Dear all... I have this kind of data: two parallel lines of tomographic seismic profiles, that means (for who is not a geologist), that I have, along these lines, regularly spaced 3d points (like a vertical grid of points under the earth surface) each one having as an attribute a value of the P waves velocity (P waves are longitudinal seismic waves, high velocity means presence of rocks, low velocity of sand or clay). The house for which I did this research is just in the middle between these two lines (see the next map). I would like to obtain a 3d velocity model of the terrain just under the house.
^ North axis | | | ____________________ Tomograpphic profile1 | _ | |_| house | ____________________ Tomograpphic profile2 | | |----------------------------------- > East axis It is simple to obtain a 3d voxel map of the area under the house (v.vol.rst) but it is not simple to obtain an anisotropic interpolation.... because v.vol.rst doesn't have possibility to define an ellipsoid of the anisotropy as it is possible to do with v.surf.rst. Since, for geological reasons, it is clear that there is velocity continuity (isotropy) along the est-nord plane but not along the Z plane, I would like to know if someone can suggest me a way to solve this problem in grass (3d interpolation with anisotropy), or in case, using some others free-GPL softwares (R?, or there's something else??). many thanks for the time you losed reading this post... :-) Ivan -- Ti prego di cercare di non inviarmi files .dwg, .doc, .xls, .ppt. Preferisco formati liberi. Please try to avoid to send me .dwg, .doc, .xls, .ppt files. I prefer free formats. http://it.wikipedia.org/wiki/Formato_aperto http://en.wikipedia.org/wiki/Open_format Ivan Marchesini Department of Civil and Environmental Engineering University of Perugia Via G. Duranti 93/a 06125 Perugia (Italy) Socio fondatore GFOSS "Geospatial Free and Open Source Software" http://www.gfoss.it e-mail: [EMAIL PROTECTED] [EMAIL PROTECTED] tel: +39(0)755853760 fax (university): +39(0)755853756 fax (home): +39(0)5782830887 jabber: [EMAIL PROTECTED] _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user