Showing posts with label Bowland Knotts. Show all posts
Showing posts with label Bowland Knotts. Show all posts

Saturday, 27 December 2025

Mapping Mountains – Trimble Surveys – Ward’s Stone

 

21.10.25  Bowland Knotts (SD 727 606) 

Looking toward the old summit location of Bowland Knotts

Recent trips to the moors above Burnley have given a mixture of blue sky, warmth and autumnal colours.  All trips have been dry, with not a speck of the wet stuff falling from the sky.  This scenario changed on our latest visit to John Kirk’s.  The weather forecast warned to expect fast moving showers with rain in between, and it didn’t disappoint.

John had planned our two day stay with easy ascents and numerous meals out, which seemed a good combination, and especially so as any prolonged walk would involve getting well and truly soaked.  It was a matter of getting out and trying to time our ascents for a spell between the frequent showers and hoping to remain relatively dry in the process.  However, hoping to do so is one thing and what was encountered is another. 

Not my favourite weather conditions

Our first hill of the visit was Bowland Knotts.  The summit of this hill was relocated in December 2013 when the 1st edition of the The Fours was published by Europeaklist.  This was at a time before LIDAR was being used to analyse numerical data.  This relocation was subsequently confirmed when LIDAR became available for this hill.

The summit relocation eased its ascent, if indeed that is what is wanted, and today it certainly was.  Its old listed summit is positioned beside the trig pillar and south-west from where a narrow road crests these hills.  It’s an easy ascent from here to the trig via a couple of small lumps on the way, following in the main a solid stone wall that keeps to the crest of the ridge.  However, its highest point is even closer and just eastward of the high point of the road.  A brisk walk up and down wouldn’t take more that ten minutes and that’s stopping on the summit to take the customary photographs of extended views whilst bathing in the delights of blue sky and warmth.  In all it took us 41 minutes to visit the high point and get back to the relative dryness of John’s car.  Only two of us made it this far as the third was the sensible one and remained in the car after we realised that our initial endeavours had taken us in the wrong direction, and even then we didn’t get to the high point of this section of ridge.  We thought we had reached the summit; having set out in wet and windy conditions following our confidently striding local guide, who unbeknownst to the two incomers was going in completely the wrong direction. 

Following our local guide toward the trig pillar

Navigational errors can easily be made, but you would think that three experienced hill walkers who between them have completed the Munros, English and Welsh 2,000ft’ers, and in the case of one of the incomers the Welsh ones on multiple occasions, the Deweys for two of them, the other one didn’t venture into England and just completed the Welsh ones, for one of them the Welsh Humps and between the three numerous other lists, would have enough gumption to realise that following the ridge in the direction of the trig pillar was in fact incorrect, and that the true summit was in the opposite direction on the other side of the road.  Well, they eventually did, but it took them a while to fully comprehend this. 

Heading toward what we thought was the high point of the hill

The realisation of our incorrect wander only happened when back in the car having got wet from the initial endeavours.  When the error of our ways was realised I laughed, only a bit mind, as this now meant another journey out in to the particularly inclement weather conditions.  Thankfully it was only a short distance to the summit via a small section of road, a cattle grid, a wet bit of ground and an attractive rising lump that took me and Mark to the high point.  John was sensible and remained back in the car.

I had just enough time to try and take a photo with the inconvenience of ‘memory card full’ flashing on my camera screen.  I could of course stand and fiddle about finding a new one and inserting it in the camera for a couple of quickly taken photographs, but it was wet, it was windy and although my brolly had done an excellent job of keeping me relatively dry it was also cumbersome to try and do anything else except for walking with it when it was up.  However, I did take a couple of Mark on the summit with his mobile phone. 

Mark Trengove on the summit of Bowland Knotts (SD 727 606)

I arrived back at the car feeling unusually invigorated and with a broad smile on my face.  Still wet though! 

