Figure 4

Output semivariogram file created by poisson_kriging.exe following the analysis of pancreatic cancer mortality rates. This output file, called pancreasvariog.txt, includes the semivariogram risk values computed using 15 classes of 20 km, in four directions with the first direction azimuth starting at 22.5° measured clockwise from the NS axis. This file was created by poisson_kriging.exe using the additional files 1 and 2. The parameters of the semivariogram model are copied into the parameter file pfield.par required for p-field simulation (Figure 2).