Trœgstrad
NO19970833_AAugust 1997·Trœgstrad
Reported August 1997 at Trœgstrad. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- August 1997 (month precision)
- place
- Trœgstrad
Norway - crop
- not recorded by any source
- size
- 164 ft (50.0 m) across
as written: 50 m | 164 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
- 59.312948, 11.082097
- how it was got
- county centroid
county, to within 38,762 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 38.0 KiB image/jpeg |
image 0845b6d6a171 | https://www.cropcirclecenter.com/date/1997/199708.html |
Date
August 1997, to month precision. What a source records is the day a formation was found and reported.
- reported by
- cc: August 1997
Place
What each source printed, and the coordinate derived from it. No source in this archive publishes a coordinate of its own.
- coordinate
- 59.312948, 11.082097 — county, ±38,762 m, by county_centroid, from the cc record
- on a map
- OpenStreetMap
| site | place | county | country | grid ref | what3words | fix |
|---|---|---|---|---|---|---|
| cc | Østfold | Norway | 59.312948, 11.082097 county / county_centroid |
Crop and size
- crop
- not recorded (cc: —)
- diameter
- 164 ft (50.0 m)
- size as written
- 50 m | 164 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 | NO19970833_A |
| name | Trœgstrad |
| location | |
| county | Østfold |
| country | Norway |
| date reported | 1997-08 |
| date precision | month |
| crop | |
| size | 50 m | 164 ft |
| diameter (ft) | 164 |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1997/199708.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | unknown_day; no_formation_page |
| record | cc/3caf60b055b74… raw record view: /formation/cc/3caf60b055b74beea3fc8d5adbbfa7da12f62111ada3b80cd0c717c608d4754c 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 0845b6d6 | ≈ 2-fold score 0.883 | 7 | 1 | 0.973 | 0.1125 |
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 0845b6d6— 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
- Marlborough 31 July 1997, Marlborough
- next
- Berkhamstead 2 August 1997, Berkhamstead
- previous in NO
- Amodt 17 July 1997
- next in NO
- Lœten 6 August 1997
- same day
- Lindau (Lindau) · Dodworth (Dodworth) · Dodworth (Dodworth) · Fosbury Fort (Fosbury Fort) · Liddington Castle (Liddington Castle) · Liddington Castle (Liddington Castle) · Milk Hill (Milk Hill) · Cley Hill (Cley Hill) · Marlborough (Marlborough) · Milk Hill (Milk Hill) · Hackpen Hill (Hackpen Hill) · Etchilhampton (Etchilhampton) · Liddington Castle (Liddington Castle) · Etchilhampton (Etchilhampton) · Clanfield (Clanfield) · Liddington Castle (Liddington Castle)
- 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.
this formation has no coordinate at place confidence or better, so nothing can be called near it
- 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/NO19970833_A.json · row in index/manifest.jsonl
- input digests
- entity 28151cdaeaa7 · images 8273802f3951 · texts 4f53cda18c2b · geo ac58b5b1f359