Reconstruction of the
2021 Spiers Lane formation |
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1. |
| Draw a circle. Draw the horizontal and vertical centerlines.
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2. |
| Construct the inscribed regular 16-sided polygon of circle 1, pointing up.
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3. |
| Draw the sixteen rays of polygon 2, from the center to the angular points. Number these rays (and angular points) 1 - 16, clockwise, starting at the top.
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4. |
| Draw the diagonal of polygon 2 between angular points nrs. 1 and 7.
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5. |
| Draw the diagonal of polygon 2 between angular points nrs. 16 and 6.
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6. |
| Construct a circle concentric to circle 1, passing through the intersection of diagonals 4 and 5.
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7. |
| Draw the connecting line between the intersections of circle 6 with rays 3 nrs. 1 and 13.
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8. |
| Construct a circle concentric to circle 1, tangent to line 7.
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9. |
| Construct a circle concentric to circle 1, passing through the intersections of line 7 with rays 3 nrs. 14 and 16.
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10. |
| Construct the circumscribed square of circle 6, with one angular point on ray 3 nr. 3.
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11. |
| Construct the circumscribed circle of square 10.
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12. |
| Draw two connecting lines, between angular points nrs. 1 and 3, and 2 and 4.
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13. |
| Construct a "two-points" circle (defined by the two end-points of a centerline) between the intersections of rays 3 nrs. 2 and 3 with lines 12, as shown.
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14. |
| Copy circle 13 to the righthand intersection of circle 6 and the horizontal centerline.
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15. |
| Copy circle 13 to the righthand intersection of circle 14 and the horizontal centerline.
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16. |
| Construct a circle concentric to circle 1, tangent to circle 15 at the righthand side.
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17. |
| Copy circle 13 four times, to the intersections of circle 16 and the horizontal and vertical centerlines.
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18. |
| Construct a circle centered at the lower intersection of circles 6 and 14, tangent to circle 15 at the near side.
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19. |
| Copy circle 18 to the center of circle 15.
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20. |
| Construct a circle concentric to circle 1, tangent to circle 19 at the lefthand side.
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21. |
| Copy circle 18 four times, to the intersections of circle 16 with rays 3 nrs. 3, 7, 11, and 15.
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22. |
| Draw the connecting line between the intersections of circle 8 with rays 3 nrs. 1 and 10.
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23. |
| Construct a circle concentric to circle 1, tangent to line 22.
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24. |
| Construct a circle centered at the intersection of circle 8 and ray 3 nr. 12, tangent to circle 9 at the near side.
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25. |
| Copy circle 24 four times, to the center of circle 1, and to the intersections of circle 8 with rays 3 nrs. 4, 6, and 14.
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26. |
| Draw four lines, two parallel to rays 3 nrs. 4 and 14, tangent to circles 25 at the lower sides, and two parallel to rays 3 nrs. 6 and 12, tangent to circles 24 and 25 at the upper sides. See detail.
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27. |
| Construct a circle centered at the lower intersection of circle 23 and the vertical centerline, tangent to the central circle 25 at the lower side.
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28. |
| Copy circle 27 to the righthand intersection of circle 1 and the horizontal centerline.
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29. |
| Construct a circle concentric to circle 1, tangent to circle 28 at the lefthand side.
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30. |
| Construct a "two-points" circle between the lower intersections of circles 23 and 27 with the vertical centerline.
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31. |
| Copy circle 30 seventeen times, to the center of circle 1, and to the intersections of circle 11 and rays 3.
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32. |
| Draw sixteen pairs of parallel lines, parallel to rays 3, tangent at both sides to the central circle 31 and the other circles 31, as shown.
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33. |
| Draw the connecting line between the righthand intersections of circles 6 and 20 with the horizontal centerline, and divide this line into five equal parts.
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34. |
| Construct four circles concentric to circle 1, passing through dividing nodes 33. See detail.
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35. |
| Remove all redundant parts from lines 3, and 26, and from circles 8, 9, and 23, such that the shown patterns remain.
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36. |
| Remove all redundant parts from circles 6, 20, and 34, and from lines 32, such that the shown patterns remain.
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37. |
| Circles 1, 11, 16, 17, 21, and 29, and patterns 35, and 36, are used for the final reconstruction.
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38. |
| Remove all parts not visible within the formation itself.
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39. |
| Colour all areas corresponding to standing...
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40. |
| ...or to flattened crop, and finish the reconstruction of the 2021 Spiers Lane formation.
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41. |
| The final result, matched with two aerial images.
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