Possible Triangulation Stations Layer?


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By Lancashire Lad on 29/05/17 at 3:05pm

Hi Paul,

I've recently been doing a bit of research relating to OS Trig points, and was wondering whether you might consider providing a "Triangulation Stations Layer", similar to your Benchmarks Layer, (which I've found useful), for use with the WalkLakes Mapping?

I'm assuming that you will have used the OS Benchmarks Archive as the database for your benchmarks layer? That information being downloadable from this OS webpage, as a zipped CSV file: - https://www.ordnancesurvey.co.uk/benchmarks/

The Triangulation Stations archive, is likewise downloadable as a zipped CSV file, from this OS webpage: - https://www.ordnancesurvey.co.uk/gps/le ... n-stations

In case it's of any general interest to anyone reading this - the two zipped CSV files mentioned above, once downloaded, can easily be opened and saved as MS Excel Spreadsheets to be retained for future reference.

Best regards, Mike.


By TallPaul on 29/05/17 at 4:29pm

If I remember rightly that's the dataset we use to place the trig points on the WayMaps tiles (which is how we also have survey blocks, like the one on Blencathra). For Ireland we used a similar dataset from another source.

So they're already there, permanently, on WayMaps and of course the Ordnance Survey tiles show trig points.

So I'm not sure what a separate layer would give us?

Unless we added trip point bagging to the software but I think we discussed that previously and decided not to add it in the end as it's a bit too specialist (and it's already been done, both in the UK and Ireland).


By Lancashire Lad on 29/05/17 at 7:00pm

Hi Paul,

I'm definitely not into trig point bagging, and wouldn't specifically go out of my way to visit one, but out of general interest, I do like to see such things as bench marks, triangulation stations, survey blocks, etc. etc., when I know they happen to exist at some location I'm already visiting.

With respect to a possible "Triangulation Stations Layer", I was thinking along the lines that such a facility might be able to provide a similar level of information (for each station - assuming "auto-generated text" from the database), as is given when one clicks on a particular benchmark on the WalkLakes benchmarks layer.

I appreciate that triangulation pillars are shown on OS Maps/tiles, and that trig pillars & survey blocks etc. are shown on the Waymaps tiles. (But there's no way to differentiate between the types).

E.g. I was at the summit of Robinson recently, and happened to spot the metal button on the "block type" ground level triangulation station at the summit shelter location: -

Robinson Summit Triangulation Station "Block".

(Until I spotted that "button", I wasn't aware that a triangulation station actually existed at Robinson's summit).

On Ordnance Survey Maps/tiles, (certainly at 1:25000 and 1:50000 scales), that triangulation station isn't shown, as it isn't a trig "pillar". On the WalkLakes Waymaps tiles, a brown triangle symbol is shown at Robinson's summit, but from that symbol alone, one cannot determine whether it is meant to signify a Wainwright summit, a trig pillar, or another type of triangulation station. I think it is safe to say that those coloured symbols represent Wainwright summits. As in general, (according to the OS triangulation stations archive database), there aren't any triangulation stations of any type at most of those locations.

So, effectively, it is primarily trig. pillars, (with some selected additions such as the survey block on Blencathra), that are currently shown on the maps. They represent less than a quarter of the actual triangulation stations shown on the OS database. There are numerous other types of triangulation station, such as Keswick church spire! (along with an assortment of chimneys, weather vanes, lighthouses, war memorials, etc. etc. etc. - The variety of such stations seems to be quite diverse!). I thought that a separate layer showing them all, giving a quick visual indication of their locations, would perhaps be of similar general interest to WalkLakes supporters as the benchmarks layer?

I do find such things fascinating. Knowing about them/seeing them always adds that little bit of extra interest at any given location. ;)

Anyway, (Sorry about my long-winded ramblings!). - I rest my case M'lud. :lol:

Best regards, Mike.

