2.1 VIEWSHED ANALYSIS OF MOUNTAIN SKYLINE
Using an ArcView GIS program, we firstly calculate the viewshed of each
typical point of the mountain skyline. Then we overlay the visible maps to
find the ratio and distribution of the superposition of these visible scopes.
Those data demonstrate the continuity of the characteristic points, the
integrity of the whole skyline, and the identifi ability of typical skyline
formation.