Package mapnik :: Class Projection

Class Projection

 object --+    
          |    
??.instance --+
              |
             Projection

Known Subclasses:

_Projection

Represents a map projection.

Instance Methods

__getinitargs__(...)
__getinitargs__( (Projection)arg1) -> tuple :

__init__(...)
__init__( (object)arg1 [, (str)proj4_string]) -> None : Constructs a new projection from its PROJ.4 string representation.

__reduce__(...)
helper for pickle

__repr__(self)
repr(x)

_c___repr__(x)
repr(x)

expanded(...)
expanded( (Projection)arg1) -> str : normalize PROJ.4 definition by expanding +init= syntax

forward(self, obj)
Projects the given object (Box2d or Coord) from the geographic space into the cartesian space.

inverse(self, obj)
Projects the given object (Box2d or Coord) from the cartesian space into the geographic space.

params(...)
params( (Projection)arg1) -> str : Returns the PROJ.4 string for this projection.

Inherited from unreachable.instance: __new__

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __reduce_ex__, __setattr__, __sizeof__, __str__, __subclasshook__

Class Variables
	__instance_size__ = `48`
	__safe_for_unpickling__ = `True`
	_c___module__ = `'mapnik._mapnik'`

Properties
	geographic This property is True if the projection is a geographic projection (i.e.
Inherited from `object`: `__class__`

Method Details

getinitargs(...)


__getinitargs__( (Projection)arg1) -> tuple :

    C++ signature :
        boost::python::tuple __getinitargs__(mapnik::projection)

init(...)
(Constructor)


__init__( (object)arg1 [, (str)proj4_string]) -> None :
    Constructs a new projection from its PROJ.4 string representation.
    
    The parameterless version of this constructor is equivalent to
       Projection('+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs')
    
    The constructor will throw a RuntimeError in case the projection
    cannot be initialized.
    

    C++ signature :
        void __init__(_object* [,std::string])

Overrides: object.__init__

reduce(...)

helper for pickle

Overrides: object.__reduce__: (inherited documentation)

repr(self)
(Representation operator)

repr(x)

Overrides: object.__repr__: (inherited documentation)

expanded(...)


expanded( (Projection)arg1) -> str :
    normalize PROJ.4 definition by expanding +init= syntax
    

    C++ signature :
        std::string expanded(mapnik::projection {lvalue})

forward(self, obj)


Projects the given object (Box2d or Coord) 
from the geographic space into the cartesian space.

See also:
  Box2d.forward(self, projection),
  Coord.forward(self, projection).

inverse(self, obj)


Projects the given object (Box2d or Coord) 
from the cartesian space into the geographic space.

See also:
  Box2d.inverse(self, projection),
  Coord.inverse(self, projection).

params(...)


params( (Projection)arg1) -> str :
    Returns the PROJ.4 string for this projection.
    

    C++ signature :
        std::string params(mapnik::projection {lvalue})

Property Details

geographic

This property is True if the projection is a geographic projection (i.e. it uses lon/lat coordinates)

Get Method:: unreachable(...)