Polperro
UK19891333_I1989·Polperro, Cornwall
Reported 1989 at Polperro, Cornwall. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 1989 (year precision)
- place
- Polperro
Cornwall
England - crop
- not recorded by any source
- size
- not recorded
- 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
- 50.331513, -4.519473
- 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 | cropcirclecenter.com / Bertold Zugelder | site default | 575×415 34.6 KiB image/jpeg |
image 2b9633321fb1 | https://www.cropcirclecenter.com/date/1989/1989unk.html |
Date
1989, to year precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 1989
Place
What each source printed, and the coordinate derived from it. No source in this archive publishes a coordinate of its own.
- coordinate
- 50.331513, -4.519473 — 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 | Cornwall | England | 50.331513, -4.519473 place / os_open_names |
Crop and size
crop and size not recorded by any source
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 | UK19891333_I |
| name | Polperro |
| location | |
| county | Cornwall |
| country | England |
| date reported | 1989 |
| date precision | year |
| crop | |
| size | |
| diameter (ft) | |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1989/1989unk.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | unknown_month; no_formation_page |
| record | cc/1379eca996e61… raw record view: /formation/cc/1379eca996e61b4177dd6755742f497fa076ef84865659861a4b8226cba3bf12 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. 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 2b963332 | ≈ 4-fold score 0.986 | 5 | 1 | 1.0 | 0.1332 |
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 2b963332— 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
- Spalding 27 September 1988, Spalding
- next
- West Auckland February 1989, West Auckland
- previous in UK
- Fornham All Saints 11 September 1988
- next in UK
- Gladestry April 1989
- same day
- Argyle (Argyle) · St Gregoire (St Gregoire) · Several (Several) · Several (Several) · IT19891333_C · Bidford-On-Avon (Bidford-On-Avon) · Bishopstone (Bishopstone) · Bratton (Bratton) · Charity Down (Charity Down) · Great Glen (Great Glen) · Kelston (Kelston) · Lewes (Lewes) · Melcombe Bingham (Melcombe Bingham) · Stanton (Stanton) · UK19891333_K · UK19891333_L · Warminster (Warminster) · West Overton (West Overton) · Woolstone (Woolstone) · Easterton (Easterton) · Denrock (Denrock) · US19891333_B
- 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.
location unknownMay 2021location unknown
6.1 km away, 2021-05
St Austell28 June 1996St Austell
19.3 km away, 1996-06-28
St Austell4 July 1996St Austell
19.3 km away, 1996-07-04
Mevagissey23 June 2023Mevagissey
20.4 km away, 2023-06-23
Hatt15 July 1994Hatt
21.7 km away, 1994-07-15 Viverdon Down15 July 1992
Viverdon Down
23.2 km away, 1992-07-15
- same county and year
- UK19890733_E July 1989
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/UK19891333_I.json · row in index/manifest.jsonl
- input digests
- entity 940f4ac6a206 · images cf9ce8f1315f · texts 4f53cda18c2b · geo 6aa038bae39c