Surfer is a 3D visualization, contouring and surface modeling package
Surfer software is a full-function 3D visualization, contouring and surface modeling package. Surfer is used extensively for terrain modeling, landscape visualization, surface analysis, contour mapping, 3D surface mapping, gridding, volumetrics, and much more.
I am a geologist looking to test Surfer.
Surfer for education
Very nice app for drawing.