Viewshed-class          An S4 class to represent the viewshed
calculate_diversity     calculate_diversity
calculate_feature       calculate_feature
calculate_viewmetrics   calculate_viewmetrics
compute_viewshed        compute_viewshed
fov_mask                fov_mask
intervis_network        intervis_network
pano_view               pano_view
visual_magnitude        visual_magnitude
visualize_viewshed      visualize_viewshed
