Interpolation and Geostatistical Modelling in ArcGIS


This lab teaches you how to do interpolate surfaces and do geostatistical modelling in ArcGIS.   


You will use the following Acrobat book called Using ArcGIS Geostatistical Analyst to do the exercise.  Read Chapter 1 and do the Quickstart Tutorial exercises in Chapter 2. Answer the following questions and produce the following outputs.  Add them to your web page:
  1. Are the mean and median values of the ozone layer similar?  What does this tell you?
  2. Click on the histogram bar with the lowest ozone values.  Where are the lowest ozone levels located in California?
  3. What can the QQ Plot tell you when you are looking at one variable?
  4. What does the trend analysis graphic tell you about the East-West and North-South trends in ozone levels in California?
  5. What do the X and Y axes of a semivariogram represent?
  6. What does each dot in a semivariogram represent?
  7. What does the search direction tool tell you within the semivariogram?
  8. In Exerercise 2, you created a histogram, a QQ Plot, a trend analysis graphic, and a semivariogram.  Each one of the dialogs for these ESDA tools has a button called Add to Layout.  Add all of these graphics to the layout with the interpolated ozone surface, put your name on it with a text box, and make a PDF file.
  9. What is binning?
  10. What does flattening of a semivariogram indicate?
  11. What is anisotropy?
  12. What is the objective of cross-validation?
  13. What is prediction error and how do you measure it?
  14. What is a prediction standard error map?
  15. PDF a map of the krigged ozone surface with the trend removed at the end of the exercise.  Include your name and appropriate text.
  16. Produce a standard error map of the krigged surface.  Include your name .
  17. How do you use the cross-validation comparison dialog to compare surface models?