Reconstruction of the 2017 Little Knoll formation | ||

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

2. |
Construct the inscribed pentagon (regular five-sided polygon) of circle 1, pointing up. | |

3. |
Draw the five diagonals of pentagon 2. | |

4. |
Construct the inscribed circle of the pentagon enclosed by diagonals 3. | |

5. |
Construct a circle centered at the lower intersection of circle 1 and the vertical centerline, passing through the lower righthand angular point of pentagon 2. | |

6. |
Copy circle 5 to the center of circle 1. | |

7. |
Construct the circumscribed pentagon of circle 6, pointing up. | |

8. |
Construct the inscribed pentagon of circle 6, pointing up. | |

9. |
Construct the inscribed circle of pentagon 8. | |

10. |
Copy circle 9 five times, to the angular points of pentagon 2. | |

11. |
Draw the connecting line between the intersections of the upper circle 10 and the upper two diagonals 3, as shown. | |

12. |
Construct a circle concentric to the upper circle 10, tangent to line 11. | |

13. |
Copy circle 12 four times, to the centers of the other circles 10. | |

14. |
Construct a circle tangent to the lower two diagonals 3, and tangent to circle 4 at the lower side. | |

15. |
Copy circle 14 to the righthand intersection of circle 1 and the horizontal centerline. | |

16. |
Construct a circle concentric to circle 1, tangent to circle 15 at the righthand side. | |

17. |
Construct the "two-points" circle (defined by the two end-points of a centerline) between the lower intersections of the upper circle 10 and circle 12 with the vertical centerline. | |

18. |
Copy circle 17 to the center of circle 1. | |

19. |
Copy circle 17 five times, to the centers of circles 10. | |

20. |
Construct five pairs of parallel lines, all tangent to circle 18, and each tangent to one of the circles 19, all at both sides, as shown. See detail. | |

21. |
Circles 1, 4, 10, 12, 13, and 16, pentagons 2, and 7, and lines 20, are used for the final reconstruction. | |

22. |
Remove all parts not visible within the formation itself. | |

23. |
Colour all areas corresponding to standing... | |

24. |
...or to flattened crop, and finish the reconstruction of the 2017 Little Knoll formation. | |

25. |
The final result, matched with two aerial images. |

Copyright © 2017, Zef Damen, The Netherlands |