How can I interpolate depth/thickness data from karst conduits to generate a 3D map of the conduit network in how can I interpolate depth/thickness data from karst conduits to generate a 3D map of the conduit network using the Golden Software Surfer? I have all the data from tubular wells that intersected subsurface conduits (X, Y, and Z = conduit top and Z = conduit base).? I have all the data from tubular wells that intersected subsurface conduits (X, Y, and Z = conduit top and Z = conduit base).