Reconstruction of the 2017 Cherhill White Horse formation | ||
1. | Draw a circle. Draw and extend the horizontal and vertical centerlines. | |
2. | Construct the inscribed heptagon (regular 7-sided polygon) of circle 1, pointing to the right. | |
3. | Construct the inscribed circle of heptagon 2. | |
4. | Construct the inscribed heptagon of circle 3, pointing to the right. | |
5. | Construct the inscribed circle of heptagon 4. | |
6. | Construct the circumscribed heptagon of circle 1, pointing to the left. | |
7. | Construct the circumscribed heptagon of (the circumscribed circle of) heptagon 6, pointing to the right. | |
8. | Repeat this three times. Construct the circumscribed heptagon of heptagon 7, pointing to the left. | |
9. | Construct the circumscribed heptagon of heptagon 8, pointing to the right. | |
10. | Construct the circumscribed heptagon of heptagon 9, pointing to the left. | |
11. | Construct the circumscribed circle of heptagon 10. | |
12. | Extend the upper and lower lefthand sides of heptagon 10 to the left, upto the horizontal centerline. | |
13. | Construct a circle centered at the lefthand angular point of heptagon 10, tangent to circle 1 at the lefthand side. | |
14. | Copy circle 13 to the intersection of lines 12, and move this circle (copy and delete original) to its own righthand intersection with the horizontal centerline. | |
15. | Construct a circle centered at the lefthand intersection of circle 1 and the horizontal centerline, tangent to circle 3 at the lefthand side. | |
16. | Construct a circle concentric to circle 15, tangent to circle 5 at the lefthand side. | |
17. | Copy circles 15 and 16 to the righthand intersection of circle 14 and the horizontal centerline. | |
18. | Construct two circles concentric to circle 14, tangent to circles 17 at the lefthand sides. | |
19. | Construct a "two-points" circle (defined by the two end-points of a centerline) between the lefthand intersections of circles 3 and 5 with the horizontal centerline. | |
20. | Construct a circle concentric to circle 19, tangent to circle 1 at the lefthand side. | |
21. | Construct a circle concentric to circle 19, tangent to circle 15 at the lefthand side. | |
22. | Copy circles 19, 20, and 21 two times, to the centers of circles 1 and 14. See detail. | |
23. | Construct three pairs of parallel lines, tangent to circles 22 at both sides. See detail. | |
24. | Construct a "two-points" circle between the lefthand intersection of circle 5 and the righthand intersection of the outer righthand circle 22 with the horizontal centerline. | |
25. | Circles 1, 3, 5, 11, 14, 18, and 24, and lines 23, are used for the final reconstruction. | |
26. | Remove all parts not visible within the formation itself. | |
27. | Colour all areas corresponding to standing... | |
28. | ...or to flattened crop, and finish the reconstruction of the 2017 Cherhill White Horse formation. | |
29. | The final result, matched with the aerial image. |
Copyright © 2017, Zef Damen, The Netherlands |