Polar Stereographic Projection. More...
#include <GeographicLib/PolarStereographic.hpp>
Public Member Functions | |
| PolarStereographic (double a, double invf, double k0) throw () | |
| void | Forward (bool northp, double lat, double lon, double &x, double &y, double &gamma, double &k) const throw () |
| void | Reverse (bool northp, double x, double y, double &lat, double &lon, double &gamma, double &k) const throw () |
Static Public Attributes | |
| static const PolarStereographic | UPS |
Polar Stereographic Projection.
Implementation taken from the report,
This is a straightforward implementation of the equations in Snyder except that Newton's method is used to invert the projection.
| GeographicLib::PolarStereographic::PolarStereographic | ( | double | a, |
| double | invf, | ||
| double | k0 | ||
| ) | throw () |
Constructor for a ellipsoid radius a (meters), inverse flattening invf, and central scale factor k0. Setting invf <= 0 implies invf = inf or flattening = 0 (i.e., a sphere).
Definition at line 22 of file PolarStereographic.cpp.
| void GeographicLib::PolarStereographic::Forward | ( | bool | northp, |
| double | lat, | ||
| double | lon, | ||
| double & | x, | ||
| double & | y, | ||
| double & | gamma, | ||
| double & | k | ||
| ) | const throw () |
Convert from latitude lat (degrees) and longitude lon (degrees) to polar stereographic easting x (meters) and northing y (meters). The projection is about the pole given by northp (false means south, true means north). Also return the meridian convergence gamma (degrees) and the scale k. No false easting or northing is added. lat should be in the range (-90, 90] for northp = true and in the range [-90, 90) for northp = false; lon should be in the range [-180, 360].
Definition at line 38 of file PolarStereographic.cpp.
References GeographicLib::Constants::degree().
Referenced by GeographicLib::UTMUPS::Forward().
| void GeographicLib::PolarStereographic::Reverse | ( | bool | northp, |
| double | x, | ||
| double | y, | ||
| double & | lat, | ||
| double & | lon, | ||
| double & | gamma, | ||
| double & | k | ||
| ) | const throw () |
Convert from polar stereogrphic easting x (meters) and northing y (meters) to latitude lat (degrees) and longitude lon (degrees) . The hemisphere is given by northp (false means south, true means north). Also return the meridian convergence gamma (degrees) and the scale k. No false easting or northing is added. The value of lon returned is in the range [-180, 180).
Definition at line 58 of file PolarStereographic.cpp.
References GeographicLib::Constants::pi(), and GeographicLib::Constants::degree().
Referenced by GeographicLib::UTMUPS::Reverse().
const PolarStereographic GeographicLib::PolarStereographic::UPS [static] |
A global instantiation of PolarStereographic with the WGS84 ellipsoid and the UPS scale factor. However, unlike UPS, no false easting or northing is added.
Definition at line 80 of file PolarStereographic.hpp.
1.7.5