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when toggle format what by license comment
Oct 28, 2010 at 14:11 comment added underdark That would look a lot like Mark's suggestion (gis.stackexchange.com/questions/2722/…). It's simpler to do, but there might be trouble distinguishing between different moving objects when their paths overlap.
Oct 28, 2010 at 13:59 history answered Chad Cooper CC BY-SA 2.5