2017 Little Knoll formation
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Reconstruction of the 2017 Little Knoll formation | ||
| 1. |
| Draw a circle. Draw and extend the horizontal and vertical centerlines. |
| 2. |
| Construct the inscribed pentagon (regular five-sided polygon) of circle 1, pointing up. |
| 3. |
| Draw the five diagonals of pentagon 2. |
| 4. |
| Construct the inscribed circle of the pentagon enclosed by diagonals 3. |
| 5. |
| Construct a circle centered at the lower intersection of circle 1 and the vertical centerline, passing through the lower righthand angular point of pentagon 2. |
| 6. |
| Copy circle 5 to the center of circle 1. |
| 7. |
| Construct the circumscribed pentagon of circle 6, pointing up. |
| 8. |
| Construct the inscribed pentagon of circle 6, pointing up. |
| 9. |
| Construct the inscribed circle of pentagon 8. |
| 10. |
| Copy circle 9 five times, to the angular points of pentagon 2. |
| 11. |
| Draw the connecting line between the intersections of the upper circle 10 and the upper two diagonals 3, as shown. |
| 12. |
| Construct a circle concentric to the upper circle 10, tangent to line 11. |
| 13. |
| Copy circle 12 four times, to the centers of the other circles 10. |
| 14. |
| Construct a circle tangent to the lower two diagonals 3, and tangent to circle 4 at the lower side. |
| 15. |
| Copy circle 14 to the righthand intersection of circle 1 and the horizontal centerline. |
| 16. |
| Construct a circle concentric to circle 1, tangent to circle 15 at the righthand side. |
| 17. |
| Construct the "two-points" circle (defined by the two end-points of a centerline) between the lower intersections of the upper circle 10 and circle 12 with the vertical centerline. |
| 18. |
| Copy circle 17 to the center of circle 1. |
| 19. |
| Copy circle 17 five times, to the centers of circles 10. |
| 20. |
| Construct five pairs of parallel lines, all tangent to circle 18, and each tangent to one of the circles 19, all at both sides, as shown. See detail. |
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| 21. |
| Circles 1, 4, 10, 12, 13, and 16, pentagons 2, and 7, and lines 20, are used for the final reconstruction. |
| 22. |
| Remove all parts not visible within the formation itself. |
| 23. |
| Colour all areas corresponding to standing... |
| 24. |
| ...or to flattened crop, and finish the reconstruction of the 2017 Little Knoll formation. |
| 25. |
| The final result, matched with two aerial images. |
| Copyright © 2017, Zef Damen, The Netherlands |
