Definition:Hayford Spheroid
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Definition
The Hayford spheroid is defined by:
- its semi-major axis $a = 6 \, 378 \, 388 \cdotp 000 \, \mathrm m$
- its flattening $f = 1:297 \cdotp 00$
- its minor axis $b = 6 \, 356 \, 912 \cdotp 000 \, \mathrm m$
Geodetic Constants
| Latitude | Length of $1$ Minute of Longitude: $\mathrm m$ | Length of $1$ Minute of Latitude: $\mathrm m$ | Local Gravitational Constant: $\mathrm {m \, s^{-2} }$ |
|---|---|---|---|
| $0 \degrees$ | $1 \, 855 \cdotp 398$ | $1 \, 842 \cdotp 925$ | $9 \cdotp 780 \, 350$ |
| $15 \degrees$ | $1 \, 792 \cdotp 580$ | $1 \, 844 \cdotp 170$ | $9 \cdotp 783 \, 800$ |
| $30 \degrees$ | $1 \, 608 \cdotp 174$ | $1 \, 847 \cdotp 580$ | $9 \cdotp 793 \, 238$ |
| $45 \degrees$ | $1 \, 314 \cdotp 175$ | $1 \, 852 \cdotp 256$ | $9 \cdotp 806 \, 154$ |
| $60 \degrees$ | $930 \cdotp 047$ | $1 \, 856 \cdotp 951$ | $9 \cdotp 819 \, 099$ |
| $75 \degrees$ | $481 \cdotp 725$ | $1 \, 860 \cdotp 401$ | $9 \cdotp 828 \, 593$ |
| $90 \degrees$ | $0$ | $1 \, 861 \cdotp 666$ | $9 \cdotp 832 \, 072$ |
Also see
- Results about the Hayford spheroid can be found here.
Source of Name
This entry was named for John Fillmore Hayford.
Sources
- 1964: Milton Abramowitz and Irene A. Stegun: Handbook of Mathematical Functions ... (previous) ... (next): $2$. Physical Constants and Conversion Factors: Table $2.6$ Geodetic Constants