15. Guyou map projection¶
sasmodels.guyou
¶
Convert between latitude-longitude and Guyou map coordinates.
- sasmodels.guyou.ellipticFi(phi, psi, m)¶
Returns F(phi+ipsi|m). See Abramowitz and Stegun, 17.4.11.
- sasmodels.guyou.ellipticJi(u, v, m)¶
Returns [sn, cn, dn](u + iv|m).
- sasmodels.guyou.guyou(lam, phi)¶
Transform from (latitude, longitude) to point (x, y)
- sasmodels.guyou.guyou_invert(x, y)¶
Transform from point (x, y) on plot to (latitude, longitude)
- sasmodels.guyou.main()¶
Show the Guyou transformation
- sasmodels.guyou.plot_grid()¶
Plot the latitude-longitude grid for Guyou transform