View Full Version : OS Extras / POI

20th August 2008, 10:41 PM
GPS compatible location data for surviving OS pillars is now freely available from a variety of sources such as here (http://www.haroldstreet.org.uk/waypoints.php?hill=trigpoints) or the excellent Open Source mapping here (http://www.ukgeocachers.co.uk/garminoverlays/index.php) . But I've found comparable information about the many destroyed pillars and miscellaneous bits of surveying furniture is harder to come across, so I've put together a file containing as much detail as I've so far managed to piece together.

I've uploaded a .csv file to a new 'OS Extras' folder in the 'Files' part of the yahoo Trigonomy (http://groups.yahoo.com/group/trigonomy/) group. It is aimed mainly at users of Garmin etrex GPS receivers (such as etrex Vista/ Legend etc) who want to store this information on their handset without being restricted to using the limited numbers of 'Waypoints' available. The file contains 4 columns (Lon, Lat, Name, Description)and so can be dumped straight into Garmin's POI loader. Also included are a .bmp file to go into the POI with the main file, and an .xls spreadsheet with running totals for the various categories included. I'm fairly sure that the data could be uploaded to other GPSr brands without too much trouble.

Currently included in the file are location data for:

Active Stations 144
Berntsen 99
Block 14
Bolt 94
Buried Block 4
Centre 1
Concrete Ring 6
Curry Stool 9
FBM 204
Fenomark 2
Ferrule 1
Gravity FBM 4
Non-OS Pillar 15
OSPillarExtant 26
OSPillarMissing 483
Rivet 130
Surface Block 202
Trig Station 10

giving a total of 1448. Much of this data is derived directly from TUK (http://www.trigpointinguk.com/) , Bench-Marks (http://www.bench-marks.org.uk/) or the OS (http://www.ordnancesurvey.co.uk/oswebsite/gps/osnetfreeservices/about/overview_osnet.html) . It's been jigged about a bit with GSAK (http://gsak.net/) . I will be updating the file to cover as much of the passive stations database as I can find sensible coords for at a later date.
There will very possibly be a number of inconsistencies or inaccuracies - please let me know of any that you spot, or indeed any other suggestions or comments.



Bear and Ragged
21st August 2008, 08:32 PM
Ta muchly! :applause:

Now I'll never get to bed early tonight... :p

24th August 2008, 08:12 AM
Ta muchly! :applause:

Now I'll never get to bed early tonight... :p

Glad you found it useful.

OS Extras (http://groups.yahoo.com/group/trigonomy/files/Data/OS%20Extras/) file now updated - 39 further stations added. All known Active Stations, Passive Stations & extant or destroyed Triangulation Pillars are now included, plus sundry other points of interest as listed on T:UK (http://www.trigpointinguk.com/)

If anyone spots an omission, please let me know.



23rd July 2009, 09:17 PM
I've uploaded an updated version of the OS Extras (http://groups.yahoo.com/group/trigonomy/files/Data/OS%20Extras/) file to the Trigonomy (http://groups.yahoo.com/group/trigonomy/) group. It's a .csv sheet designed to be dropped straight into a Garmin GPSr via their POI loader, with accompanying .bmp image, but should be easily adaptable for other GPSr/applications.

Location data for extant trig pillars is readily available, either directly from websites (http://www.haroldstreet.org.uk/) or, better still, via Open Source Mapping (http://sites.google.com/site/talkytoasteruk/ukmaps). The OS Extras file aims to fill a gap by providing location data for pillars that are missing or destroyed. In addition, it contains data for all non-pillar passive stations, active stations, and sundry other objets such as curry stools, fenomarks and concrete rings. In other words, everything on T:UK (http://www.trigpointinguk.com/index.php), minus a few things that clearly shouldn't be there (such as benchmarks...), plus a good deal more that arguably should be there. Current total is 1505, made up as follows:

Active Stations 144
Bench Mark 1
Berntsen 99
Block 20
Bolt 110
Buried Block 4
Centre 2
Concrete Ring 8
Curry Stool 9
FBM 204
Fenomark 11
Ferrule 1
Gravity FBM 4
Non-OS Pillar 17
OS Pillar Extant 25
OS Pillar Missing 480
Phantom Trig 12
Platform Bolt 2
Rivet 139
Spider 6
Surface Block 206
Tidal Gauge Bolt 1

Total 1505

Any queries, or anything else that should appear, please let me know.



