2020 Etchilhampton Hill formation
|
Reconstruction of the 2020 Etchilhampton Hill formation | ||
| 1. |
| Draw a circle. Draw and extend the horizontal and vertical centerlines. |
| 2. |
| Construct the inscribed nonagon (regular 9-sided polygon) of circle 1, pointing up. Number the angular points clockwise 1 - 9, starting at the top. |
| 3. |
| Draw the diagonal of nonagon 2 between angular points nrs. 1 and 5. Repeat this eight times, for the other corresponding angular points. |
| 4. |
| Construct a circle (concentric to circle 1) passing through the innermost intersections of diagonals 3. |
| 5. |
| Construct a circle (concentric to circle 1) passing through the outermost inner intersections of diagonals 3. |
| 6. |
| Construct a circle centered at angular point nr. 1, passing through angular point nr. 2. |
| 7. |
| Construct a circle concentric to circle 1, tangent to circle 6 at the lower side. |
| 8. |
| Construct a circle centered at the upper intersection of circle 5 and the vertical centerline, tangent to circle 7 at the upper side. |
| 9. |
| Construct a circle concentric to circle 1, tangent to circle 8 at the upper side. |
| 10. |
| Construct the circumscribed nonagon of circle 1, pointing down. |
| 11. |
| Construct the circumscribed circle of nonagon 10. |
| 12. |
| Construct a circle centered at the intersection of the lower side of nonagon 2 and the vertical centerline, tangent to circle 1 at the lower side. |
| 13. |
| Copy circle 12 to the upper intersection of circle 11 and the vertical centerline, and move this circle (copy and delete original) to its own corresponding intersection. |
| 14. |
| Construct a circle concentric to circle 1, tangent to circle 13 at the upper side. |
| 15. |
| Copy circle 8 to the righthand intersection of circle 14 and the horizontal centerline. |
| 16. |
| Construct a circle concentric to circle 1, tangent to circle 15 at the lefthand side. |
| 17. |
| Copy circle 6 to angular point nr. 8. |
| 18. |
| Construct a circle concentric to circle 1, passing through the lower righthand intersection of circles 6 and 17. |
| 19. |
| Construct the inscribed equilateral triangle of circle 18, pointing up. |
| 20. |
| Construct the inscribed circle of triangle 19. |
| 21. |
| Construct a circle centered at angular point nr. 1, passing through angular point nr. 3. |
| 22. |
| Copy circle 6 seven times, to angular points nrs. 2, 3, 4, 5, 6, 7, and 9. |
| 23. |
| Copy circle 21 eight times, to all other angular points of nonagon 2. |
| 24. |
| Copy circle 12 to the lower righthand intersection of circles 17 and 21. |
| 25. |
| Repeat step 24 eight times, to all other corresponding intersections of circles 6, 22, and 23. |
| 26. |
| Construct a circle centered at the lower intersection of circle 21 and the vertical centerline, tangent to circle 20 at the lower side. |
| 27. |
| Construct a circle concentric to circle 21, tangent to circle 26 at the lower side. |
| 28. |
| Copy circle 27 eight times, to the centers of circles 23. |
| 29. |
| Circles 4, 5, 6, 7, 9, 11, 14, 16, 17, 20, 21, 22, 23, 24, 25, 27, and 28, are used for the final reconstruction. |
| 30. |
| Remove all parts not visible within the formation itself. |
| 31. |
| Colour all areas corresponding to standing... |
| 32. |
| ...or to flattened crop, and finish the reconstruction of the 2020 Etchilhampton Hill formation. |
| 31. |
| The final result, matched with the aerial image. |
| Copyright © 2020, Zef Damen, The Netherlands |
