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 |
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.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.