Figure 3From: Accounting for regional background and population size in the detection of spatial clusters and outliers using geostatistical filtering and spatial neutral models: the case of lung cancer in Long Island, New YorkResidual semivariograms for male and female lung cancer. The regional background displayed at the bottom of Figures 1 and 2 is subtracted from the maps of SMR data, and the spatial variability of these residuals is characterized by population-weighted semivariograms computed in four directions.Back to article page