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| Bob Burd | why so many? | |
Voted 10/10 | "Three geo-markers dated 1939 dot three separate rock croppings, I can find no historical explanation." This is common on quite a few summits. Someone explained it to me about a year ago, a regular USGS BM'ing fanatic: They often put multiple benchmarks to aid in locating the correct point from which previous measurements are made. The measurement benchmark will have a small triangle at the center of it, while the others will have an arrow pointing in the direction of the proper BM. This is helpful if there are a number of rockpiles to be climbed. Note that the USGS isn't generally interested in taking measurements from the highest point, but rather from a point that has good unobstructed views for triangulation. | |
| Posted Feb 12, 2007 10:47 pm | ||
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| Deb | Re: why so many? | |
Hasn't voted | Ah-ha! That's why two of them had numbers and pointing at each other. Thanks Bob! | |
| Posted Feb 12, 2007 10:49 pm | ||
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