 

Survey Result: 

 

Bowland Knotts 

Summit Height:  430.7m (LIDAR)  

Summit Grid Reference:  SD 72767 60678 (LIDAR) (summit relocation)

Col Height:  343.4m (LIDAR)

Col Grid Reference:  SD 71799 60697 (LIDAR) 

Drop:  87.3m (LIDAR)

Dominance:  20.27% (LIDAR)

 

 

For further details please consult the Trimble Survey Spreadsheet

Tuesday, 30 May 2023

Mapping Mountains – Summit Relocations – The Fours – The 400m Hills of England


Bowland Knotts (SD 727 606) 

There has been confirmation of a Summit Relocation to a hill that is listed in the The Fours – The 400m Hills of England, with the summit height, col height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Bowland Knotts (SD 727 606)

The criteria for the list that this summit relocation applies to are:

The Fours – The 400m Hills of England.  English hills at or above 400m and below 500m in height that have 30m minimum drop, accompanying the main list are three categories of sub hills; the 400m Sub-Four category, the 390m Sub-Four category and the 390m Double Sub-Four category.  The list is co-authored by Myrddyn Phillips and Aled Williams and the 2nd edition of the booklet containing this list was published by Mapping Mountains Publications on the 24th April 2018.

The Fours - The 400m Hills of England by Myrddyn Phillips and Aled Williams

The name the hill is listed by is Bowland Knotts, and it is adjoined to the Ward’s Stone group of hills, which are situated in the southern Pennines, and it is positioned with a minor road to its immediate west, the B6478 road to its south-east and the A65 road to its north-east, and has the town of Settle towards the east north-east.

When the original list that later became known as The Fours – The 400m Hills of England was first compiled, the summit position of this hill was given as SD 722 603 based on the 430m map heighted triangulation pillar that appears on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

When the 1st edition of the The Fours was published by Europeaklist in December 2013, the summit of this hill was relocated to SD 727 606 and listed with an estimated c 86 of drop, based on an estimated c 430m summit height and an estimated c 344m col height, with both heights based on interpolation of 10m contouring that appear on the Ordnance Survey 1:25,000 Explorer map.

The following note accompanied its listing:

As there is no 430m contour ring in the vicinity of the triangulation pillar that has a flush bracket height of 429.932m (highest ground in vicinity of trig is at SD 722 603) the listed summit has been relocated to the vicinity of where a c 430m contour ring is shown on the map.  Therefore the summit is relocated from the previously listed high point which appeared in the original published listing in the RHB Yahoo Group file database.  However, margin of uncertainty associated with contour lines means the ground at SD 722 603 in the vicinity of the trig is still a contender as overall high point.

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales. 

LIDAR summit image of Bowland Knotts (SD 727 606)

LIDAR analysis gives the highest ground on this hill as 430.7m positioned at SD 72767 60678, as opposed to the originally listed summit position which LIDAR gives as 430.0m positioned at SD 72207 60305, and this comes within the parameters of the Summit Relocations used within this page heading, these parameters are:

The term Summit Relocations applies to when the high point is positioned in a different field, to a different feature such as a conifer plantation, within a different map contour, a different point where a number of potential summit positions are within close proximity, when natural ground or the natural and intact summit is confirmed compared to a higher point such as a raised field boundary or covered reservoir that is considered a relatively recent man-made construct, or a relocation of approximately 100 metres or more in distance from either the position of a map spot height or from where the summit of the hill was previously thought to exist.

Therefore, the summit height produced by LIDAR analysis is 430.7m and this is positioned at SD 72767 60678.  This position is not given a spot height on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map and is approximately 570 metres north-eastward from where the original listed summit is positioned.

 

The full details for the hill are:

Group:  Ward’s Stone

Name:  Bowland Knotts

OS 1:50,000 map:  98

Summit Height:  430.7m (LIDAR)

Summit Grid Reference (New Position):  SD 72767 60678 (LIDAR)

Col Height:  343.4m (LIDAR)

Col Grid Reference:  SD 71799 60697 (LIDAR)

Drop:  87.3m (LIDAR)

 

Myrddyn Phillips and Aled Williams (May 2023)