Contours2Mesh
Build 3D triangular fault surfaces from elevation contours, with adjustable mesh spacing and GeoJSON output.
Contours2Mesh builds nonplanar 3D fault surfaces from two or more manually drafted contours. Reorder or exclude contours, set point spacing in kilometers, and generate a MultiPolygonZ mesh as a temporary layer or a GeoJSON file. The meshing library resamples contours and interpolates between them before connecting adjacent points into triangles.
Inputs must be single LineString or LineStringZ features in a geographic longitude/latitude CRS (EPSG:4326 recommended), with at least four vertices per contour and consistent digitizing direction. Supply elevations in meters through vertex Z coordinates or a numeric elev field. Order contours from top to bottom; a draped surface trace may need manual reordering. Multipart lines must first be converted to singleparts.
Requires NumPy >=1.20 in the Python environment used by QGIS (normally included with QGIS). GeoPandas, SciPy and Shapely are not required by the plugin. These dependencies are not bundled or installed automatically; see the README in the source repository for installation instructions. The BSD-licensed CFM-ccfm meshing source is bundled. CrossSectionDigitizer and Qgis2threejs are optional companion tools.
CRESCENT original code is BSD-3-Clause; retained Plugin Builder scaffolding is GPL-2.0-or-later. QGIS and PyQt retain their own licenses; use with the GPL edition of PyQt is subject to GPLv3. See LICENSE, THIRD_PARTY_NOTICES.md and licenses/.