Figure 3.

Semivariogram models used by Poisson kriging for mapping lung and cervix cancer mortality. The experimental semivariogram of the risk (red curve) is estimated from county-level rate data, and its deconvolution yields the point-support model (green curve) required by area-to-area Poisson kriging. The regularization of the point support model yields a curve (blue line) that is very close to the experimental one.