Reconstruction of the
Barbury Castle 1-06-2008 formation

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

2. Construct the inscribed decagon (regular 10-sided polygon) of circle 1, pointing up.

3. Construct a "two-points" circle, defined by the end-points of a centerline (diameter), with one point at the intersection of the righthand side of decagon 2, the other point at the righthand intersection of circle 1, both with the horizontal centerline.

4. Copy circle 3 to its lefthand intersection with the horizontal centerline; repeat this with this, and every newly created circle consecutively, 32 more times, 33 circles in total. Number the circles in the same order from 1 through 33.

5. Construct a circle concentric to circle 1, tangent to circle 4 nr. 33 at the lefthand side.

6. Construct 18 circles, all concentric to circle 1, passing respectively through the centers of circles 4 nrs. 3, 4, 5, 11, 13, 14, 16, 17, 19, 20, 22, 23, 25, 26, 28, 29, 31 and 32.

7. Construct a circle concentric to circle 1, passing through the center of circle 4 nr. 10.

8. Construct a circle concentric to circle 1, passing through the center of circle 4 nr. 9.

9. Construct a circle concentric to circle 1, passing through the center of circle 4 nr. 8.

10. Construct a circle concentric to circle 1, passing through the center of circle 4 nr. 7.

11. Construct a circle concentric to circle 1, passing through the center of circle 4 nr. 6.

12. Construct a "two-points" circle, with the points at the center of circle 3 and the righthand intersection of circle 1 and the horizontal centerline.

13. Copy circle 12 to its own righthand intersection with the horizontal centerline.

14. Construct a circle concentric to circle 1, tangent to circle 13 at the righthand side.

15. Draw the ten rays (from the center of circle 1 to the angular points) of decagon 2.

16. Copy circle 12 to the top angular point of decagon 2.

17. Copy circle 12 to the upper intersection of circle 5 and the vertical centerline.

18. Draw two lines, both tangent to both circles 16 and 17, one to the lefthand, the other to the righthand sides.

19. Repeat steps 16, 17 and 18 nine more times, relative to the other nine rays 15, as shown.

20. Construct a "two-points" circle, between the upper intersections of circles 7 and 14, both with the vertical centerline, as shown.

21. Construct a circle concentric to circle 20, tangent to circle 8 at the upper side.

(For clarity, circles 6 are left out for the moment).

22. Construct a circle concentric to circle 14 (and circle 1), passing through the center of circle 20.

23. Copy circle 20 to the righthand intersection of circles 21 and 22.

24. Copy circle 21 to the center of circle 23.

25. Copy circle 21 to the righthand intersection of circles 24 and 22, and move it (copy and delete original) to its own corresponding intersection.

26. Construct a circle concentric to circle 20, tangent to circle 9 at the upper side.

27. Copy circle 26 to the center of circle 25.

28. Construct a circle concentric to circle 20, tangent to circle 10 at the upper side.

29. Copy circle 28 to the righthand intersection of circles 27 and 22, and move it to its own corresponding intersection.

30. Construct a circle concentric to circle 20, tangent to circle 11 at the upper side.

31. Copy circle 30 to the center of circle 29.

32. Find the intersection of the innermost circle 6 and the lower of the two lines 19, parallel to the righthand ray 15 just below the horizontal centerline. Copy circle 3 to this point.

33. Copy circle 12 to the lower intersection of the innermost circle 6 and circle 32.

34. Copy circle 3 to the lower intersection of the innermost circle 6 and circle 33. See detail.

35. Construct a circle concentric to circle 3, tangent to circle 14 at the righthand side.

36. Copy circle 35 to the center of circle 14 (and circle 1).

37. Copy circle 35 to the upper end-point of the upperright ray 15 just right of the vertical centerline.

38. Draw a line tangent to circles 36 and 37, both at the lefthand sides.

39. Copy circle 35 to the lower end-point of the lowerleft ray 15 just left of the vertical centerline.

40. Draw a line tangent to circles 36 and 39, both at the righthand sides.

41. Circles 5, 6, 7, 8, 9, 10, 11, 14, 23, 24, 25, 27, 29, 31 and 34, and lines 18, 19, 38 and 40, are all used for the final reconstruction.

41a. To prepare for the next step, follow the red line from the center to the periphery for the required path with the rachets, and follow the green line for the peripheral "dike-like" border.

42. Remove all superfluous parts, not visible in the formation itself.

High resolution dwf-file

43. Colour all areas corresponding to standing...

High resolution dwf-file

44. ...or to flattened crop. This completes the reconstruction of the Barbury Castle formation of 1-06-2008.

High resolution dwf-file

45.
courtesy the Crop Circle Connector
photo by: John Montgomery
The final result, matched with the aerial image.