We’re rewarding the question askers & reputations are being recalculated! Read more.

New answers tagged

1

If you use ACad civil engineering, C3D, it automatically creates contour lines and surfaces from the grid data. One way would be to draw circles from the point, P to the 4 grid points surrounding it and measure their radius, say r1,r2... then a good estimate is $ Z_P= \frac{Z1r1+Z2r2+Z3r3+Z4r4}{r1+r2+r3+r4} $


Top 50 recent answers are included