Silbury Hill

Images

3 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 (2)

diagram cropcirclecenter.com / Bertold Zugelder site default diagram cropcirclecenter.com / Bertold Zugelder site default

Photographs (1)

aerial Frank Laumen image credit

Date

28 July 2018, to day precision. What a source records is the day a formation was found and reported.

reported by

cc: 28 July 2018

weekday

Saturday, day 209 of the year, ISO week 30, summer

sun and moon

37.1 days after the June solstice; moon full (100% lit), 0.7 days after 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

51.415755, -1.857405 — place, ±2,000 m, by os_open_names, from the cc record

on a map

OpenStreetMap

Crop and size

crop

wheat (cc: wheat)

diameter

not recorded by any source

size as written

not recorded

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

2 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 af98506c— 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

Wyke Lane 27 July 2018, Wyke Lane

next

Hackpen Hill 29 July 2018, Hackpen Hill

previous in UK

Wyke Lane 27 July 2018

next in UK

Hackpen Hill 29 July 2018

same day

no other formation is dated this day

within 7 days and 25 km

Clifford's Hill 21 July 2018, 6.0 km away, 7 day(s) apart · Hackpen Hill 29 July 2018, 6.9 km away, 1 day(s) apart

In place

The nearest formations the archive can place.

Silbury Hill15 July 1988
Silbury Hill
0 m away, 1988-07-15 Silbury Hill26 July 1988
Silbury Hill
0 m away, 1988-07-26 Silbury Hill30 July 1988
Silbury Hill
0 m away, 1988-07-30 Silbury Hill10 May 1989
Silbury Hill
0 m away, 1989-05-10 Silbury Hill23 June 1989
Silbury Hill
0 m away, 1989-06-23 Silbury Hill28 June 1989
Silbury Hill
0 m away, 1989-06-28

same county and year

Willoughby Hedge 8 May 2018 · Bishop's Cannings Down 3 June 2018 · Hackpen HIll 9 June 2018 · Keysley Down 10 June 2018 · Winterbourne Stoke 17 June 2018 · Devil's Den 20 June 2018 · Broad Hinton 23 June 2018 · Yarnbury Castle 24 June 2018 · Waden Hill 2 July 2018 · Woodborough 2 July 2018 · Aylesbury 6 July 2018 · Martinsell Hill 6 July 2018 · Coneybury Hill 8 July 2018 · Winterbourne Bassett 14 July 2018 · Waden Hill 15 July 2018 · Waden Hill 20 July 2018 · Clifford's Hill 21 July 2018 · Gurston Ashes 23 July 2018 · Hackpen Hill 29 July 2018 · Etchilhampton 10 August 2018 and 2 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/UK20180728_A.json · row in index/manifest.jsonl

input digests

entity 7276af93d535 · images 2aa53c41597b · texts 4f53cda18c2b · geo a4bd36e7f5aa