Triangulation Points

I like collecting things. Triangulation points are a favourite along with benchmarks that can be found along a walk or near to one.

There is something very satisfying about reaching a trig pillar, partly I guess because they invariably involve a walk up hill and a reward of sweeping views, weather permitting. There are 84 pillars within the Peak District National Park boundary and many more triangulation points and thousands more benchmarks.

Some are not shown on maps with the traditional blue triangle, the one at Hey Edge for instance, built but never used for triangulation, but was used for levelling, so does it not qualify for the blue triangle.

Some triangulation points are not even pillars. One of my walks takes in the Hunting Tower on the Chatsworth Estate, the triangulation point being the flagstaff. Another is the centre of the spire of All Saints Church in Bakewell.

With the advent of GPS the triangulation pillar network became largely redundant, but a few still do have a purpose. The pillar at Harland South, levelling bracket number 2998 is part of the Global Positioning Network and as such is protected by Ordnance Survey. A plate informs the visitor that any damage should be reported to the phone number.

Triangulation points always come in a minimum of three so a favoured walk of mine takes in the Hunting Tower at Chatsworth, the pillar at Birchen Edge along with the Three Ships and the pillar at Harland South, passing Hobs House, one of the first ancient monuments to have legal protection in the UK, on the way. Two pillars, one part of the Global Positioning System and one flagstaff on a hunting tower. Not bad for a day out.

Triangulation Pillars

P1030482_1024
SK 0239 8794 Lantern Pike S 2779 359m

Last year I started to collect all the Ordnance Survey triangulation points in the Peak District National Park boundary. I am about half way through now, although it was supposed to be finished within the year, but the days ran away with me.

There are 94 points if memory serves me correctly. The points are buildings, surface blocks, pins and the king of all tick list features, triangulation pillars.

I try to do a walk that includes 3 points, hence triangulation, its a bit of OCD within me that likes uniformity, it wouldn’t seem right doing four points.

Doing the research is fun, I didn’t know actual buildings could be points, but it makes sense. Bakewell church and the Hunting Tower at Chatsworth are two good examples. High with good lines of sight. I looked a bit weird in the Church with my GPS outstretched moving around one pace at a time, looking at my hand then looking up at the spire, and this was inside too.

Finding a surface block in thick undergrowth is very satisfying as is navigating to a pin. Some I have had to go back to as time has caught up with me before I have found them.

The best feeling is reaching a triangulation pillar. It generally involves an uphill slog, sometimes via a circuitous route, often with the pillar staying out of sight until the last few hundred meters. I think the hard work getting there is part of the joy I feel once I am at the spot. Then there is the view and searching for the, at least, other two that should be able to be seen in the distance.

Some of the pillars are a bright white, some have the lovely mottled concrete surface. Some have been adorned with plaques, some have graffiti. There are some that have been obliterated all together and some that lay forlorn away from their original site. Some hide in hedges, all pristine as the day they were made.

A summers day in a field, sat by a trig pillar that nestles in a hedgerow, eating my sandwiches while birds twitter on and the view looks all sky blue and green grass is one of the happiest ways to spend a few hours.

P1030517_1024
Noton Barn SK 2166 6616 S4183 208m