2017 Cheesefoot Head formation
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Reconstruction of the 2017 Cheesefoot Head 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 clockwise 1 - 18, starting at the top. |
| 3. |
| Draw the connecting line between angular point (of polygon 2) nr. 13 and the upper intersection of circle 1 and the vertical centerline. |
| 4. |
| Construct a circle concentric to circle 1, tangent to line 3. |
| 5. |
| Draw the connecting line between angular point nr. 12 and the upper intersection of circle 1 and the vertical centerline. |
| 6. |
| Construct a circle concentric to circle 1, tangent to line 5. |
| 7. |
| Draw two rays of polygon 2, from the center of circle 1 to angular points nrs. 1 and 18. |
| 8. |
| Draw the connecting line between angular points nrs. 4 and 14. |
| 9. |
| Construct a circle centered at the intersection of line 8 and the vertical centerline, passing through the intersections of rays 7 and circle 6. |
| 10. |
| Construct a circle centered at the upper intersection of circle 1 and the vertical centerline, tangent to the upper side of polygon 2. |
| 11. |
| Construct a circle concentric to circle 1, tangent to circle 10 at the upper side. |
| 12. |
| Copy circle 10 to the center of circle 1, and move this circle (copy and delete original) to its own lefthand intersection with the horizontal centerline. See detail. |
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| 13. |
| Construct a circle concentric to circle 1, tangent to circle 12 at the lefthand side. |
| 14. |
| Copy circle 10 to angular point nr. 18. |
| 15. |
| Construct a line tangent to circle 13 at the lefthand, and to circle 14 at the righthand side. |
| 16. |
| Repeat step (14 and) 15 seventeen times, with respect to the other angular points of polygon 2, as shown. |
| 17. |
| Repeat step 3 seventeen times, with respect to the other angular points of polygon 2, as shown. |
| 18. |
| Construct a circle centered at the upper intersection of circle 13 and the vertical centerline, passing through the intersections of circle 13 and rays 7. |
| 19. |
| Copy circle 18 two times, to the intersections of line 15 with circle 6, and with the upper side of polygon 2. See detail. |
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| 20. |
| Construct a line parallel to line 15, tangent to circles 19 at the lefthand sides. |
| 21. |
| Repeat step (19 and) 20 seventeen times, with respect to the other angular points of polygon 2, as shown. |
| 22. |
| Circles 4, 6, 9, and 11, and lines 3, 15, 16, 17, 20, and 21, are used for the final reconstruction. |
| 23. |
| Remove all parts not visible within the formation itself. |
| 24. |
| Colour all areas corresponding to standing... |
| 25. |
| ...or to flattened crop, and finish the reconstruction of the 2017 Cheesefoot Head formation. |
| 26. |
| The final result, matched with the aerial image. |
| Copyright © 2017, Zef Damen, The Netherlands |
