Contour Plot - Damage to Circular Room and Pillar Mine

This is an Igor Pro contour plot of a circular room and pillar mine that has been damaged by a nearby explosion. The contour lines show the measured floor to ceiling closure. In this plan view, the pillars are the dotted squares; the orthogonal corridors between the pillars have been mined out. We made extensive use of the drawing layer to draw the mine in the background, and we removed the axes because they didn't add anything.

Submitted by: Richard W. Klopp, SRI International