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Data Set and Central Challenge: The data I was enhancing was changes in sea surface temperature and also plankton density with time (the two have an important relationship that I won't go into here) during an El Nino event. The central problem of the practical was that dealing with multiple sets of time data is tricky and I planned to have the (400!) students attempt the practical unsupervised so there was no one on hand to help them out if they got stuck. [...]
Read more: http://googleearthdesign.blogspot.com/2008/11/case-study-time-based-data-practical-in.html