GIS: A Tutorial for Viewshed Delineation Using SAGA and LIDAR Data

A step-by-step description of how to use the SAGA GIS program to delineate viewsheds as part of the process to evaluate visual impacts. Three scenarios are explored. One is related to visual impacts to a popular recreation hiking trail from a major highway. A second scenario is specific to visual impacts from a hypothetical clearcut timber harvest. And a third one relates to a multi-interest committee looking at options for open space and timberland land use. LIDAR data, particularly vegetation height, provides elevation data for viewshed delineation. Data files are available to download.