Plumridge Hill
UK19990505_A5 May 1999·Plumridge Hill, Hertfordshire·oilseed rape
Reported 5 May 1999 in oilseed rape at Plumridge Hill, Hertfordshire. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 5 May 1999 (day precision)
- place
- Plumridge Hill
Hertfordshire
England - crop
- oilseed rape
- size
- 59 ft (18.0 m) across
as written: 18 m | 59 ft - recorded by
- cc
- images
- 1 · 1 diagram
- writing
- nothing was written about this formation on any source
Also called
Nothing else. No other name or place string appears on any source record for this formation.
Where exactly
- coordinate
- 51.683427, -0.158040
- how it was got
- os open names
place, to within 2,000 m, from the cc record - on a map
- OpenStreetMap
No source publishes a coordinate for any formation in this archive. Every coordinate here is derived from the place name a source printed, and this page says how precise that makes it rather than rounding it away.
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)
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| cc | diagram no diagram published by cropcirclecenter (plain circle placeholder) |
cropcirclecenter.com / Bertold Zugelder | site default | 575×415 32.4 KiB image/jpeg |
image c782665e5c68 | https://www.cropcirclecenter.com/date/1999/199905.html |
Date
5 May 1999, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 5 May 1999
- weekday
- Wednesday, day 125 of the year, ISO week 18, spring
- sun and moon
- 45.4 days after the March equinox; moon waning gibbous (80% lit), 4.9 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
- 51.683427, -0.158040 — place, ±2,000 m, by os_open_names, from the cc record
- on a map
- OpenStreetMap
| site | place | county | country | grid ref | what3words | fix |
|---|---|---|---|---|---|---|
| cc | Hertfordshire | England | 51.683427, -0.158040 place / os_open_names |
Crop and size
- crop
- oilseed rape (cc: oilseed rape)
- diameter
- 59 ft (18.0 m)
- size as written
- 18 m | 59 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.
| field | cc cropcirclecenter.com |
|---|---|
| id / slug | UK19990505_A |
| name | Plumridge Hill |
| location | |
| county | Hertfordshire |
| country | England |
| date reported | 1999-05-05 |
| date precision | day |
| crop | oilseed rape |
| size | 18 m | 59 ft |
| diameter (ft) | 59 |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1999/199905.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | no_formation_page |
| record | cc/7aa92681ec7e8… raw record view: /formation/cc/7aa92681ec7e87b7e820b66f80263f76b7329134865ea75c36320b19ab123975 in the preview app |
Texts
no text documents in the archive for this formation
Claims about this formation
no claim was extracted from a text about this formation
Geometry
1 diagram file(s) on this page, of which 1 is a shared cropcirclecenter placeholder rather than a drawing of this formation. 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.
| diagram | rotational symmetry | elements | rings | mirror | fill |
|---|---|---|---|---|---|
| cc c782665e (placeholder: digest) | ≈ continuous (concentric circles) | 1 | 1 | 0.996 | 1.0049 |
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 c782665e— 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
- Milk Hill (2) 3 May 1999, Milk Hill (2)
- next
- Tormarton 9 May 1999, Tormarton
- previous in UK
- Milk Hill (2) 3 May 1999
- next in UK
- Tormarton 9 May 1999
- same day
- no other formation is dated this day
- within 7 days and 25 km
- none, or this formation has no coordinate at place confidence or better
In place
The nearest formations the archive can place.
Potters Bar27 June 1993Potters Bar
2.8 km away, 1993-06-27
Potters BarJuly 1993Potters Bar
2.8 km away, 1993-07 Cuffley25 July 1989
Cuffley
4.1 km away, 1989-07-25
Cuffley18 June 2000Cuffley
4.1 km away, 2000-06-18 Sewardstone1975
Sewardstone
11.0 km away, 1975 SewardstoneJanuary 1979
Sewardstone
11.0 km away, 1979-01
- same county and year
- none
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/UK19990505_A.json · row in index/manifest.jsonl
- input digests
- entity 479ea07b0e65 · images afe2570b1c43 · texts 4f53cda18c2b · geo 0aeb2da8c3ac