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No website will allow for searching of USGS Marks. Going to this link will allow you to download *DSWorld to search for NGS PID's in a variety of methods, and imports the marks directly into google earth for fast and easy visual searching of NGS Marks. NGS Survey Data Explorer is an interactive map that will find markers in a selected location ...
The National Geodetic Survey is an office of NOAA's National Ocean Service.Its core function is to maintain the National Spatial Reference System (NSRS), "a consistent coordinate system that defines latitude, longitude, height, scale, gravity, and orientation throughout the United States". [1]
An Ordnance Survey cut mark in the UK Occasionally a non-vertical face, and a slightly different mark, was used. The term benchmark, bench mark, or survey benchmark originates from the chiseled horizontal marks that surveyors made in stone structures, into which an angle iron could be placed to form a "bench" for a leveling rod, thus ensuring that a leveling rod could be accurately ...
Benchmarking, also known as benchmark hunting, [1] is a hobby activity in which participants find benchmarks (also known as survey markers or geodetic control points). The term "benchmark" is used only to refer to survey markers that designate a certain elevation , but hobbyists often use the term benchmarks to include triangulation stations or ...
NGVD29 was superseded by the North American Vertical Datum of 1988 , [3] based upon reference to a single benchmark (referenced to the new International Great Lakes Datum of 1985 local mean sea level height value), although many cities and U.S. Army Corps of Engineers "legacy" projects with established data continued to use the older datum. [4]
USGS Logan Pass, Montana Cracker benchmark (9,838 feet (2,999 m)) is located in the Lewis Range , Glacier National Park in the U.S. state of Montana . [ 1 ] [ 2 ] Cracker is a benchmark summit located on a ridgeline 0.5 miles (1 km) northeast of Mount Siyeh .
A benchmark is usually set on the side, marked with the letters "O S B M" (Ordnance Survey Bench Mark) and the reference number of the trig point on a plaque called a "flush plate". Within and below the visible trig point, there are concealed reference marks whose National Grid References are precisely known.
All of the other entries in the table are based on USGS benchmarks (or elevations): in my opinion, we should stick with the 490 foot elevation, for internal consistency. —hike395 10:18, 3 January 2015 (UTC) (Later) On the other hand, the original USGS table that this list article used shows that Fort Reno at 410 feet. This undercuts my ...