Hoofddorp
NL19901333_A1990·Hoofddorp
Reported 1990 at Hoofddorp. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 1990 (year precision)
- place
- Hoofddorp
Italy - 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
- 52.302500, 4.688890
- how it was got
- geonames
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 39.1 KiB image/jpeg |
image 0b477b2bdae0 | https://www.cropcirclecenter.com/date/1990/1990unk.html |
Date
1990, to year precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 1990
Place
What each source printed, and the coordinate derived from it. No source in this archive publishes a coordinate of its own.
- coordinate
- 52.302500, 4.688890 — place, ±2,000 m, by geonames, from the cc record
- on a map
- OpenStreetMap
| site | place | county | country | grid ref | what3words | fix |
|---|---|---|---|---|---|---|
| cc | Noord-Holland | Italy | 52.302500, 4.688890 place / geonames |
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 | NL19901333_A |
| name | Hoofddorp |
| location | |
| county | Noord-Holland |
| country | Italy |
| date reported | 1990 |
| date precision | year |
| crop | |
| size | |
| diameter (ft) | |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1990/1990unk.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | unknown_month; no_formation_page |
| record | cc/30b3089918f6e… raw record view: /formation/cc/30b3089918f6e36ee4d791cb494745c11301e9c610aca302528551c226899460 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 0b477b2b | ≈ none found | 6 | 1 | 0.974 | 0.5216 |
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 0b477b2b— 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
- AU19891206_A 6 December 1989
- next
- Merefa 7 January 1990, Merefa
- previous in NL
- Usselo 1986
- next in NL
- Haarlemmermeer August 1990
- same day
- AF19901333_A · Karoonda (Karoonda) · CA19901333_A · EG19901333_A · Grosetto (Grosetto) · IT19901333_B · SE19901333_A · Aberystwyth (Aberystwyth) · Amport (Amport) · Arreton (Arreton) · Beckhampton (Beckhampton) · Beddingham (Beddingham) · Beddingham (Beddingham) · Bishops Waltham (Bishops Waltham) · Chorley (Chorley) · Crawley (Crawley) · Devil's Dyke (Devil's Dyke) · Duns (Duns) · Fyfield (Fyfield) · Harefiedl (Harefiedl) · Holderness (Holderness) · Hotham (Hotham) · Lowton (Lowton) · Market Rasen (Market Rasen) · Swindon (Swindon) · UK19901333_S (Warwickshire) · Wandlebury (Wandlebury) · West Blatchington (West Blatchington) · Wick Street (Wick Street) · Wimblebury (Wimblebury) · Belgrade (Belgrade) · Naples (Naples) · Oskaloosa (Oskaloosa) · US19901333_D
- 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.
Aalsmeer
6.8 km away, 1994
Schiphol31 July 1997Schiphol
7.0 km away, 1997-07-31
Schiphol16 May 2008Schiphol
7.0 km away, 2008-05-16
Leimuiden27 July 1997Leimuiden
8.8 km away, 1997-07-27 Lisserbroek7 August 1996
Lisserbroek
9.4 km away, 1996-08-07 Amsterdam18 January 1997
Amsterdam
15.8 km away, 1997-01-18
- 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/NL19901333_A.json · row in index/manifest.jsonl
- input digests
- entity bed40eacf94d · images 7f8d62fac953 · texts 4f53cda18c2b · geo b57e12cb17de