"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.
Bob Burd - Feb 12, 2007 10:47 pm - Voted 10/10
why so many?"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.
Deb - Feb 12, 2007 10:49 pm - Hasn't voted
Re: why so many?Ah-ha! That's why two of them had numbers and pointing at each other. Thanks Bob!