Hello<br><br><span lang="en"><span>Since I do</span> <span>not have</span> <span>Gocad</span> <span>(</span><span>or</span> <span>others 3D geological modeling softwares</span><span>)</span><span>,</span> <span>I try to do</span> <span>3D modeling</span> <span>in geology with</span> <span>GRASS GIS. </span></span><span lang="en"><span>It works very well</span> <span>for surfaces</span></span> <br>
<br><ul><li>:faults surfaces from contours ( from boreholes and coal mining data):</li></ul><div style="text-align:center"><img alt="Images intégrées 11" src="cid:ii_137d11e1f6bb93f5"><br></div><ul><li>Thrust faults from boreholes data and traces of the faults on geological map:</li>
</ul><div style="text-align:center"><img alt="Images intégrées 2" src="cid:ii_137d10ffa2f43f12" height="205" width="420"><img alt="Images intégrées 6" src="cid:ii_137d117263965312" height="195" width="420"><br></div><br>
<ul>
<li>geological layers and fault (in red) from <span lang="en"><span>boundaries of formations</span> <span>on a geological map (using Eric de Kemp methods in: </span></span><font><span>"Three-dimensional projection of
curvilinear geological features through direction cosine interpolation
of structural field observations", Computers & Geosciences, Volume
24, n° 3 (1998), pages 269-284</span></font> (<a href="http://www.sciencedirect.com/science/article/pii/S0098300497000666" target="_blank">http://www.sciencedirect.com/science/article/pii/S0098300497000666</a>)
or his thesis "THREE-DIMENSIONAL INTEGRATION AND VISUALIZATION OF
STRUCTURAL FIELD DATA: TOOLS FOR REGIONAL SUBSURFACE MAPPING" <span lang="en"><span>(2000) available at <a href="http://bibvir.uqac.ca/theses/12127333/12127333.pdf" target="_blank">http://bibvir.uqac.ca/theses/12127333/12127333.pdf </a></span></span><span lang="en"><span><b>and Maciej Tomaszczyk work </b>at <a href="http://opengeology.pl/index.php?act=category&category_id=5" target="_blank">http://opengeology.pl/index.php?act=category&category_id=5</a>), see <a href="http://www.portailsig.org/content/grass-gis-et-paraview-la-modelisation-geologique-3d-pour-les-demunis-ou-les-enthousiastes" target="_blank">http://www.portailsig.org/content/grass-gis-et-paraview-la-modelisation-geologique-3d-pour-les-demunis-ou-les-enthousiastes</a> (in french)</span></span></li>
</ul><div style="text-align:center"><span lang="en"><span><img alt="Images intégrées 3" src="cid:ii_137d11177bade68e" height="200" width="200"></span></span><br><div style="text-align:left"><ul><li>interpolation of planar geological layers (<b>v.surf.rst</b>) from boreholes data </li>
</ul><div style="text-align:center"><img alt="Images intégrées 4" src="cid:ii_137d113e94810d29" height="161" width="420"><br><div style="text-align:left"><ul><li>and cross sections from the model with nviz "cutting planes"</li>
</ul><div style="text-align:center"><img alt="Images intégrées 5" src="cid:ii_137d115fd9b96715" height="102" width="420"><br><div style="text-align:left"><b><span lang="en"><span>But my problem</span> <span>is to</span> <span>build volumes</span> (raster 3D) <span>from</span> <span>these surfaces. </span></span><span lang="en"><span>I read</span> <span>everything that</span> <span>was</span> <span>available</span> <span>on</span> <span>the series of r3.x modules and VTK with Paraview and the work of </span></span>Sören Gebbert</b><b><span lang="en"><span> </span></span></b><span lang="en"><b><span>but</span> <span>I do not get</span> <span>any results</span> </b><span><b>really satisfactory.</b><br>
<br>For example:<br></span></span><div style="text-align:center"><div style="text-align:center"><span lang="en"><span>from <img alt="Images intégrées 9" src="cid:ii_137d11c3819f54b2">to </span></span><img alt="Images intégrées 10" src="cid:ii_137d11c990fc4f86"><br>
<br><br><div style="text-align:left"><span lang="en"><b><span>Is</span> <span>this</span> </b><span></span></span><span lang="en"><span><b>really</b> </span></span><span lang="en"><span><b>possible ? </b></span></span><span lang="en"><span> (it need</span>s <span>lots and lots of</span> <span>memory</span></span>)<br>
</div>
<span lang="en"><span><b><br></b></span></span><div style="text-align:left"><span lang="en"><span>Many thanks </span></span><br></div></div><span lang="en"><span></span></span></div><span lang="en"><span><br></span></span></div>
</div></div></div> </div></div>