Talk:Benchmark (surveying)

message: I have changed bench mark to benchmark throughout merely for consistency with the title (and the Concise Oxford Dictionary). However, the Ordnance Survey (and Collins Dictionary) spells this as two words.--Shantavira|feed me 18:06, 24 November 2007 (UTC)
replies: text: I recently reverted an anon who went through and "corrected" it all to the two-word variant.  If you think that's a good idea, an RM discussion might be a good way to bring it up, so we keep the title and text in sync.  The USGS is not consistent, but seems to mostly use "benchmark"; see search.  Dicklyon (talk) 22:02, 30 December 2014 (UTC)
replies: text: The USGS disks have two words.  That should take precedence over anything someone in the agency might have written.  See http://surveyorconnect.com/images/uploaded/2014123117361654a434100e73e.jpg BillHart93 (talk) 17:54, 31 December 2014 (UTC)
thread_title: Two words or one?

message: The disambiguation page for the term "fixed point" suggests that this page will explain the term fixed point as used in the context of surveying.  Anyone want to take a crack at that, either here or on a new page named "fixed point (surveying)"?  Once that's done I can point Geodetic network and Meridian arc, which currently points out to the fixed point disambiguation page,  to wherever the explanation ends up.  Thanks!  --Joe Decker (talk) 05:58, 6 May 2010 (UTC)
thread_title:  "fixed point" 

message: I deleted a photo of a carved arrow apparently on Chapel Well in Irvine which the uploader claims is a bench mark. Not only does it not have a datum (an obvious requirement) but it is not listed by the Ordnance Survey and is not shown on any map, the nearest bench mark being on the local church tower. There are several marks, such as crosses, carved on the walls near Chapel Well, this is just another of them.--Shantavira|feed me 16:52, 28 January 2015 (UTC)
thread_title:  Image deleted 

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thread_title:  External links modified 

message: I had not realised until reading this other article and this one that the arrow device on benchmarks originated as it did, i.e. to mark government property - that would be worth including in this article, suitably referenced I think. Geopersona (talk) 17:14, 18 June 2020 (UTC)
replies: text: I'm not convinced that this is the origin of the mark. It could be also be a depiction of a tripod with levelling instrument. Gollem (talk) 18:23, 19 June 2020 (UTC)
replies: text: Or both? Hence the need for a suitable reference . . . cheers Geopersona (talk) 21:48, 19 June 2020 (UTC)

text: The use of the broad arrow as a symbol of the Board of Ordnance is well documented at Broad arrow. It's got nothing to do with a tripod.--Shantavira|feed me 13:34, 27 January 2021 (UTC)
replies: text: The Board of Ordnance and other government agencies didn't use the symbol with the horizontal line like the Ordnance Survey, right? It seems likely that there is a connection between the two symbols, but I didn't see a citation for the assumption that the Ordnance Survey benchmark symbol originated from the broad arrow. And if it originated from the broad arrow, it is possible that the horizontal line was added for the resemplence of a levelling instrument on a tripod. A reliable source would help to clarify. Gollem (talk) 21:55, 27 January 2021 (UTC)
thread_title:  Broad arrow