Hello, I too am now preparing for my thesis, and before requesting for the education license, I'm doing some homework to save time. I have downloaded the SRTM files and am now digitizing the maps for roughness. 1 - Could I please check if it is possible to combine these two maps in Map Editor or should I wait till I have access to WAsP to combine them? Additionally, I have read N.G.Mortensen's reply above indicating that power and thrust curves/coefficients are required to calculate the yield--I managed to get the power curves. 2-I have been rather unsuccessful in retrieving thrust coefficients--is there any work around this as commercial manufacturers of wind turbines are not readily parting with this information. I plan to calculate the wake loss in order to calculate the WAsP Net Production of Wind Farm