**Objective: ** The lab's main objective is try
co-kriging (in ArcGIS Geostatistical Analyst, but
you can try R or Surfer instead if you like) to
see whether it improves estimation or estimation variance.

**Data: **
Just one data set this time:

- JURA - log(Cd) and log(Zn)

**Tasks: **

- Estimate the (log) cadmium (prediction) surface and the prediction standard error surface using just the cadmium data.
- Then get both the prediction and standard error surfaces for the (log) cadmium using the (log) zinc data and co-kriging.
- Compare the the estimation surfaces and the estimation variance surfaces.
- Did co-kriging improve either surface? Was it worth it?

**Deliverable: **
A brief (maximum 5 pages) report addressing your assessment
of the comparison.

** Due: ** in two weeks.