Create a PENZ space-delimited point file containing point information and use the file to create or add data to a surface in Autodesk Civil 3D.
An example of a PENZ space-delimited point file:
# Autodesk Point File Format 3 379.910000 511.270000 227.620000 4 393.880000 497.100000 225.750000 5 382.640000 464.050000 223.890000 6 403.690000 429.340000 222.880000 103 190.080000 307.560000 194.250000 104 182.090000 322.940000 194.940000 105 174.100000 338.320000 195.630000 106 142.910000 340.320000 203.030000 107 117.470000 342.780000 208.460000 108 124.430000 394.400000 208.410000 109 137.700000 400.690000 205.430000