“…One use of HRSI is the application of stereogrammetry to estimate surface elevations. Recently, work with this HRSI application has involved detailed surface elevation mapping, characterizing canopy surface elevations, and quantifying height and biomass density in a variety of forests (Baltsavias, Gruen, Eisenbeiss, Zhang, & Waser, 2008;Lagomasino, Fatoyinbo, Lee, & Simard, 2015;Montesano, Sun, Dubayah, & Ranson, 2014;Neigh et al, 2016;2014;Persson, Wallerman, & Olsson, 2013;Poon, Fraser, & Zhang, 2007;Shean et al, 2016;Vega & St-Onge, 2008). The pointing capabilities of HRSI platforms (e.g., QuickBird, IKONOS, GeoEye-1, WorldView-1, -2, -3, & -4) provide along-track (i.e.…”