2011 Barbury Castle (2) formation
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Reconstruction of the 2011 Barbury Castle (2) formation | ||
| 1. |
| Draw a circle. Draw and extend the horizontal and vertical centerlines. |
| 2. |
| Copy circle 1 to its righthand intersection with the horizontal centerline, and move this circle (copy and delete orignal) to its own corresponding intersection. |
| 3. |
| Construct a circle concentric to circle 1, tangent to circle 2 at the righthand side. |
| 4. |
| Construct the inscribed nonagon (regular 9-sided polygon) of circle 3, pointing to the right. |
| 5. |
| Construct the inscribed circle of nonagon 4. |
| 6. |
| Construct a circle, tangent to the two rightmost sides of nonagon 4, and tangent to circle 5 at the righthand side. |
| 7. |
| Copy circle 6 to the center of circle 2. |
| 8. |
| Copy circle 6 to the lefthand intersection of circle 5 and the horizontal centerline. |
| 9. |
| Construct a "two-points" circle (defined by the two end-points of a centerline) between the lefthand intersection of circle 7 and the righthand intersection of circle 8, both with the horizontal centerline. |
| 10. |
| Copy circle 6 to the righthand intersection of circle 1 and the horizontal centerline. |
| 11. |
| Construct a "two-points" circle between the righthand intersections of circles 8 and 10 with the horizontal centerline. |
| 12. |
| Copy circle 1 to the center of circle 8. |
| 13. |
| Construct a "two-points" circle between the righthand intersection of circle 8 and the horizontal centerline, and the center of circle 10. |
| 14. |
| Construct a circle centered at the righthand intersection of circle 5 and the horizontal centerline, tangent to circle 9 at the righthand side. |
| 15. |
| Construct a circle concentric to circle 1, tangent to circle 14 at the righthand side. |
| 16. |
| Copy circle 6 to the righthand intersection of circle 15 and the horizontal centerline. |
| 17. |
| Construct a "two-points" circle between the center of circle 8 and the lefthand intersection of circle 16 and the horizontal centerline. |
| 18. |
| Construct a "two-points" circle between the lefthand intersections of circles 1 and 13 with the horizontal centerline. |
| 19. |
| Copy circle 18 to the center of circle 16. |
| 20. |
| Construct a circle concentric to circle 1, tangent to circle 19 at the righthand side. |
| 21. |
| Copy circle 6 two times, the first to the righthand intersection of circle 20, the second to the lefthand intersection of the first, both with the horizontal centerline. |
| 22. |
| Construct a circle concentric to the first circle 21, tangent to the second at the lefthand side. |
| 23. |
| Copy circle 22 to its lower intersection with circle 20, and move this circle to its own corresponding intersection. |
| 24. |
| Construct a "two-points" circle between the inner intersections of circles 21 with the horizontal centerline, as shown. |
| 25. |
| Copy circle 24 to the center of circle 23. |
| 26. |
| Copy circle 22 to the upper intersection of circle 20 and the vertical centerline. |
| 27. |
| Copy circle 1 to the lower intersection of circle 26 and the vertical centerline. |
| 28. |
| Construct a circle concentric to circle 1, tangent to circle 27 at the upper side. |
| 29. |
| Copy circle 22 to the center of circle 27. |
| 30. |
| Construct a circle centered at the upper intersection of circle 28 and the vertical centerline, tangent to circle 29 at the lower side. |
| 31. |
| Copy circle 6 to the lefthand intersection of circles 28 and 30. |
| 32. |
| Circles 1, 5, 9, 11, 13, 15, 17, 23, 25 and 31, together, make up the final reconstruction. |
| 33. |
| Colour all areas corresponding to standing... |
| 34. |
| ...or to flattened crop, and finish the reconstruction of the 2011 Barbury Castle (2) formation. |
| 35. |
| The final result, matched with the aerial image. |
| Copyright © 2011, Zef Damen, The Netherlands |
