EMPIRICAL VARIOGRAMS

EMPIRICAL VARIOGRAMS - ESE 502 Tony E. Smith EMPIRICAL...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
ESE 502 Tony E. Smith EMPIRICAL VARIOGRAMS 1. Basic Idea. A typical plot of all distinct squared-difference pairs,   2 () ( ) ij ys , is shown in Figure 4.20 below. This plot, called the variogram cloud , typically contains thousands of points. [For example, if there are only 100 n points ( : 1,. ., ) i si n in the given pattern, there are ( 1) / 2 100(99) / 2 4950 nn  distinct point pairs.] The essential structure of this dense cloud of points is often difficult to see (i.e., one “can’t see the forest for the trees”). Hence it is often desirable to aggregate these into a smaller number of “representative” points that better displays the overall structure. The standard aggregation approach produces an empirical variogram , as exemplified for Figure 4.20
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/14/2011 for the course ESE 502 taught by Professor Ese502 during the Fall '08 term at UPenn.

Ask a homework question - tutors are online