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. | |
18. | Copy circle 7 to the top of outermost triangle 13. See detail. | |
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 |