Reconstruction of the 2017 Cherhill White Horse formation | ||

1. |
Draw a circle. Draw and extend the horizontal and vertical centerlines. | |

2. |
Construct the inscribed heptagon (regular 7-sided polygon) of circle 1, pointing to the right. | |

3. |
Construct the inscribed circle of heptagon 2. | |

4. |
Construct the inscribed heptagon of circle 3, pointing to the right. | |

5. |
Construct the inscribed circle of heptagon 4. | |

6. |
Construct the circumscribed heptagon of circle 1, pointing to the left. | |

7. |
Construct the circumscribed heptagon of (the circumscribed circle of) heptagon 6, pointing to the right. | |

8. |
Repeat this three times.Construct the circumscribed heptagon of heptagon 7, pointing to the left. | |

9. |
Construct the circumscribed heptagon of heptagon 8, pointing to the right. | |

10. |
Construct the circumscribed heptagon of heptagon 9, pointing to the left. | |

11. |
Construct the circumscribed circle of heptagon 10. | |

12. |
Extend the upper and lower lefthand sides of heptagon 10 to the left, upto the horizontal centerline. | |

13. |
Construct a circle centered at the lefthand angular point of heptagon 10, tangent to circle 1 at the lefthand side. | |

14. |
Copy circle 13 to the intersection of lines 12, and move this circle (copy and delete original) to its own righthand intersection with the horizontal centerline. | |

15. |
Construct a circle centered at the lefthand intersection of circle 1 and the horizontal centerline, tangent to circle 3 at the lefthand side. | |

16. |
Construct a circle concentric to circle 15, tangent to circle 5 at the lefthand side. | |

17. |
Copy circles 15 and 16 to the righthand intersection of circle 14 and the horizontal centerline. | |

18. |
Construct two circles concentric to circle 14, tangent to circles 17 at the lefthand sides. | |

19. |
Construct a "two-points" circle (defined by the two end-points of a centerline) between the lefthand intersections of circles 3 and 5 with the horizontal centerline. | |

20. |
Construct a circle concentric to circle 19, tangent to circle 1 at the lefthand side. | |

21. |
Construct a circle concentric to circle 19, tangent to circle 15 at the lefthand side. | |

22. |
Copy circles 19, 20, and 21 two times, to the centers of circles 1 and 14. See detail. | |

23. |
Construct three pairs of parallel lines, tangent to circles 22 at both sides. See detail. | |

24. |
Construct a "two-points" circle between the lefthand intersection of circle 5 and the righthand intersection of the outer righthand circle 22 with the horizontal centerline. | |

25. |
Circles 1, 3, 5, 11, 14, 18, and 24, and lines 23, are used for the final reconstruction. | |

26. |
Remove all parts not visible within the formation itself. | |

27. |
Colour all areas corresponding to standing... | |

28. |
...or to flattened crop, and finish the reconstruction of the 2017 Cherhill White Horse formation. | |

29. |
The final result, matched with the aerial image. |

Copyright © 2017, Zef Damen, The Netherlands |