What's the best way to symbolize date data?
I'm currently trying to figure out the best way to symbolize date data. The data that I'm working with is associated with a sample point which was sampled yearly, but not all sample points were sampled in the same amount of years. For example, one point was sampled only in 2002, while another point was sampled in 2002, 2003, 2005 and 2007. I originally tried to symbolize this with a pie chart, but it gives the impression of quantity. I was thinking of working with proportional symbols and just base the symbology on a count of the years rather than the actual year numbers themselves. Any suggestions?
Mapping Center Answer:
One way to go about this is to use "Small Multiples", where you make a small map of the data for each given year and present the maps in sequence. Your instructor should be able to give you some background material on Small Multiples. Another possibility is to create an animation; which would allow you to have more detail, but would also be a good bit more work for you.
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