2023 Roundway Hill formation
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Reconstruction of the 2023 Roundway Hill formation | ||
| 1. |
| Draw a circle. Draw the horizontal and vertical centerlines. |
| 2. |
| Construct two inscribed nonagons (regular 9-sided polygons) of circle 1, one pointing up, one pointing down. |
| 3. |
| Construct a circle concentric to circle 1, passing through the mutual intersections of nonagons 2. |
| 4. |
| Construct two inscribed nonagons of circle 3, one pointing up, one pointing down. Number the angular points, clockwise, 1 - 18, starting at the top. |
| 5. |
| Draw the diagonal 1-7 (between angular points 4 nrs. 1 and 7), and repeat this seventeen times, for the other corresponding pairs of angular points. |
| 6. |
| Construct a circle concentric to circle 1, passing through the innermost mutual intersections of diagonals 5. |
| 7. |
| Construct the inscribed hexagon (regular 6-sided polygon) of circle 6, pointing up. |
| 8. |
| Construct the inscribed circle of hexagon 7. |
| 9. |
| Construct the inscribed hexagon of circle 8, pointing up. |
| 10. |
| Construct a circle centered at the top of hexagon 9, tangent to diagonal 6-18. |
| 11. |
| Copy circle 10 to the center of circle 1. |
| 12. |
| Draw the four diagonals 2-12, 3-13, 7-17, and 8-18. |
| 13. |
| Construct the "two-points" circle (defined by the two end-points of a centerline) between the intersection of diagonals 2-12 and 8-18, and the intersection of diagonals 3-13 and 7-17. |
| 14. |
| Construct a circle concentric to circle 1, passing through the center of circle 13. |
| 15. |
| Construct the inscribed hexagon of circle 14, pointing up. |
| 16. |
| Copy circle 13 five times, to the other angular points of hexagon 15. |
| 17. |
| Construct the "two-points" circle between the righthand intersections of circle 14 and hexagon 15 with the horizontal centerline. |
| 18. |
| Copy circle 17 six times, to the centers of circles 13 and 16. |
| 19. |
| Construct three pairs of parallel lines, one pair parallel to the vertical centerline, the other two correspondingly, all tangent to circles 18 at both sides, as shown. |
| 20. |
| Circles 1, 6, 8, 11, 13, and 16, lines 5 and 19, and hexagon 9, are used for the final reconstruction. |
| 21. |
| Remove all parts not visible within the formation itself. |
| 22. |
| Colour all areas corresponding to standing... |
| 23. |
| ...or to flattened crop, and finish the reconstruction of the 2023 Roundway Hill formation. |
| 24. |
| The final result, matched with two aerial images. |
| Copyright © 2023, Zef Damen, The Netherlands |
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