Tilted Perspective is similar to 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.
Classification: Azimuthal
Available forms: Forward and inverse, spherical projection
Defined area: Global
Alias: tpers
Domain: 2D
Input type: Geodetic coordinates
Output type: Projected coordinates
Projection String
+proj=tpers +h=5500000 +lat_0=40
Required Parameters
+h: Height of the perspective view.
+lat_0: Latitude of the projection center.
+lon_0: Longitude of the projection center.
Optional Parameters
+azi=<value>: Bearing in degrees away from north. Defaults to 0.0.
+tilt=<value>: Angle in degrees away from nadir. Defaults to 0.0.
Tilted Perspective
Tilted Perspective is similar to
nsperin that it simulates a perspective view from a height. Wherensperprojects 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 beyondnsper'sh. As withnsper,lat_0&lon_0are also required for satellite position.Classification: Azimuthal
Available forms: Forward and inverse, spherical projection
Defined area: Global
Alias: tpers
Domain: 2D
Input type: Geodetic coordinates
Output type: Projected coordinates
Projection String
Required Parameters
+h: Height of the perspective view.+lat_0: Latitude of the projection center.+lon_0: Longitude of the projection center.Optional Parameters
+azi=<value>: Bearing in degrees away from north. Defaults to 0.0.+tilt=<value>: Angle in degrees away from nadir. Defaults to 0.0.