An Analysis of Solar Insolation Models Derived from Different Terrain Surfaces

Authors: Hudson Chase*, Radford University, Andrew Foy, Radford University
Topics: Spatial Analysis & Modeling
Keywords: GIS, Solar Radiation, Applications
Session Type: Poster
Day: 4/13/2018
Start / End Time: 1:20 PM / 3:00 PM
Room: Napoleon Foyer/Common St. Corridor, Sheraton, 3rd Floor
Presentation File: No File Uploaded


The increasing use of airborne LiDAR for a myriad of applications and analyses provides precise and useful information regarding landscape and building forms. However, the financial cost of acquiring the data and limited availability makes Digital Elevation Models (DEM) a more commonly used terrain surface in GIS applications. Modeling solar insolation is an example of a common GIS application using terrain surfaces. The objective of this research is to compare solar insolation models that are derived from different terrain surfaces to determine if the models are significantly different from each other. The study area is downtown Alpharetta, Georgia. This study is important because if solar insolation estimates are statistically different between the 1-Arc second, 1/3-Arc second, and LiDAR models then there are implications to the implementation of GIS applications when utilizing various resolution DEMs and LiDAR datasets. Derived sample data needed for an ANOVA test was aggregated by building footprints in the study area. The results of this research show the differentiation of these models and how they are then leveraged in practical GIS applications. This research seeks to determine whether using LiDAR for renewable energy applications is advantageous over DEMs.

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