PS: I hope that you've still got the release of "zoom level 9" (with respect to WalkLakes Waymaps as an alternative to OS maps on the GPS mapping tab when logged in) on your ever expanding "to-do" list. :o
Definitley looking forward to seeing that. :D
I do like the WalkLakes Waymaps, and given the availability of zoom level 9, would use them in preference to OS mapping when taking screenshots of maps for my personal walks records.


By TallPaul on 06/06/17 at 1:22pm

Apologies for the delay in replying. I've been a bit distracted (see below).

I'm definitely not into trig point bagging, and wouldn't specifically go out of my way to visit one, but out of general interest, I do like to see such things as bench marks, triangulation stations, survey blocks, etc. etc., when I know they happen to exist at some location I'm already visiting.

With respect to a possible "Triangulation Stations Layer", I was thinking along the lines that such a facility might be able to provide a similar level of information (for each station - assuming "auto-generated text" from the database), as is given when one clicks on a particular benchmark on the WalkLakes benchmarks layer.

I appreciate that triangulation pillars are shown on OS Maps/tiles, and that trig pillars & survey blocks etc. are shown on the Waymaps tiles. (But there's no way to differentiate between the types).

So, effectively, it is primarily trig. pillars, (with some selected additions such as the survey block on Blencathra), that are currently shown on the maps. They represent less than a quarter of the actual triangulation stations shown on the OS database. There are numerous other types of triangulation station, such as Keswick church spire! (along with an assortment of chimneys, weather vanes, lighthouses, war memorials, etc. etc. etc. - The variety of such stations seems to be quite diverse!). I thought that a separate layer showing them all, giving a quick visual indication of their locations, would perhaps be of similar general interest to WalkLakes supporters as the benchmarks layer?

I agree, seems like a good idea.

PS: I hope that you've still got the release of "zoom level 9" (with respect to WalkLakes Waymaps as an alternative to OS maps on the GPS mapping tab when logged in) on your ever expanding "to-do" list. :o
Definitley looking forward to seeing that. :D
I do like the WalkLakes Waymaps, and given the availability of zoom level 9, would use them in preference to OS mapping when taking screenshots of maps for my personal walks records.

And that's the thing I've been working on. If you are logged in then there's a new option in the menu to let you select where you are getting your tiles from (for zoom levels 7 and higher). Enjoy.


By Lancashire Lad on 06/06/17 at 2:55pm

Hi Paul,

Thanks for your reply. - Sounds like a triangulation stations layer might yet be a possibility.

Just had a quick play with the new OS/Waymaps tiles options for zoom levels 7 and above. - Great!!!!

I really like the fact that the Waymaps maps show paths only, and aren't cluttered up with rights of way - (which from my experience of map usage are a hindrance, as they hardly ever seem to tally with physical paths on the ground).

In a utopian world, I'd still like to be able to make the path "dotted lines" a tad bolder, (or maybe a different colour), as even at zoom level 9 they don't (to me) stand out particularly well from the background mapping detail. A sign of age, I think. - My eyes aren't quite what they used to be! :oops:
(The hashed green rights of way lines, as shown on the OS mapping, stand out supremely well. - If only they actually related to paths on the ground!).

However, if a facility for "altering" the boldness/colour of the path lines on the WayMaps isn't a remote possibility, I still think this new addition gives a much cleaner look to the maps. It will be of much use to me, and no doubt, many others.

This site just keeps going from strength to strength! ;)

Best regards, Mike.


By TallPaul on 13/06/17 at 3:10pm

However, if a facility for "altering" the boldness/colour of the path lines on the WayMaps isn't a remote possibility, I still think this new addition gives a much cleaner look to the maps. It will be of much use to me, and no doubt, many others.

We can't let you actively alter the boldness/colour of path lines on WayMaps as the paths are part of the tiles which we build with each new release.

However we are thinking about how we render paths, not least because some recent work by people at OpenStreetMap mean that in the future a lot more paths in England and Wales will be marked up with their Rights of Way designation (think green rather than black in OS terms). We may want to indicate that by some means in the rendering of paths in future.

All of this is some way off however.



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