I take it there is actually a mapfile.gnd file?
Tutorial would depend on what you used to make the mapfile.gnd with? The Dem is what you use Microdem or Transdem to create the mapfile.gnd from if thats in the route then assuming there is nothing wrong with it it should work.
Might want to right click and show errors and warnings in case there is something obviously missing?
Tutorial would depend on what you used to make the mapfile.gnd with? The Dem is what you use Microdem or Transdem to create the mapfile.gnd from if thats in the route then assuming there is nothing wrong with it it should work.
Might want to right click and show errors and warnings in case there is something obviously missing?