2011 Hackpen Hill formation
|
Reconstruction of the 2011 Hackpen Hill formation | ||
| 1. |
| Draw a circle. Draw and extend the horizontal and vertical centerlines. |
| 2. |
| Construct the inscribed regular 18-sided polygon of circle 1, pointing up. |
| 3. |
| Construct a "two-points" circle (defined by the two end-points of a centerline) between the top and the next angular point to the right of polygon 2. |
| 4. |
| Copy circle 3 to the center of circle 1. |
| 5. |
| Construct the inscribed equilateral triangle of circle 1, pointing up. |
| 6. |
| Construct a circle centered at the top of triangle 5, tangent to circle 4 at the upper side. |
| 7. |
| Copy circle 6 to the lower lefthand angular point of triangle 5. |
| 8. |
| Copy circle 6 to the lower righthand angular point of triangle 5. |
| 9. |
| Copy circle 3 to the righthand intersection of circles 1 and 6 (call this point "A"). Move this circle (copy and delete original) to its own upper lefthand intersection with circle 1. |
| 10. |
| Copy circle 3 to the upper intersection of circles 1 and 7 (call this point "B"). Move this circle to its own lower intersection with circle 1. |
| 11. |
| Construct a circle centered at the upper lefthand intersection of circles 1 and 9, passing through point A. |
| 12. |
| Construct a circle centered at the lower intersection of circles 1 and 10, passing through point B. |
| 13. |
| Construct a "two-points" circle between the lefthand intersections of circles 9 and 11 with circle 1. |
| 14. |
| Draw the connecting line between the centers of circles 1 and 13, and extend this line up to the opposite side of circle 13. |
| 15. |
| Construct a circle centered at the intersection of circle 1 and line 14, passing through point A. |
| 16. |
| Copy circle 15 to point B, and move this circle to its own lower intersection with circle 1. |
| 17. |
| Construct a circle centered at the lefthand intersection of circles 1 and 11, passing through point A. |
| 18. |
| Construct a circle centered at the lower intersection of circles 1 and 12, passing through point B. |
| 19. |
| Construct a circle concentric to circle 6, passing through the intersection of circle 17 and the righthand side of triangle 5. |
| 20. |
| Copy circle 19 to the center of circle 8. |
| 21. |
| Construct a circle centered at the intersection of circle 17 and the righthand side of triangle 5, tangent to circle 6 at the near side. |
| 22. |
| Copy circle 21 to point A. |
| 23. |
| Construct a circle concentric to circle 11, tangent to circle 22 at the lefthand side. |
| 24. |
| Construct a circle concentric to circle 15, tangent to circle 22 at the lefthand side. |
| 25. |
| Construct a circle concentric to circle 17, tangent to circle 22 at the lefthand side. |
| 26. |
| Circles 1, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 18, 20, 23, 24 and 25, are used for the final reconstruction. |
| 27. |
| Remove all parts not visible within the formation itself. |
| 28. |
| Colour all areas corresponding to standing... |
| 29. |
| ...or to flattened crop, and finish the reconstruction of the 2011 Hackpen Hill formation. |
| 30. |
| The final result, matched with the aerial image. |
| Copyright © 2011, Zef Damen, The Netherlands |
