RTOPO Animated Demo
Simple, powerful and inexpensive CAD software for surveying. You can do triangulation, isolines, color-filled contour maps, sections, intersections, volume and much more. You can represent 4D points cloud and process hundreds of thousands of points or triangles, even on less powerful PCs.
Are presented here, all RTOPO commands, how to enter data and 3D graphical representation.
If you can not see the video, use this direct link!