Hackpen Hill

Images

1 image(s) on this formation's own source records. Click a tile for the full image; the bytes are fetched when you ask for them and are not stored in this page.

Diagrams (1)

diagram cropcirclecenter.com / Bertold Zugelder site default

Date

27 May 2001, to day precision. What a source records is the day a formation was found and reported.

reported by

cc: 27 May 2001

weekday

Sunday, day 147 of the year, ISO week 21, spring

sun and moon

24.8 days before the June solstice; moon waxing crescent (23% lit), 9.6 days before the full moon (computed at 12:00 UTC; a reported date is a discovery date, not a creation date)

Place

What each source printed, and the coordinate derived from it. No source in this archive publishes a coordinate of its own.

coordinate

51.468306, -1.815723 — place, ±2,000 m, by os_open_names, from the cc record

on a map

OpenStreetMap

Crop and size

crop

barley (cc: barley)

diameter

203 ft (61.9 m)

size as written

62 m | 203 ft

Source records

What each source published, side by side. A row whose values differ across the sources is marked: the archive prints the disagreement rather than choosing a winner.

Geometry

1 diagram file(s) on this page. measured from the diagram itself, and experimental: the extractor's rotational order is right on 88.8 % of a 200-diagram hand-labelled set against a gate of 90 %, so read a number here beside the picture rather than instead of it.

Experimental, and marked ≈ wherever it appears. These numbers are read off a drawing, not off the field: the extractor's rotational order agrees with a hand-labelled set on 88.8 per cent of 200 diagrams against a gate of 90 per cent, its element count is within one on 97.5 per cent, and its ring count is not calibrated at all. Nothing in the analysis tree is derived from the rotational order while that gate is unmet.

Diagrams that look like these: cc c1150d4d— the nearest by perceptual hash. The whole archive is browsable by shape in the shape section, and this formation's own diagrams go straight into that grid: show them in the grid.

Neighbours

In time

previous

Pewsey White Horse 25 May 2001, Pewsey White Horse

next

Pegsdon 28 May 2001, Pegsdon

previous in UK

Pewsey White Horse 25 May 2001

next in UK

Pegsdon 28 May 2001

same day

no other formation is dated this day

within 7 days and 25 km

Avebury Stone Avenue 31 May 2001, 5.2 km away, 4 day(s) apart · Avebury Stone Avenue 31 May 2001, 5.2 km away, 4 day(s) apart · Honeystreet 30 May 2001, 13.1 km away, 3 day(s) apart · Honeystreet 30 May 2001, 13.1 km away, 3 day(s) apart · Pewsey White Horse 25 May 2001, 14.8 km away, 2 day(s) apart

In place

The nearest formations the archive can place.

Hackpen Hill4 July 1991
Hackpen Hill
0 m away, 1991-07-04 Hackpen HIll12 July 1991
Hackpen HIll
0 m away, 1991-07-12 Hackpen Hill9 June 1994
Hackpen Hill
0 m away, 1994-06-09 Hackpen HillAugust 1994
Hackpen Hill
0 m away, 1994-08 Hackpen Hill11 June 1997
Hackpen Hill
0 m away, 1997-06-11 Hackpen Hill18 August 1997
Hackpen Hill
0 m away, 1997-08-18

same county and year

Pewsey White Horse 25 May 2001 · Honeystreet 30 May 2001 · Honeystreet 30 May 2001 · Avebury Stone Avenue 31 May 2001 · Avebury Stone Avenue 31 May 2001 · Berwick Bassett 9 June 2001 · Silbury Hill 13 June 2001 · Badbury Castle 17 June 2001 · Avebury 20 June 2001 · East Kennett 20 June 2001 · Alton Barnes 21 June 2001 · Beckhampton 22 June 2001 · Liddington Castle 24 June 2001 · West Kennett 24 June 2001 · All Cannings 30 June 2001 · Beckhampton 30 June 2001 · Waden Hill 5 July 2001 · Milk Hill 12 July 2001 · Windmill Hill 15 July 2001 · Hilmarton 22 July 2001 and 46 more

Provenance

entity built at

2026-09-11T19:20:39Z (derived from the link decisions, not from this build)

index run ids

none

reviews applied

none

open queue pairs

none

entity record

index/formations/UK20010527_A.json · row in index/manifest.jsonl

input digests

entity b072152f2931 · images 796383997e91 · texts 4f53cda18c2b · geo 381dde422fd5