Point map:

Select an input point map. Open the list box and select the desired input map, or drag a point map directly from the Catalog into this box. You should select a point map with an ID domain that has a linked attribute table. The attribute table should contain at least 2 columns with a value domain. You can also select a point map with a class domain and a linked attribute table.

Column A:

Select a column with a value domain that you want to use as the first variable.

Column B:

Select a column with a value domain that you want to use as the second variable.

For many points, there should be measured values both for Column A and Column B. The variables in Column A and Column B should be highly correlated (positive or negative).

Lag spacing (m):

Type a value that will be used for the distance classes (real value > 0). The output table will contain a Distance column with multiples of the specified lag spacing; these values represent the middle values of actual distance classes. When the variables were sampled at regular distances, you can enter this distance as the lag spacing.

Use spherical distance:

Select this check box to calculate with spherical distances, i.e. distances are calculated over the sphere using the projection of the coordinate system of the input point map. It is advised to select this option in case your map covers a relatively large area, or when you are working in LatLon coordinates. For more information, see Cross variogram : functionality.

Clear this check box to calculate with planar (Euclidean) distances.

Output table:

Type a name for the output table that contain will the experimental semi-variogram values of the variables A and B and the experimental cross-variogram values of AB.

Description:

Optionally, type a description for the output table. The description will appear in the status bar of the Main window when moving the mouse pointer over the table in a Catalog, and in the title bar of a table window when the output table is displayed. If no description is supplied, the output table will use its own definition as description.