Which is best to use for calculating Aspect of a point /transect line... a 10 m DEM or a 30 m DEM? Would you use bilinear interpolation or or another type of method? The transects range from 60-100 m long with multiple transects running perpendicular to the center transect; those transects range from 1 m out to approx. 40 m out from the center transect. (see attached) Topography is a mountain cove. Trying to determine the best method for calculating aspect values that are meaningful on the landscapes that we are dealing with.