Measured against the map
C = 2 × π × radius
| Earth radius, measured | 3,959 mi / 6,371 km |
| Pole to equator, along the ground | 6,215 mi / 10,002 km |
| Equator this map draws | 39,050 mi |
| Equator actually measured | 24,901 mi |
| Overstated by | 1.568 × |
The plate draws the 6,215 mi pole-to-equator distance as a straight radius. On a sphere that distance is a curved arc over a 3,959 mi radius, which closes the equator at 24,901 mi. Flatten the arc and the equator has to grow by 57 per cent.
The local sun, on its own claimed figures
| ClaimedSun diameter | 32 mi |
| ClaimedHeight above the plate | 3,000 mi |
| Track radius now | — |
| Speed this requires | — |
| Observer to sun, along the ground | — |
| Elevation at the observer | — |
| Apparent width this needs | — |
| MeasuredApparent width, all day | 0.53° constant |
Azimuthal Flat Map
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