The Edge: addition of TP

General discussion about trigpoints, the TrigpointingUK website etc

The Edge: addition of TP

Postby THE CYCLIST » Sun Feb 07, 2016 7:48 pm

I have noted that the Website has instances of two loggable TPs at very close proximity. Eg TP0371 and TP10119 are for the current pillar and the site of the previous destroyed pillar at Gedney Drove End, just visited by Perigrinus. At grid ref SU195427 there is TP0742 a pillar and TP8928 a buried cannon. At grid ref SU499653 there is a current pillar and toppled predecessor (TP3492 and TP7431) at Greenham Common near Newbury. I have visited each, but as is my preference, only logged the visible pillars, standing and toppled.
In Derbyshire I have visited The Edge at SK077894, where there is an upright and a toppled pillar, but only the former has a log page as TP6378. There are posted photos to verify. Could a new TP be created to log the toppled pillar?
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Re: The Edge: addition of TP

Postby ted » Mon Feb 08, 2016 6:35 pm

Hi,

FWIW, I suspect that two pillars at Gedney Drove End were regarded as separate stations by the
OS in that they were allocated different Flush Bracket numbers. Likewise for the pair at
Greenham/Greenham Common.

But in the case of The Edge, there is a single OSGB36 record in which the original pillar
was computed in 1936 then marked as destroyed and recomputed in 1945. The evidence
from visits suggests that the Flush Bracket was transferred to the replacement pillar. So
it seems that the OS regard the rebuild as the same trig station and so the Trigpoint record
matches this.

Regards
Ted
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Re: The Edge: addition of TP

Postby THE CYCLIST » Mon Feb 08, 2016 9:20 pm

Thanks Ted.
However, the Website also includes and allocates TPs for oddities:-
TP12707 "Robs Pillar" a recently manufactured private replica,
TP7577 a 2/3 scale wooden pillar in the National Library of Scotland,
TP7503 Whelford, Cirencester an OS pillar at the entrance to a former factory moved from an unknown original location (originally found by myself!)
so even if only a single OSGB36 record exists, a second Website entry should be possible.
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Re: The Edge: addition of TP

Postby spargazer » Sun Feb 14, 2016 7:26 pm

THE CYCLIST wrote:I have noted that the Website has instances of two loggable TPs at very close proximity. Eg TP0371 and TP10119 are for the current pillar and the site of the previous destroyed pillar at Gedney Drove End, just visited by Perigrinus. At grid ref SU195427 there is TP0742 a pillar and TP8928 a buried cannon. At grid ref SU499653 there is a current pillar and toppled predecessor (TP3492 and TP7431) at Greenham Common near Newbury. I have visited each, but as is my preference, only logged the visible pillars, standing and toppled.
In Derbyshire I have visited The Edge at SK077894, where there is an upright and a toppled pillar, but only the former has a log page as TP6378. There are posted photos to verify. Could a new TP be created to log the toppled pillar?



TP10119? is this a valid figue?
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Re: The Edge: addition of TP

Postby ted » Mon Feb 15, 2016 9:19 am

TP10119? is this a valid figue?


Yes, its a valid reference to a record in the Trigpointing database.
Heres a link: http://trigpointing.uk/trig/10119 which had flush bracket S8702
Likewise for its replacement http://trigpointing.uk/trig/371 with flush bracket 10673

Regards
Ted
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Re: The Edge: addition of TP

Postby THE CYCLIST » Thu Apr 21, 2016 8:47 am

This week there have been visits logged to co-ordinates where there are two TPs loggable.
TP7475 is a toppled pillar with TP0694 its adjacent replacement.
TP10046 has gone to be replaced by TP5653.
I still think The Edge merits a second entry on this website to record the toppled pillar. It may be that the Flush Bracket was transferred, or there was no second entry on the OS database, but entries on the Website are not solely guided by this as I pointed out.
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Re: The Edge: addition of TP

Postby peregrinus » Thu Apr 21, 2016 1:42 pm

There are many instances where pillars were rebuilt insitu re-using the original FB.

Custom and practice on TPUK is to include as a second trig where a new FB was used; not to do so where the original FB was re-used.

FWIW I think that's a sensible approach.
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Re: The Edge: addition of TP

Postby agentmancuso » Thu Apr 21, 2016 6:59 pm

TP numbers are allocated to a) separate stations, or b) separate FB numbers. Not to stations or FBs that happen to have been moved.

It's true that there are a handful of oddities left on T:UK, some more worthy than others. But none are moved pillars, with (AFAIK) the sole exception of TP7503 Whelford; this entry only exists by virtue of the pillar's unknown provenance. If the original site could be identified, then the records would be merged and the distinct TP number would promptly disappear.
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