Reply to "Elevations above Sea Level"

bobthurstonMember

The Marine Corps Marathon web site had a course profile on it, so I zoomed in to where I could read the elevations and printed it out to study it. It was painfully inaccurate-- it showed the start to be around 50 ft (USGS map gives 30; the profile gives a high elevation on Lee Hwy at around 180 ft (240+ ft from USGS); shows East Potomac Park somewhere between 30 and 40 feet (it's about 10); and so on. I never did find out how the profile was created-- I had the feeling that the problem may have come from a scaling error arising when they exaggerated the vertical scale for profile purposes. But after reading about Pete's experience I am wondering if the problem came from one of the software packages that give elevations (??)

11/17/047:02 PM

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