Petrie seems to have made some mistakes and hopefully, Stephen Brabin’s corrections have solved that problem. Dash also found apparent errors and apparently corrected them. But now after your analysis, it seems there is still a problem with Dash. Can you contact the Glen Dash Foundation and see what they have to say about this?
Does your analysis affect these measurements?:
From the centre of G3 west side to centre of G1 east side, 2000 cubits, 45° N of E:
Dash/Petrie:
2000.9 cubits, 44.934° N of E
Petrie: (G3, 200 x 200 cubits; G1 440 x 440 cubits):
1999.97 cubits, 44.89° N of E
Petrie: (G3, 201.5 x 201.5 cubits; G1 440 x 440 cubits):
2000.5 cubits; 44.875° N of E
Centre of G3 to centre of G1:
Dash/Petrie: 52.228° N of E
Petrie: 52.148° N of E
Chris