Page 14 - MATLAB Recipes for Earth Sciences

4 1 Data Analysis in Earth Sciences

First Road
First Road
Boreholes
Second Road Second Road

Boreholes

a b

Second Road First Road Second Road First Road

Quarry
Samples
Boreholes

c d

Second Road First Road Road cuts

Valley
River Samples

Samples
e

Fig. 1.2 Sampling schemes. a Regular sampling on an evenly-spaced rectangular grid,
b uniform sampling by obtaining samples randomly-located within regular grid squares,
c random sampling using uniform-distributed xy coordinates, d clustered sampling
constrained by limited access, and e traverse sampling along road cuts and river valleys.