The accompanying drawing shows ground contours at ten-metre vertical intervals on a map.
(a) On the drawing supplied, draw a vertical section (profile) on the line DE.
(b) A, B and C are outcrop points on the surface of a stratum of ore.
Determine the dip and stnke of the stratum.
(c) Determine whether an object on the ground at F is visible from G which is also on the ground.