Package pygeodesy :: Module datums :: Class Transform

Class Transform

  object --+            
           |            
named._Named --+        
               |        
named._NamedBase --+    
                   |    
named._NamedEnumItem --+
                       |
                      Transform

Known Subclasses:

trf.TransformXform

Helmert datum transformation.

See Also: TransformXform.

Instance Methods

__init__(self, name='', tx=0, ty=0, tz=0, s=0, sx=0, sy=0, sz=0)
New Transform.

__eq__(self, other)
Compare this and an other transform.

__hash__(self)
hash(x)

__iter__(self)
Yield the initial attribute values, in order.

__matmul__(self, point)
Transform an ellipsoidal point with this Helmert.

__neg__(self)

inverse(self, name='')
Return the inverse of this transform.

items(self, inverse=False)
Yield the initial attributes, each as 2-tuple (name, value).

toStr(self, prec=5, fmt='g', name='', **unused)
Return this transform as a string.

transform(self, x, y, z, inverse=False, **Vector_and_kwds)
Transform a (cartesian) position, forward or inverse.

Inherited from named._NamedEnumItem: unregister

Inherited from named._NamedBase: __repr__, __str__, others, toRepr

Inherited from named._Named: __imatmul__, __rmatmul__, attrs, classof, copy, dup, methodname, rename, toStr2

Inherited from object: __delattr__, __format__, __getattribute__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __subclasshook__

Class Variables
	tx = `0.0`
	ty = `0.0`
	tz = `0.0`
	rx = `0.0`
	ry = `0.0`
	rz = `0.0`
	s = `0.0`
	s1 = `1.0`
	sx = `0.0`
	sy = `0.0`
	sz = `0.0`

Properties

isunity
Is this a unity, identity transform (bool), like WGS84 with translation, scale and rotation all zero?

Inherited from named._NamedEnumItem: name

Inherited from named._Named: classname, classnaming, iteration, named, named2, named3, named4, sizeof

Inherited from object: __class__

Method Details

init (self, name='', tx=0, ty=0, tz=0, s=0, sx=0, sy=0, sz=0)
(Constructor)

New Transform.

Arguments:

name - Optional, unique name (str).
tx - X translation (meter).
ty - Y translation (meter).
tz - Z translation (meter).
s - Scale (float), ppm.
sx - X rotation (arc-seconds).
sy - Y rotation (arc-seconds).
sz - Z rotation (arc-seconds).

Raises:

NameError - Transform with that name already exists.

Overrides: object.__init__

eq (self, other)
(Equality operator)

Compare this and an other transform.

Arguments:

other - The other transform (Transform).

Returns:

True if equal, False otherwise.

hash (self)
(Hashing function)

hash(x)

Overrides: object.__hash__: (inherited documentation)

matmul (self, point)

Transform an ellipsoidal point with this Helmert.

Returns:

A transformed copy of point.

Raises:

TypeError - Invalid point.

Overrides: named._Named.__matmul__

See Also: Method point.toTransform.

inverse (self, name='')

Return the inverse of this transform.

Arguments:

name - Optional, unique name (str).

Returns:

Inverse (Transform), unregistered.

items (self, inverse=False)

Yield the initial attributes, each as 2-tuple (name, value).

Arguments:

inverse - If True, negate the values (bool).

toStr (self, prec=5, fmt='g', name='', **unused)

Return this transform as a string.

Arguments:

prec - Number of (decimal) digits, unstripped (int).
fmt - Optional float format (letter).
name - Override name (str) or None to exclude this transform's name.

Returns:

Transform attributes (str).

Overrides: named._Named.toStr

transform (self, x, y, z, inverse=False, **Vector_and_kwds)

Transform a (cartesian) position, forward or inverse.

Arguments:

x - X coordinate (meter).
y - Y coordinate (meter).
z - Z coordinate (meter).
inverse - If True, apply the inverse transform (bool).
Vector_and_kwds - An optional, (3-D) Vector=None or cartesian class and additional Vector keyword arguments to return the transformed position.

Returns:

The transformed position (Vector3Tuple(x, y, z)) unless some Vector_and_kwds are specified.

Property Details

isunity

Is this a unity, identity transform (bool), like WGS84 with translation, scale and rotation all zero?

Get method:: isunity(self) - Is this a unity, identity transform (bool), like WGS84 with translation, scale and rotation all zero?
Set method:: _fset_error(inst, val) - Throws an AttributeError, always.
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.

Class Transform

__init__ (self, name='', tx=0, ty=0, tz=0, s=0, sx=0, sy=0, sz=0) (Constructor)

__eq__ (self, other) (Equality operator)

__hash__ (self) (Hashing function)

__matmul__ (self, point)

inverse (self, name='')

items (self, inverse=False)

toStr (self, prec=5, fmt='g', name='', **unused)

transform (self, x, y, z, inverse=False, **Vector_and_kwds)

isunity

init (self, name='', tx=0, ty=0, tz=0, s=0, sx=0, sy=0, sz=0)
(Constructor)

eq (self, other)
(Equality operator)

hash (self)
(Hashing function)

matmul (self, point)