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Author Topic: OS Trig Points and Bench Marks in Kent  (Read 27870 times)

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DoverDan

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Re: OS Trig Points and Bench Marks in Kent
« Reply #21 on: August 07, 2010, 18:38:38 »
Trig point at Tolsford Hill near Folkestone.

Offline Glen

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Re: OS Trig Points and Bench Marks in Kent
« Reply #20 on: July 27, 2010, 23:26:56 »
Trig point at Rowdow Hill above Otford (204 metres)



Glen

DoverDan

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Re: OS Trig Points and Bench Marks in Kent
« Reply #19 on: July 09, 2010, 22:46:34 »
I'm guessing this is a rather old trig point. It is located at East Demi Bastion east of Dover Castle close to the cliff edge.



DoverDan

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Re: OS Trig Points and Bench Marks in Kent
« Reply #18 on: May 20, 2010, 21:22:43 »
This trig point is on top of Shakespeare cliff near Dover overlooking Samphire hoe.

Offline Jason

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Re: OS Trig Points and Bench Marks in Kent
« Reply #17 on: April 26, 2010, 21:22:36 »
can i ask what a trig is?

Its a Triangulation point,For measuring distance. :)..........http://en.wikipedia.org/wiki/Triangulation_station
Its from Trigonometry...http://en.wikipedia.org/wiki/Trigonometry.

I saw a programme on these once (and they say I don't know how to live! :) ) and it said that Brigadier Martin Hotine's work was so accurate that working through all the trig points from the west country to the north of Scotland, the total inaccuracy was less than 18 inches.  That's pretty good considering they were using manual instruments to measure all of the angles between the points.

They also had to carry the cement and moulds to cast the trig points up hills and mountains to wherever they were needed.

It seems it was a much tougher job than it seems at first :)

Mind you, we shouldn't be too surprised - Mason and Dixon (of Mason Dixon Line fame) were British, and they did a pretty good job of surveying that - maybe it's something in the water ;)

Jason

DoverDan

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Re: OS Trig Points and Bench Marks in Kent
« Reply #16 on: April 25, 2010, 23:22:31 »
Walked past this bench mark so many times and only spotted it today. It is situated just west of Fan Hole coastal gun battery between Dover and St Margarets.

merc

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Re: OS Trig Points and Bench Marks in Kent
« Reply #15 on: April 14, 2010, 21:16:19 »

DoverDan

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Re: OS Trig Points and Bench Marks in Kent
« Reply #14 on: April 14, 2010, 19:40:12 »
There are a couple of others that I know of, one is on top of Shakespeare Cliff (in the background of my photo). The other is on top of Cheriton Hill in Folkestone. I think these two were installed for the Channel Tunnel workings at Samphire Hoe and Cheriton, the Farthingloe one may have been for the A20 dual carriageway construction in the early 90s.

seafordpete

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Re: OS Trig Points and Bench Marks in Kent
« Reply #13 on: April 14, 2010, 10:17:08 »
Never seen a cylindrical one before-any more about?

DoverDan

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Re: OS Trig Points and Bench Marks in Kent
« Reply #12 on: April 13, 2010, 23:25:26 »
This one is next to the Farthingloe Heavy AA site Dover.

Offline unfairytale

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Re: OS Trig Points and Bench Marks in Kent
« Reply #11 on: January 24, 2010, 19:30:56 »
Dover seafront.


When you've got your back to wall, there's only one thing to do and that's to turn around and fight. (John Major)
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Offline colin haggart

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Trig point
« Reply #10 on: January 23, 2010, 22:43:35 »
I know that on here there is a place to put this, but I cannot find it, parhaps somewone can move this post to the right place please.

I saw on here one of these without any numbers, this one one I took a photo of is in Whitstable.
I did say in another post that they have numbers on them.



Offline unfairytale

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Re: OS Trig Points and Bench Marks in Kent
« Reply #9 on: December 23, 2009, 10:41:22 »
Crete Road East. Folkestone.
When you've got your back to wall, there's only one thing to do and that's to turn around and fight. (John Major)
http://www.flickr.com/photos/unfairytale/sets/

Offline unfairytale

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Re: OS Trig Points and Bench Marks in Kent
« Reply #8 on: December 01, 2009, 23:10:17 »
 This one in Adrian Street, Dover is shown as 77.68 on my old O.S. map (in feet).
When you've got your back to wall, there's only one thing to do and that's to turn around and fight. (John Major)
http://www.flickr.com/photos/unfairytale/sets/

Offline Paul

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Re: OS Trig Points and Bench Marks in Kent
« Reply #7 on: November 19, 2009, 19:01:25 »
can i ask what a trig is?

Its a Triangulation point,For measuring distance. :)..........http://en.wikipedia.org/wiki/Triangulation_station
Its from Trigonometry...http://en.wikipedia.org/wiki/Trigonometry.
Maybe it's big horse I'm a Londoner. :{

 

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