What is the difference between Area and Surface area

#1

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#2

Area is 2D area looking down. Surface area is 3D area of surface inside region.

#3

Area is the 2d plane. Surface area is a 3d measurement that includes the elevation changes which is why it is always larger. Basically a 3d surface is a bunch of triangles that connect the points from the point cloud together and a surface area is the sum of all the areas from those individual triangles.

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