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
Sinusoidal (Sanson-Flamsteed)

proj-string: +proj=sinu

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>

Central meridian/longitude of natural origin, longitude of origin or longitude of false origin (naming and meaning depend on the projection method).

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, easting at false origin or easting at projection centre (naming and meaning depend on the projection method). Always in meters.

Defaults to 0.0.

+y_0=<value>

False northing, northing at false origin or northing at projection centre (naming and meaning depend on the projection method). Always in meters.

Defaults to 0.0.