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Kodak Elite Exra Color 100â„¢

This is the benchmark that all benchmarks should be benchmarked against.

This is a benchmark with 'bolt' on Acton Trussell bridge. The mark was cut during the Ordnance Survey's first Geodetic Levelling' in the 1840-1860's.

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Exposure: 0.02 sec (1/50)

Aperture: f/3.5

ISO Speed: 200

Focal Length: 50 mm

US Geological Survey Benchmark on top of El Yunque

NEW YORK, NY - OCTOBER 18: President of Newmark Knight Frank, Jimmy Kuhn and David Soles attend Benchmarks NYC at New York Public Library on October 18, 2018 in New York City. (Photo by Noam Galai/Getty Images for Spearhead Marketing Group)

Benchmark taken at the Hatteras Lighthouse........Outer Banks, NC

I think this is an ordnance survey benchmark . The arrow looks like WD markers but with a horizontal line across the top. It's on Urswick Road at the junction with Lower Clapton Road.

 

A mark, the height of which has been determined in relation to Ordnance Data by spirit levelling. The most common is the cut bench mark which appears thus: cut into stone or brick-work.

benchmarks.ordnancesurvey.co.uk/pls/htmldb/f?p=111:3:9195...:

www.levelling.uhi.ac.uk/tutorial1_9.html

Found on a drystone wall next to the trackway that leads to Cote in Walden

A Bench Mark in Cambridge hidden by one of so many bikes

NEW YORK, NY - OCTOBER 18: Senior Managing Director of National Research for Newmark Knight Frank, Jonathan Mazur speaks onstage during Benchmarks NYC at New York Public Library on October 18, 2018 in New York City. (Photo by Noam Galai/Getty Images for Spearhead Marketing Group)

NEW YORK, NY - OCTOBER 18: Managing Director for National Market Research, Alexander Paul speaks onstage during Benchmarks NYC at New York Public Library on October 18, 2018 in New York City. (Photo by Noam Galai/Getty Images for Spearhead Marketing Group)

First snow in Jardin du Luxembourg, Paris.

Confirming that the marker on the Brother outcrop in Alderfer/Three Sisters is not an NGS survey marker (*sigh*) but a Forest Service one. Although pretty battered, the numbers above the triangle in the center appear to be the site's elevation.

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