Reconstruction of the 2015 Etchilhampton (2) formation | ||

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

2. |
Construct the inscribed regular 18-sided polygon of circle 1, pointing to the right. | |

3. |
Draw the connecting line between the righthand angular points of polygon 2 just above and below the horizontal centerline. | |

4. |
Draw the connecting line between the center of circle 1 and the intersection of line 3 and the horizontal centerline. Divide this line into seven equal parts, and number the nodes from left to right 1 - 6. | |

5. |
Construct a circle concentric to circle 1, passing through node 4 nr. 1. | |

6. |
Construct a circle concentric to circle 1, passing through node 4 nr. 2. | |

7. |
Construct a circle concentric to circle 1, passing through node 4 nr. 3. | |

8. |
Construct a circle concentric to circle 1, passing through node 4 nr. 4. | |

9. |
Construct a circle concentric to circle 1, passing through node 4 nr. 5. | |

10. |
Construct a circle concentric to circle 1, passing through node 4 nr. 6. | |

11. |
Construct a circle concentric to circle 1, passing through the intersection of line 3 and the horizontal centerline. | |

12. |
Draw the eighteen rays of polygon 2, from the center of circle 1 to the angular points. Number the rays clockwise 1 - 18, starting at the uppermost righthand angular point. | |

13. |
Draw two connecting lines, one between the intersection of ray 12 nr. 1 and circle 11 and the intersection of ray 12 nr. 2 and circle 10, the other between the intersection of ray 12 nr. 1 and circle 10 and the intersection of ray 12 nr. 2 and circle 11. | |

14. |
Repeat step 13 eight times, with respect to pairs of rays 12 nrs. 3 and 4, 5 and 6, 7 and 8, 9 and 10, 11 and 12, 13 and 14, 15 and 16, and 17 and 18. | |

15. |
Draw two connecting lines, one between the intersection of ray 12 nr. 2 and circle 10 and the intersection of ray 12 nr. 3 and circle 9, the other between the intersection of ray 12 nr. 2 and circle 9 and the intersection of ray 12 nr. 3 and circle 10. | |

16. |
Repeat step 15 seven times, with respect to pairs of rays 12 nrs. 4 and 5, 6 and 7, 8 and 9, 10 and 11, 12 and 13, 14 and 15, and 16 and 17. | |

17. |
Draw two connecting lines, one between the intersection of ray 12 nr. 1 and circle 9 and the intersection of ray 12 nr. 2 and circle 8, the other between the intersection of ray 12 nr. 1 and circle 8 and the intersection of ray 12 nr. 2 and circle 9. | |

18. |
Repeat step 17 seven times, with respect to pairs of rays 12 nrs. 5 and 6, 7 and 8, 9 and 10, 11 and 12, 13 and 14, 15 and 16, and 17 and 18. | |

19. |
Circles 1, 5, 6, 7, 8, 9, and 10, and lines 12, 13, 14, 15, 16, 17, and 18, are used for the final reconstruction. | |

20. |
Remove all parts not visible within the formation itself. | |

21. |
Colour all areas corresponding to standing... | |

22. |
...or to flattened crop, and finish the reconstruction of the 2015 Etchilhampton (2) formation. | |

23. |
The final result, matched with the aerial image. |

Copyright © 2015, Zef Damen, The Netherlands |