Oblique Stereographic Alternative
Classification |
Azimuthal |
Available forms |
Forward and inverse, spherical and ellipsoidal |
Defined area |
Global |
Alias |
sterea |
Domain |
2D |
Input type |
Geodetic coordinates |
Output type |
Projected coordinates |
Note
This projection method, referenced by EPSG as "Oblique Stereographic", is for example used for the Netherlands "Amersfoort / RD New" projected CRS. It gives different results than the Stereographic method in the non-polar cases (i.e. the oblique and equatorial case).
Parameters
Note
All parameters are optional for the 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.
- +lat_0=<value>
Latitude of natural origin, latitude of false origin or latitude of projection centre (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: +lat_0=1.570796r
See Projection Units for more information.
- +ellps=<value>
The name of a built-in ellipsoid definition.
See Ellipsoids for more information, or execute
proj -le
for a list of built-in ellipsoid names.Defaults to "GRS80".
- +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.
- +k_0=<value>
Scale factor. Determines scale factor used in the projection.
Defaults to 1.0.