00:00Z
doi:10.1080/01431161.2011.635163 fatcat:vftsblbd7zd7lbm3cwlhzf65xa