Page 124 - Statistics and Data Analysis in Geology

I
Spat ia Ana I ysis

Figure 5-1. Search for an elliptical target with major semiaxis a and minor semiaxis
b. (a) Using a parallel-line search of spacing D. (b) Using a grid search with spacing
D1 in one direction and Dz in the perpendicular direction.

Figure 5-2. Probability of intersecting a target with a systematic pattern of search. Shape
of target may range from a circle to a line; elliptical targets of various axial ratios fall
in the shaded region. Horizontal axis is ratio (major dimension of target)/(spacing
between search lines). (a) Parallel-line search pattern. (b) Square-grid search pat-
tern. After McCammon (1977).

297