Hi,
I am trying to calculate the 2D and 3D surface area usingfrom DEM
3D Analyst Tools-> Functional Surface-> Surface volume
input surface = DEM ( datum : WGS84, (both Horizontal and vertical) Units= meters
Reference Plane = ABOVE
Plane height = 0
Z Factor= 1
I observed, the 2D and 3D areas are not correct.
Then I created a 3D simulated surface
size: width = 241, height = 239, pixel size = 1 meter
First I have checked the 2D area before varifying the 3D area:
The 2D area is supposed to be = 57599 sq.m, but from Suface volume function 2D area = 57120 sq.km
Pl. help .
Venu_koppaka