Tilted perspective¶

Classification	Azimuthal
Available forms	Forward and inverse, spherical projection
Defined area	Global
Alias	tpers
Domain	2D
Input type	Geodetic coordinates
Output type	Projected coordinates

proj-string: +proj=tpers +h=5500000 +lat_0=40¶

Tilted Perspective is similar to Near-sided perspective (nsper) in that it simulates a perspective view from a height. Where nsper projects onto a plane tangent to the surface, Tilted Perspective orients the plane towards the direction of the view. Thus, extra parameters specifying azimuth and tilt are required beyond nsper`’s h. As with nsper, lat_0 & lon_0 are also required for satellite position.

Parameters¶

Required¶

+h=<value>¶: Height of the view point above the Earth and must be in the same units as the radius of the sphere or semimajor axis of the ellipsoid.

Optional¶

+azi=<value>¶

Bearing in degrees away from north.

Defaults to 0.0.

+tilt=<value>¶

Angle in degrees away from nadir.

Defaults to 0.0.

+lon_0=<value>¶

Longitude of projection center.

Defaults to 0.0.

+lat_0=<value>¶

Latitude 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.

+x_0=<value>¶

False easting.

Defaults to 0.0.

+y_0=<value>¶

False northing.

Defaults to 0.0.