2014 Tetbury Lane formation
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Reconstruction of the 2014 Tetbury Lane formation | ||
| 1. |
| Draw a circle. Draw and extend the horizontal and vertical centerlines. |
| 2. |
| Draw the righthand ray of circle 1, from its center to its righthand intersection with the horizontal centerline. Divide this line into five equal parts. |
| 3. |
| Construct four circles concentric to circle 1, passing through division nodes 2. |
| 4. |
| Construct the five inscribed equilateral triangles of circles 1 and 3, all pointing up. Number the triangles 1 - 5 from inside outwards. |
| 5. |
| Construct the inscribed equilateral triangle of innermost circle 3, pointing down. |
| 6. |
| Draw the connecting line between the righthand angular points of triangle 4 nr. 1 and triangle 5. |
| 7. |
| Construct a circle centered at the intersection of line 6 and the horizontal centerline, tangent to innermost circle 3 at the righthand side. |
| 8. |
| Copy circle 7 four times, to the tops of triangles 4 nrs. 1 - 4. |
| 9. |
| Construct four circles concentric to circle 1, tangent to circles 8 at the upper sides. Number these circles 1 - 4 from inside outwards. |
| 10. |
| Construct the circumscribed equilateral triangle of circle 9 nr. 2, pointing up. |
| 11. |
| Copy circle 7 two times, to the mid-points of the lower sides of triangles 4 nrs. 3 and 5. |
| 12. |
| Construct two circles concentric to circle 1, tangent to circles 11 at the lower sides. |
| 13. |
| Construct the two circumscribed equilateral triangles of circles 12, pointing up. |
| 14. |
| Construct a "two-points" circle (defined by the two end-points of a centerline) between the center of circle 7 and its righthand intersection with the horizontal centerline. |
| 15. |
| Construct a "two-points" circle between the center of circle 14 and its righthand intersection with the horizontal centerline. |
| 16. |
| Copy circle 15 four times, to the center of circle 1, and to the angular points of outermost triangle 13. |
| 17. |
| Construct three pairs of parallel lines, tangent to central circle 16, and two by two tangent to the other circles 16, all at both sides, as shown. See detail. |
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| 18. |
| Copy circle 7 to the top of outermost triangle 13. See detail. |
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| 19. |
| Construct a circle concentric to circle 1, tangent to circle 18 at the upper side. |
| 20. |
| Circles 3, 9 and 19, triangles 4, 10 and 13, and lines 17, are used for the final reconstruction. |
| 21. |
| Remove all parts not visible within the formation itself. |
| 22. |
| Colour all areas corresponding to standing... |
| 23. |
| ...or to flattened crop, and finish the reconstruction of the 2014 Tetbury Lane formation. |
| 24. |
| The final result, matched with the aerial image. |
| Copyright © 2014, Zef Damen, The Netherlands |
