Hi Ander,<br> You are not forced to work with only excel files. FEFLOW has a variety of file formats in 2D/3D and support several industry file formats. The most popular formats within the users are&nbsp;Shapefiles and text files (*.dat). The data is interpolated at each of the FEFLOW nodes, for this operation the user requires a vector file rather than a raster.<br> <br> Our technical support can give you some hints about this. You can reach them at mike@dhigroup.com.<br> <br> Cheers<br> Carlos<br> <br> &nbsp;