680 Lab 3 - At long last, kriging
Objective: The lab's main objective is examining how
the several software packages (Surfer, ArcGIS (Geostatistical
Analyst), and R (geoR?) present implement kriging by
interpolating (estimating) surfaces from one of our data sets.
Just one variable this time:
- Broom's Barn Farm - (log transformed) exchangable Potassium
Replicate, as well as you can, the surfaces of exchangable potassium
and of estimation variances for both "punctual" and 10 m by 10 m
"block" kriging (Webster and Oliver, Figures 8.14 - 8.21),
in each of our three programs (Surfer, Arc, R).
(Do the models Webster and Oliver used seem to be the best fit(s)?
Are others better?)
Compare the results from the three environments. Are they
producing the same or similar results? Do they all look
like what (apparently) Genstat did?
(You may want to calculate difference surfaces to facilitate
A brief (maximum 5 pages) report addressing your assessment
of the comparison.
Due: in two weeks.