Orthoimagery used to analyze elevation changes and vegetation regrowth

A series of 4 images illustrating how orthoimagery can be used to analyze elevation changes and vegetation regrowth.. 1) 3D image of valley with road running through it, 2) close up 3D image showing vegetation and structures, 3) Image 1 with color gradient to represent elevation, 4) Image 2 with color used to highlight the presence of vegetation.