This add-on software for AUTOCAD and BricsCAD performs triangulation of points, creates isolines and KML files, calculates the volume of 3dface entities, loads XYZ point files, measures surface flatness, and generates sections in both 2D and 3D.

You'll also appreciate the ability to load and draw XYZ files formatted as Number X Y Z Code, with drawing options including POINT, 3DPOLY, SPLINE, or BLOCK entities based on a modifiable library of codes. And best of all, you can triangulate millions of points on the convex hull without any issues!
To help visualize your data, you can generate interpolating isolines with color-coded legend markers. For better visibility, isolines with Z that's a multiple of a value can be drawn thicker, and you can also define a clipping parallelepiped for isolines.
If you're dealing with 2D POLYLINE projections, you're in luck too, as you can easily make projections over a triangulation and generate cross sections and longitudinal profiles. Even polylines containing arcs can be used for this, making this a versatile and powerful tool for any designer or drafter.
To help generate color-filled contour maps, you can even import and export LandXML file types. And for those wanting to take things to the next level, the tool even allows you to draw your DWG file in Google Earth, and generate a 2D or 3D KML file type. It works with any projected coordinate system from any part of the globe, making this a top-notch addition to your CAD toolbox!
Version 2.3: It can be purchased with 1 year subscription.