Reconstruction of the
2021 Barton Stacey Belt formation |
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1. |
| Draw a circle. Draw the horizontal and vertical centerlines.
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2. |
| Copy circle 1 two times, to its righthand intersection with the horizontal, and its upper intersection with the vertical centerline.
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3. |
| Draw the connecting line between the two intersections of circles 2.
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4. |
| Construct the inscribed dodecagon (regular 12-sided polygon) of circle 1, with one angular point on line 3.
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5. |
| Construct the inscribed circle of dodecagon 4.
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6. |
| Construct the inscribed equilateral triangle of circle 5, pointing up.
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7. |
| Construct the inscribed square of circle 5, pointing up.
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8. |
| Construct the inscribed square of circle 5, with one angular point coincident with the lower righthand angular point of triangle 6.
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9. |
| Construct the inscribed square of circle 5, with one angular point coincident with the lower lefthand angular point of triangle 6.
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10. |
| Construct the inscribed circle of triangle 6.
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11. |
| Construct a circle, tangent to both righthand sides of square 7 at the inner sides, and tangent to the righthand sides of squares 8 and 9 at the outer sides, as shown.
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12. |
| Copy circle 11 to the upper intersection of circle 1 and the vertical centerline.
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13. |
| Construct a circle concentric to circle 1, tangent to circle 12 at the lower side.
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14. |
| Construct the inscribed equilateral triangle of circle 13, pointing up.
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15. |
| Construct the inscribed circle of triangle 14.
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16. |
| Copy circle 11 to the center of circle 1.
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17. |
| Copy circle 11 four times, to the intersections of circle 15 with the horizontal and vertical centerlines.
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18. |
| Construct a circle, tangent to the righthand and lower sides of triangle 6, and tangent to circle 15 at the lower righthand side.
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19. |
| Construct the inscribed square of circle 15, with one angular point on line 3.
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20. |
| Copy circle 18 four times, to the angular points of square 19.
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21. |
| Circles 1, 10, 15, 16, 17, and 20, and squares 7, 8, and 9, are used for the final reconstruction.
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22. |
| Remove all parts not visible within the formation itself.
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23. |
| Colour all areas corresponding to standing...
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24. |
| ...or to flattened crop, and finish the reconstruction of the 2021 Barton Stacey Belt formation.
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25. |
| The final result, matched with the aerial image.
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