Creating Detailed Terrain Models in Rhino 8 and Grasshopper

This video tutorial goes through the steps to create detailed terrain models from contour lines in Rhino and Grasshopper. This video uses contour map data from Digimaps. The key steps in this video can be found below: 00:00 - Introduction 00:08 - Data download from digimaps 04:20 - Opening Grasshopper 05:00 - Selecting the contour lines in Grasshopper 05:43 - Extracting points from the curve using 'Control Points' node 06.15 - Flattening the coordinate points 06:55 - Using the 'Delaunay Mesh' node to create a mesh 08:25 - Reducing the mesh density 10:06 - Using the 'Drape' command to create a surface 13:05 - Trimming the edges of the surface 14:02 - Extruding the surface into a 3D closed polysurface 16:15 - Turning this terrain into a drawing using the countour lines and the 'Make2D' command