29th July 2009, 06:18 PM

> Concrete Ring 8

9 by my reckoning:

In the Lake District:
Knipe Moor
Seat Robert
Selside Brow (aka Branstree)
Great Yarlside

and in the Pennines:
Stonesdale Moor (aka Roberts Seat)
High Seat
Swarth Fell Pike

With maybe a few more lurking. The OS record of the buried block at Millstone Rigg
near Nine Standards Rigg looked hopeful but I couldn't find anything and the strange
looks at my excavation efforts from passers by on this popular hill didn't help :)

The buried block at Tees Head, not far from the trig on Cross Fell, is another possible -
I haven;'t checked that one yet.


29th July 2009, 08:59 PM
Thanks Ted, I'd missed Sails, now added.

Let me know how the digging goes on Tees Head!



4th August 2009, 04:20 PM
I've uploaded to Trigonomy (http://groups.yahoo.com/group/trigonomy/files/Data/Garmin%20POI%20Files/) a new POI .csv file for use with a Garmin GPSr, containing location data for all known Trig Pillars, extant or destroyed, plus FBMs, Active & Passive Stations and other notable trig marks such as Curry stools, Concrete Rings, Fenomarks, Spiders, Phantom Trigs etc.

Where pillars have been converted to Blocks, relocated or replaced by another station this should be indicated too, and the reason for a pillars's demise is given where known.

The material that previously comprised the OS Extras POI file has been incorporated here, so it has been discontinued. The current total is 7592 - if there's anything to be added please let me know.

The file has also been uploaded this POI (http://poifriend.com/) site , which purports to convert files for use with other types of GPSr. I don't have any immediate means of checking the accuracy of this procedure, owning only a Garmin GPSr, so any feedback regarding other brands would be welcome.

(23h41 - Version 1.1 uploaded...)


11th August 2009, 11:44 PM
I've uploaded a new version of this Garmin POI file (http://groups.yahoo.com/group/trigonomy/files/Data/Garmin%20POI%20Files/) to trigonomy, adding a fair bit of extra detail:

* FB numbers for all pillars that ever had one
* Vanessas identified
* access problems flagged
* reports of damage (fairly serious only)
* toppled or leaning
* reason for loss if known
* details of replacement pillars
* stonebuilt, cylindrical, other shape irregularities

Where a pillar has been shunted to the edge of a field or behind the barn or whatever, co-ords relate to the new location, not the original point, and in some such cases, there are directions to help find awkward pillars.

(Also available here (http://poifriend.com/?show=byuser&uid=47704) for other GPSr)

Any omissions or corrections to the usual address etc.


14th August 2009, 04:36 PM
Passive Station ID numbers now added to description field.


1st September 2009, 08:18 PM
Trig Points POI (http://poifriend.com/?show=byuser&uid=47704) file updated.

21st August 2011, 09:02 AM
> Let me know how the digging goes on Tees Head!

> Regards,
> Bernie

2 years later I finally got round to checking this one. Now logged as
Buried under an assortment of stones and rubbish.

So that makes 10 of these circular stations so far (5 Pennines, 5 Lake District).

The OS records imply another on Nine Standards Rigg. The grid ref puts it next to the toposcope. I checked a while ago and couldn't find it but might be worth another visit with a metal detector.


21st August 2011, 11:00 AM
Good news Ted, I'll add it to the database.

Incidently, the POIFriend site was shut down a while back, so that option is closed for now, but if anybody wants a copy of my GSAK trigs database emailed just let me know.