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Sir Flinders Petrie's 1880–82 survey of the Giza plateau, which included the Great Pyramid of Khufu and the relatively unknown Trial Site, is probably the most detailed Egyptian study ever undertaken by a surveyor.
This is the original edition of 1883 which was sold out during the first few months and never reprinted. A highly abridged second edition, which summarized many of the tables into a few lines of text and omitted much of the technical work, appeared in early 1885.
Other surveys of lesser scope have been conducted on the Giza plateau, but Petrie's contribution stands head and shoulders above them all. His extensive measurements of the Great Pyramid, in particular, have become the standard of reference for virtually all studies of that amazing edifice.
originally posted by: AthlonSavage
Calc 1 >>>
1732 - 429.5 - 250 = 1052.5
Calc 2>>>
440 + 411 + 201.5 = 1052.5
Calc 3>>>
1417.5 - 353.5+ 201.5 -213 = 1052.5
To appreciate the relevance arriving at the same result from three different paths, consider that by just adjusting a single measurement in the Map causes the 3 way synergy of results not to be achieved. When I refer to different paths note that each separate calc uses its own different numbers from the Map, (except for last two equations where 201.5 appears twice).
originally posted by: AthlonSavage
Where i am going with this is to demonstrate to you how they could of used this value practically for creating a system which can be used to convert between measurement scales, with the aim of doing this to measure arc movements of the sun using measurements to record displacement using a 24 hr time scale which is composed of 24 x 60 min = 1440 mins and 1440 x 6 = 86400 seconds.
Since 1 nautical mile is comprised of 2.5 lots of 1417.5 royale cubits
Then the theoretical variation 117.5 is made can vary as much up to the limit of 117.5 / 2.5 = 47 nautical miles
Therefore the 47 nautical mile is the distance tolerance variation I believe the builders of the Giza pyramids are using to male a theoretical calculation of earths circumference).
Now 47 nautical mile divided by longitudinal circumference of earth is 21600 nautical miles
= 47/21600 = 0.002175 a dimensionless fraction value
In a 24 hour time scale ( 1 full circumferential rotation of earth), there are 86400 seconds.
86400 seconds x 0.002175 = 188 (an exact value result no round off required)
188 seconds / 60 seconds = 3.13333 minutes
Therefore in 3.13333 minutes 47 nautical miles are progressed
In one minute 47/ 3.13333 = 15 nautical miles progressed per each minute passed on the 24 hr scale (1440/86400).
Working backwards now to verify result 15 nautical miles of x 1440 minute ( on the 24 hour scale) = 21600 nautical miles the longitudinal circumference of earth.
I believe this was the basis for Giza using 1417.5 length for the longitudinal east west direction.
originally posted by: Harte
a reply to: EvillerBob
The Ancient Egyptians certainly were aware of the number 117.5.
As a length, they knew it as 117 cubits, three palms and 2 fingers.
Harte
originally posted by: EvillerBob
originally posted by: Harte
a reply to: EvillerBob
The Ancient Egyptians certainly were aware of the number 117.5.
As a length, they knew it as 117 cubits, three palms and 2 fingers.
Harte
...good point
But did they know that it represented a margin of error for calculating the circumference of the globe based on the width of the site? Because I suspect they didn't.
I'm trying to find the politest and most diplomatic way possible to suggest that the theory is an inverted pyramid of piffle, cut me some slack
Quote"
Originally, when Bruce was starting his research into the World Grid and harmonics, he plotted sightings of UFOs on a map of New Zealand. After he had plotted a lot of sightings, he noticed that he could draw a set of lines that would connect the sightings. These lines formed a grid pattern and by measuring, he found that the lines were 30′ apart. When I say 30′, I mean 30 minutes of arc or 30 nautical miles. "
originally posted by: AthlonSavage
There are 360 degrees in the circumference of circle (earth). In a single degree there are 60 nautical miles.
Therefore the longitudinal circumference of earth is 21600 nautical miles at equator.
In 1 nautical mile there is 1852 metres which using the (0.52375 metres) converter gives 3536.03818 royal cubits
3536.03818 divided by 1732 by = (3536.03818 / 1732) = 2.04159
The 2.04159 represents the Giza Plateau north south latitudinal direction length 1732 divided into a single nautical mile, the result is theoretically 2.0 Bear with me and i will explain the significance of the rounding error later on. i.e. 2.04159 to 2.0.
The 2.0 x 21600 means there are 43200 lots of the giza 1732 length that will fill the lattitudinal circumference. Think of a scale on a rule that is circle shape and has 43200 graduations.