The Great Pyramid of Giza, a well known ancient monument on the outskirts of Cairo, has had its internal architecture analysed in the previous papers in this series in which the vertical and horizontal interlocking nature of the chambers within the building has been established. It was shown within this body of work that the architecture of the Great Pyramid contains a scale model of the Earth within it, and that two of the fundamental parameters of the Earth's reference ellipsoid are explicitly defined in the architecture.

In this paper I show that the cubit length of the base of the pyramid, which is explicitly documented on the north wall of the upper chamber of the building, is precisely half the circumference of the Earth model that is found within the architecture. I then show, by way of conjecture, that there is a secondary principal unit of measurement contained in the pyramid which is defined from the circumference of the Earth in an identical manner to the definition of the modern meter.

I then determine that the cubit length, which is the commonly accepted measurement unit used by the builders within the Great Pyramid, is defined from the latitude of the building when expressed in radians, and thereby determine the original value for the latitude of the pyramid.

By comparing the current and original latitudes of the pyramid I calculate the movement of the African tectonic plate upon which the pyramid is built and show that this value falls within the measurement error margins of modern GPS station movement results and thereby verify the conjecture regarding the pyramid's units of measurement and their relationship to the building's latitude.

Having determined the method of definition of the cubit I then quantify the dimensions of the model of the Earth that is contained within the pyramid in metric units and show that it is based upon a full sized reference ellipsoid that is indistinguishable in size and proportions from our modern WGS84 reference datum.