Cross Validation Scatter Plot

Cross validation in Supervisor takes the form of a scatter plot with the original sample or composite value (denoted by 'z') plotted against the estimated value for the same sample location (denoted by 'z*') plotted on the Y-axis. By default, the original sample value is plotted on the X-axis with the estimated value on the Y-axis. However this can be customised under the Draw tab.

Estimates at each sample location are carried out using Ordinary Kriging. A default search is set up using the modelled variogram ranges and directions, with a minimum of 2 and maximum of 100 samples. Samples from the same drillhole are also used for estimation by default. All of the default estimation parameters can be customised in the Properties tab.

A 1:1 line is plotted by default on the graph and individual points on the scatter plot are colour coded according to whether they plot above or below this line. Error statistics and a linear regression line and equation are automatically calculated and plotted in orange. Display of the point colours, 1:1 line, regression line and error statistics can be customised in the Draw tab.