Hi @mvitelletti , some of these details were discussed in this thread, in particular the difference between REI_VX and V10PCT_X: InVEST Coastal Vulnerability toolbox - How to use personalized wave and wind data? - #8 by Thodoris
“V” is for “velocity”. “PCT” is for “percentage”, also referred to as “proportion” in the User Guide Appendix B.
All of the columns listed in that Appendix B are required by the InVEST model. Please let us know if you have further questions. Or maybe @Thodoris even has some methods to share, since they were also building this dataset for the Mediterranean?