Home > Public Domain Data > Teaching about spatial data quality

Teaching about spatial data quality

It is important to be critical of data, including, and perhaps especially, spatial data. I frequently receive inquiries from professors seeking resources on the best resources to teach about data quality and foster related discussions with students. Here is one of my recent responses to such an inquiry.

  1. If you need a fun and engaging set of maps and discussion, use my presentation on Good Maps, Bad Maps, and why it all matters: https://sway.office.com/HqKUCu2ib60rkijh?ref=Link. Scroll down to 30% of the way down in this presentation, in the “Maps Tend to Believed” section.  Here you will see a whole set of BAD MAPS. They are misleading, erroneous, or just plain bad for many different reasons – the projection is unsuitable, the data is questionable or impossible (for example, I know it gets hot in Texas but there is a temperature reading from a data feed that is over 3,000 degrees as one example), the legend is misleading, places are blatantly shown in the wrong location, or some other reason.
  2. A short reading on the above topic, why data quality still matters now more than ever:  https://spatialreserves.wordpress.com/2017/12/04/why-data-quality-still-matters-now-more-than-ever/
  3. More food for thought, presented as the “best available data” “BAD data”:  https://spatialreserves.wordpress.com/2017/08/14/best-available-data-bad-data/
  4. A guide for deciding which data will be useful for your needs:  https://spatialreserves.wordpress.com/2018/11/26/a-graphical-aid-in-deciding-whether-geospatial-data-can-be-used/
  5. An essay reflecting on the 30 checks for data errors:  https://spatialreserves.wordpress.com/2015/03/22/gis-gigo-garbage-in-garbage-out-30-checks-for-data-errors/

I hope these resources will be useful to many!

Data quality is a major theme of this blog.

–Joseph Kerski

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  1. Imuwahen Priscilla Aigbedion
    July 27, 2020 at 3:46 pm

    Thanks so much Joseph.You have given me a goldmine.I will update my lecture notes on data quality with these materials you have introduced.

    • josephkerski
      July 27, 2020 at 3:47 pm

      De nada! Glad it will be useful to you! –Joseph

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