Draw a Variance Map - Interview

This interview produces the map of ordinary kriging variances for the selected contaminant. When this interview is selected, ordinary kriging is the only available interpolant in the Interpolation Methods step. If OK was not previously selected , SADA will warn the user and automatically change the interpolant to OK for the user.


This interview is available for all analyses that have sampled data (unpooled only), with all data types except Geobayesian. It is only available for the ordinary kriging interpolant.


These are the steps that display in the Steps Window when this interview is selected. Click on the links below for more details about the following steps.

1. See the data

2. Set up the site

3. Set GIS Overlays

4. Set grid specs

5. Correlation Modeling

6. Search neighborhood

7. Show the results

8. Format picture

9. Auto-document

After entering all the necessary parameters for each step, press Show the Results. The following image shows a sample variance map for Arsenic.