Given the values of a number of discrete, individual locations, the Kriging algorithm interpolates the value of each location in a region containing input locations. Due to resource constraints (e.g. number of responders), it is not realistic to collect a sample from every person who was potentially radiated and needs treatment in the area where the nuclear scenario occurred. Therefore, the Kriging result of a sample set illustrates a fast estimation on the impact of the nuclear event, computationally inferred from the small number of samples.
To perform Kriging on a sample set, first select the dose version (i.e. the combination of a curve and an image selection model) you want to use, then click the ‘Perform Kriging’ menu item under the ‘Kriging’ menu. If it is the first time to perform Kriging on the dose version of the sample set, a progress dialog will appear. The Kriging result will be displayed on the map using the same colors (i.e. dose ranges) in the legend. You can use the ‘Kriging result’ checkbox in the bottom-right panel to control the visibility of the Kriging result on the map (see the following figure).
If the sample set has multiple dose versions under different curves/image selection models, then these different doses versions will produce different Kriging results. To perform Kriging on another dose version, first select it in the drop-down list within the ‘Sample locations’ pane, then click the ‘Perform Kriging’ menu item. The second Kriging result will also appear in the drop-down list within the ‘Kriging’ pane (see the following figure). You can change the Kriging result being displayed on the map using this drop-down list.