2023 Potterne Hill formation
Number the angular points 1 - 18, counterclockwise, starting at the rightmost one.
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Reconstruction of the 2023 Potterne 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 to the right. Number the angular points 1 - 18, counterclockwise, starting at the rightmost one. |
| 3. |
| Construct a circle centered at angular point 2 nr. 1, passing through angular point nr. 2. |
| 4. |
| Construct a circle centered at angular point nr. 2, passing through the center of circle 3. |
| 5. |
| Construct a circle centered at angular point nr. 18, passing through the center of circle 3. |
| 6. |
| Construct a circle centered at the righthand intersection of circles 3 and 4, passing through the center of circle 3. |
| 7. |
| Construct a circle centered at the righthand intersection of circles 3 and 5, passing through the center of circle 3. |
| 8. |
| Construct a circle concentric to circle 1, tangent to circle 3 at the lefthand side. |
| 9. |
| Construct the inscribed nonagon (regular 9-sided polygon) of circle 8, pointing to the left. |
| 10. |
| Construct a circle concentric to circle 3, tangent to the righthand side of nonagon 9. |
| 11. |
| Copy circle 10 to the center of circle 4. |
| 12. |
| Copy circle 10 to the center of circle 5. |
| 13. |
| Copy circle 10 to the center of circle 6. |
| 14. |
| Copy circle 10 to the center of circle 7. |
| 15. |
| Construct a circle concentric to circle 4, tangent to circle 10 at the near side. |
| 16. |
| Construct a circle concentric to circle 1, tangent to circle 15 at the lefthand side. |
| 17. |
| Draw a line between the center of circle 1 and the righthand intersection of circles 3 and 4, and extend this line upto the righthand side of circle 13. |
| 18. |
| Draw a line between the center of circle 4 and the righthand intersection of circles 7 and 11, and extend this line upto the righthand side of circle 14. |
| 19. |
| Construct a circle centered at the intersection of line 18 and circle 13, tangent to circle 11 at the near side. |
| 20. |
| Copy circle 19, while mirroring it with respect to line 17. |
| 21. |
| Copy circle 19, while mirroring it with respect to the horizontal centerline. |
| 22. |
| Draw a line between the center of circle 6 and the righthand intersection of circles 14 and 21, and extend this line upto the lower righthand side of circle 19. |
| 23. |
| Construct a circle centered at the lower righthand intersection of line 22 and circle 19, tangent to circle 13 at the near side. |
| 24. |
| Copy circle 23, while mirroring it with respect to the horizontal centerline. |
| 25. |
| Remove all redundant parts from circles 1, 3, 4, 5, 7, 10, 11, 12, 14, 19, and 20, such that... |
| 26. |
| ...this pattern remains. |
| 27. |
| Remove all redundant parts from circles 6, 7, 11, 12, 13, 14, 19, 21, 23, and 24, such that... |
| 28. |
| ...this pattern remains. |
| 29. |
| Repeat all necessary steps to copy and rotate patterns 26, and 28, together, seventeen times, with respect to the other angular points of polygon 2. |
| 30. |
| Circle 16, and patterns 26, 28, and 29, together, make up the final reconstruction. |
| 31. |
| Colour all areas corresponding to standing... |
| 32. |
| ...or to flattened crop, and finish the reconstruction of the 2023 Potterne Hill formation. |
| 33. |
| The final result, matched with the aerial image. |
| Copyright © 2023, Zef Damen, The Netherlands |
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