The twin peaks of Mount Ararat served as a major focal point for the Annunaki. A line at forty-five degrees marked the landing path for their space craft, and a combination of natural and artificial landmarks outlined an arrowlike landing corridor. Mount Ararat served as the northern landmark, anchoring the Landing Corridor and the Landing Path in the centre of the corridor.The Southern line of the Landing Corridor was a line connecting Ararat with the highest peak in the Sinai Peninsula, the Harsag (Mt St Katherine) and its twin, the slightly lower Mount Moses.
The Northern line of the Landing Corridor was a line extending from Ararat through the pre-deluge landing platform construction at Baalbek, and continuing into Egypt. There the terrain was too flat to offer any natural landmarks, and so it was that the Anunnaki proceeded to build the artificial peaks of the two Great Pyramids at Giza.
In order to erect an anchor to the pattern, an east to west imaginary line was conceived by the Anunnaki in their space sciences. They arbitrarily divided the skies which enveloped the Earth into three bands or 'ways'. The northern band was the 'Way Of Enlil'; the southern band was the 'Way of Enki' and the central band was the 'Way of Anu'. Seperating them were the lines which are known as the 30th parallel north and the 30th parallel south.
The 30th parallel north appears to have been of particular 'sacred' significance. Holy cities from ancient times have been located on it. It was chosen to be the line on which the great pyramids were to be built, and also the line which would indicate, in the Sinai's central plain, the site of the Anunnaki Spaceport. A line in the precise middle of the Landing Corridor, the Landing Path was lead to the exact location of the Spaceport on the 30th parallel.
This is how it has been assumed that the Landing Grid was laid out; how the size of the Spaceport was marked off, and how the great pyramids of Giza came into being.
The three pyramids of Giza would have been constructed by first erecting the smaller Third pyramid as a scale model. Then, in keeping with the preference for twin-peaked focal points, the two large pyramids were erected.
Source: 'The Wars Of Gods And Men' by Zecharia Sitchin