Available with Geostatistical Analyst license.
Directional autocorrelation may exist in your data and can be accounted for by incorporating anisotropy in the semivariogram model.
As you perform the steps below, watch the scatter of the points in the semivariogram around the model. If the points are close to the line in one direction and are spread out in another, there may be a directional autocorrelation in your data. The exploration for directional autocorrelation using the search direction, in conjunction with the directional indicator in the semivariogram map, is only graphic (around the isotropic fitted model). To fit a model with directional autocorrelation, check the Anisotropy box.
- Set Show search direction in the View Settings panel to True.
- Click the up or down arrow of the Angle control to explore for the desired directional angle.
- Alternatively, in the semivariogram map, click and hold the middle blue line and drag in the desired direction.
- Click the up or down arrow of the Tolerance control to adjust the angle of tolerance.
- Alternatively, in the semivariogram map, click and hold either of the red directional indicator lines and drag to the desired angle.
- Click the up or down arrow of the Bandwidth control.
- Alternatively, in the semivariogram map, click and hold either of the red lines located on the bounding square and drag to the desired width.