Limiting number of displayed dimensions - plotting elevation from GPS
I am in the process of learning QlikView and have loaded in some data from my Garmin GPS which I use whilst cycling to "play" around with. I am trying to create a graph to plot the elevation during each ride. Every second the Garmin takes a note of the current location (lat and lon), heart rate, cadence, temperature and elevation. Assuming a ride of two hours, that's 7200 data points of elevation. Obviously that is a bit excessive to plot on a chart so I was open to ideas on how this may be achieved. Is there a way to perhaps only plot the elevation points but only display some of the time points to keep the chart tidy?
My thanks in advance for any input. Greatly appreciated.