Uncertainty in GIS


Introduction to Topic

All data and every analysis we do in GIS has some uncertainty associated with it. These can include unreliability uncertainties (e.g. measurement error, resolution, etc.), and structural uncertainties (e.g. methodological choices). Sometimes those uncertainties matter and sometimes they don't. That judgement call can only be made effectively when the purpose of the analysis is clearly articulated and the significance of uncertainty can be appropriately contextualized.

Learning Outcomes

Meets Course Learning Outcomes 2, 3 & 4.

Lecture Materials

Uncertainty in GIS

Geomorphic Change Detection

If you want to learn more about Geomorphic Change Detection see here, or download our software here.

Additional Resources

Some Good References

Web Links:

  • Error, Accuracy and Precision in GIS - A very helpful series of webpages on the basics of errors, accuracy and precision in GIS maintained by Kenneth E. Foote and Donald J. Huebner, The Geographer's Craft Project, Department of Geography, University of Texas at Austin.
  • Uncertainty Propagation in GIS - Curriculum developed by : Gerard B.M. Heuvelink, Faculty of Environmental Sciences, University of Amsterdam.