Small demonstration of how to display geo located time registrations from an adventure race using Goggle maps with KML overlay and heat maps.
Demo: http://www.elfisk.dk/allitrack/CheckpointAnimation.html
Implementation:
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Read CVS file with checkpoint/team/time registrations
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Read KML file with checkpoint locations
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Create Javascript file containing time framed data of all teams geo location at any given time (modula the sampling frequency)
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Include Javascript data in HTML page and show KML overlay together with heat maps for the number of teams at any given checkpoint/time.