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Old 05-27-08, 10:29 AM
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The elevation data is gathered from the USGS. It seems that sometimes the USGS get overwhelmed with requests and the free mapping sites can't get the data required to plot the elevation profile and then do the math for elevation gain.

I got blank pages or no maps being rendered when I "customized" my security settings of my browser (using I.E. 6). Once I went back to the default settings, everything seemed to work again.
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