Perpendicularity of the directions to Lhasa and Mecca in Sigiriya we found, considering the hexagram. Now, thanks to the octagon focused on the parts of the world, it turns out that the line is not just perpendicular but attached through the angles of octagon to the axis North-South.
Having turned the octagon on 3degrees counterclockwise, we will get the direction to two essential points of system - Easter island and St. Petersburg, which as it turns out, lie on the same line, as well as the azimuth of Vatican.
Let’s consider two more perpendicular directions to Mohenjo-Daro and Great Zimbabwe. To do this, turn the octagon on 7.6 degrees counterclockwise.
In this position the octagon gives another direction to Por Bajin from which to the direction to Mohenjo-Daro are 45.05degrees.
Then turn the octagon on 9.3 degrees clockwise. In this position, octagon determines with an error of 0.6 degree the direction to the Great pyramid and Lalibela, between which are 23.1degrees.
Having turned octagon on 14 degrees clockwise, we will obtain the coincidence of the directions to Uluru and Solomon temple , which lie on the same line, as well as directions to Great Zimbabwe. The angle between the lines is equal to 66.68 degrees (0.82 degree).