Near-sided perspective¶
The near-sided perspective projection simulates a view from a height \(h\) similar to how a satellite in orbit would see it.
Classification |
Azimuthal. Neither conformal nor equal area. |
Available forms |
Forward and inverse spherical projection |
Defined area |
Global, although for one hemisphere at a time. |
Alias |
nsper |
Domain |
2D |
Input type |
Geodetic coordinates |
Output type |
Projected coordinates |
proj-string: +proj=nsper +h=3000000 +lat_0=-20 +lon_0=145¶
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¶
- +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,+Rtakes 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.