2018 Longwood Warren formation
|
Reconstruction of the 2018 Longwood Warren formation | ||
| 1. |
| Draw a circle. Draw the horizontal and vertical centerlines. |
| 2. |
| Construct the inscribed nonagon (regular 9-sided polygon) of circle 1, pointing down. Draw the nine rays of circle 1 to the angular points. Number the angular points, as well as the rays clockwise 1 - 9, starting at the top right. |
| 3. |
| Draw nine diagonals of nonagon 2, between the following pairs of angular points: 1-4, 2-5, 3-6, 4-7, 5-8, 6-9, 7-1, 8-2, 9-3. |
| 4. |
| Construct the circumscribed nonagon of circle 1, pointing up. |
| 5. |
| Draw the connecting line between the top left and top right angular points of nonagon 4. |
| 6. |
| Construct a circle centered at the intersection of line 5 and the vertical centerline, tangent to diagonals 3 1-4 and 6-9. |
| 7. |
| Copy circle 6 to the center of circle 1. |
| 8. |
| Construct the "two-points" circle (defined by the two end-points of a centerline) between the upper intersection of circle 7 and the lower intersection of circle 1, with the vertical centerline. |
| 9. |
| Construct a circle concentric to circle 8, tangent to the lowest sides of nonagon 2. |
| 10. |
| Construct a circle centered at the (lefthand) intersection of circle 8 and the lowest lefthand side of nonagon 2, passing through the righthand intersection of circle 9 and diagonal 3 3-6. |
| 11. |
| Construct a circle concentric to circle 1, tangent to circle 10 at the near side. |
| 12. |
| Construct a circle centered at the intersection of diagonals 3 7-1 and 9-3, tangent to rays 2 nrs. 1 and 9. |
| 13. |
| Copy circle 12 to the center of circle 1. |
| 14. |
| Construct a circle concentric to circle 8, passing through the intersection of diagonal 3 1-4 and the horizontal centerline. |
| 15. |
| Copy circle 8 eight times, to the corresponding positions with respect to the other rays 2. |
| 16. |
| Copy circle 9 eight times, to the corresponding positions with respect to the other rays 2. |
| 17. |
| Copy circle 14 eight times, to the corresponding positions with respect to the other rays 2. |
| 18. |
| Copy circle 10 eight times, to the corresponding positions with respect to the other sides of nonagon 2. |
| 19. |
| Remove all parts from circles 8 and 15, such that the shown pattern remains. |
|
| ||
| 20. |
| Remove all parts from circles 8, 9, 14, 15, 16, and 17, such that the shown patterns remain. |
|
| ||
| 21. |
| Remove all parts from circles 7, 9, 10, 16, and 18, such that the shown patterns remain. |
|
| ||
| 22. |
| Circles 11, and 13, and patterns 19, 20, and 21, together, make up the final reconstruction. |
| 23. |
| Colour all areas corresponding to standing... |
| 24. |
| ...or to flattened crop, and finish the reconstruction of the 2018 Longwood Warren formation. |
| 25. |
| The final result, matched with the aerial image. |
| Copyright © 2018, Zef Damen, The Netherlands |
