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Ordnance Survey Trigpoints.
- Cornishpete
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27 Apr 2009 14:08 #21
by Cornishpete
Replied by Cornishpete on topic Ordnance Survey Trigpoints.
Denis, I'm thinking that as the trigpoints would always be constructed on open and unobstructed ground with views to the other two(3?) related triangulation points in the Ordnance Survey system then the type of location that an airfield already existed on or was built later on (WW2) would be ideal. Sawbridgeworth would be an example of the former and Hunsdon the latter.
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- Denis
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27 Apr 2009 21:13 #22
by Denis
Replied by Denis on topic Ordnance Survey Trigpoints.
A fair point Cornishpete. I wonder if this fits anywhere in to the Air Ministry's pre-war survey for suitable airfield sites.
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- Dave Smith
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05 May 2009 15:00 #23
by Dave Smith
Replied by Dave Smith on topic Ordnance Survey Trigpoints.
When I worked at Coventry Airport (Baginton) in the 1970s, the OS installed a trig point on the northern perimeter. I presume the airport authority knew about it but nobody told my boss, the SATCO (Senior Air Traffic Controller). He muttered about this "plinth" for days and I irritated him even further by misquoting an old song: "Someday my plinth will come."
Sorry folks!
Seriously, this is a very informative thread.
Sorry folks!
Seriously, this is a very informative thread.
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- Peter Kirk
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05 May 2009 15:18 #24
by Peter Kirk
No Amount Of Evidence Will Ever Persuade An Idiot (probably not Mark Twain)
Replied by Peter Kirk on topic Ordnance Survey Trigpoints.
Slightly bored so I decided to look for the Coventry Airport trig point on the OS map. Then I realised I had forgotten what the symbol was.
Found the the symbol on OS site (feint blue triangle with dot in centre).
Couldn't find one near the Airport so I wonder if it was removed (extended over) or not marked on the map? Or just that I couln't find it.
I used to know all the OS symbols and could usually pinpoint my position on the map quite accurately when out walking. Even an ETA to within +/- a few minutes. Life is so much easier now with GPS and mobile phones.
Found the the symbol on OS site (feint blue triangle with dot in centre).
Couldn't find one near the Airport so I wonder if it was removed (extended over) or not marked on the map? Or just that I couln't find it.
I used to know all the OS symbols and could usually pinpoint my position on the map quite accurately when out walking. Even an ETA to within +/- a few minutes. Life is so much easier now with GPS and mobile phones.
No Amount Of Evidence Will Ever Persuade An Idiot (probably not Mark Twain)
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09 Jan 2017 20:04 #25
by Peter Kirk
No Amount Of Evidence Will Ever Persuade An Idiot (probably not Mark Twain)
Replied by Peter Kirk on topic Ordnance Survey Trigpoints.
The quadrant tower at Berners Heath contained a trig rivet, until it was demolished (when?). I looked at the list of all trig point from a CSV available here
www.whatdotheyknow.com/request/291684/re...archive.csv.txt.html
(Probably the one available for download here: www.ordnancesurvey.co.uk/benchmarks/)
There are a surprising number of airfield control towers listed and many with destroyed dates. I haven't check other locations but Pembrey range tower is there.
www.whatdotheyknow.com/request/291684/re...archive.csv.txt.html
(Probably the one available for download here: www.ordnancesurvey.co.uk/benchmarks/)
There are a surprising number of airfield control towers listed and many with destroyed dates. I haven't check other locations but Pembrey range tower is there.
No Amount Of Evidence Will Ever Persuade An Idiot (probably not Mark Twain)
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- Evelyn
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09 Jan 2017 20:54 #26
by Evelyn
There are two: trigpointing.uk/trig/7814 and trigpointing.uk/trig/8133
Replied by Evelyn on topic Ordnance Survey Trigpoints.
Slightly bored so I decided to look for the Coventry Airport trig point on the OS map. Then I realised I had forgotten what the symbol was.
Found the the symbol on OS site (feint blue triangle with dot in centre).
Couldn't find one near the Airport so I wonder if it was removed (extended over) or not marked on the map? Or just that I couln't find it.
There are two: trigpointing.uk/trig/7814 and trigpointing.uk/trig/8133
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- mbriscoe
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10 Jan 2017 16:37 #27
by mbriscoe
Have a look here!
Ordnance Survey Characteristic Sheets
Mentioned in the latest issue of
Cairt: the newsletter of the Scottish Maps Forum
Replied by mbriscoe on topic Ordnance Survey Trigpoints.
Slightly bored so I decided to look for the Coventry Airport trig point on the OS map. Then I realised I had forgotten what the symbol was.
Found the the symbol on OS site (feint blue triangle with dot in centre).
Couldn't find one near the Airport so I wonder if it was removed (extended over) or not marked on the map? Or just that I couln't find it.
I used to know all the OS symbols and could usually pinpoint my position on the map quite accurately when out walking. Even an ETA to within +/- a few minutes. Life is so much easier now with GPS and mobile phones.
Have a look here!
Ordnance Survey Characteristic Sheets
Mentioned in the latest issue of
Cairt: the newsletter of the Scottish Maps Forum
The following user(s) said Thank You: Peter Kirk
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- PJH
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10 Jan 2017 20:54 #28
by PJH
Replied by PJH on topic Ordnance Survey Trigpoints.
One airfield not mentioned yet with a trig column is at Silverstone. This has been turned into a memorial for a Halifax crash there.
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- Evelyn
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11 Jan 2017 11:14 #29
by Evelyn
Here it is: www.geograph.org.uk/photo/4592249 - www.geograph.org.uk/photo/4592253
Replied by Evelyn on topic Ordnance Survey Trigpoints.
One airfield not mentioned yet with a trig column is at Silverstone. This has been turned into a memorial for a Halifax crash there.
Here it is: www.geograph.org.uk/photo/4592249 - www.geograph.org.uk/photo/4592253
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- WILLIAMARNOLD
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15 Jan 2017 13:20 #30
by WILLIAMARNOLD
Baginton/Coventry Airport Trig points
The trig Point you were looking for may or may not still be there but there have been two trig points close to the boundary of the airport.
If you look at the map there is one above the burial in " Saxon Burial Ground " and another by the range of buildings to the right.
The map is sheet SP 37 scale 1:25000 1952 edition reprinted with minor corrections 1958 it was compiled from 6 inch sheets last fully revised 1903-23 with partial systematic revision 1938 -50
Obviously the revisions did not cover the Airport being built ,RowleyLane being removed or a gravel pit being filled in.For those not local to Coventry the airport runway is approximately where Rowley Lane is mapped.
Long ago and far away
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Replied by WILLIAMARNOLD on topic Ordnance Survey Trigpoints.
Baginton/Coventry Airport Trig points
The trig Point you were looking for may or may not still be there but there have been two trig points close to the boundary of the airport.
If you look at the map there is one above the burial in " Saxon Burial Ground " and another by the range of buildings to the right.
The map is sheet SP 37 scale 1:25000 1952 edition reprinted with minor corrections 1958 it was compiled from 6 inch sheets last fully revised 1903-23 with partial systematic revision 1938 -50
Obviously the revisions did not cover the Airport being built ,RowleyLane being removed or a gravel pit being filled in.For those not local to Coventry the airport runway is approximately where Rowley Lane is mapped.
Long ago and far away
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