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.

Note

The default convention is to interpret this value as decimal degrees. To specify radians instead, follow the value with the "r" character.

Example: +lon_0=1.570796r

See Projection Units for more information.

+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, in meters.

Defaults to 0.0.

+y_0=<value>¶

False northing, in meters.

Defaults to 0.0.