watershed analysis

skk

Is there an option to generate analysis similar to watershed; all around a defined point  but based on an inclined surface, say 1 degree; need to analyse if inside a valley, can you clear the valley.

JSL

Are you trying to determine the low point of the valley?

coelodonta

In not sure what you're trying to do here but i often just create a square area feature and edit the vertices to get my slope  angle then cut or calculate one surface against another using the combine compare terrain tool

skk

Thanks for your reply. This is to see how a climbing aircraft will clear high surrounding terrain. Watershed analysis finds intersection of a given plane with the terrain. This one would need intersection of terrain with an inverted cone where semi-apex angle of the cone corresponds to the climb gradient (=90-climb angle). 

JSL

I don't know how to do it, but if you could figure out how to make a 3-D model of the cone, maybe you could use the Combine/Compare Terrain Layers or the Create Flattened Site plan functions to see if there are any intersections between the cone and the terrain.