Sinusoidal (Sanson-Flamsteed)¶
Classification |
Pseudocylindrical |
Available forms |
Forward and inverse, spherical and ellipsoidal |
Defined area |
Global |
Alias |
sinu |
Domain |
2D |
Input type |
Geodetic coordinates |
Output type |
Projected coordinates |
MacBryde and Thomas developed generalized formulas for several of the pseudocylindricals with sinusoidal meridians:
\[x = C\lambda(m+cos\theta) / ( m + 1)\]
\[y = C\theta\]
\[C = \sqrt { (m + 1 ) / n }\]
Parameters¶
Note
All parameters are optional for the Sinusoidal projection.
- +lon_0=<value>¶
Longitude of projection center.
Defaults to 0.0.
- +R=<value>¶
Radius of the sphere, given in meters. If used in conjunction with
+ellps
,+R
takes precedence.See Ellipsoid size parameters for more information.
- +x_0=<value>¶
False easting.
Defaults to 0.0.
- +y_0=<value>¶
False northing.
Defaults to 0.0.