cf.CoordinateConversion

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class cf.CoordinateConversion(parameters=None, domain_ancillaries=None, source=None, copy=True)

Bases: cfdm.coordinateconversion.CoordinateConversion

A coordinate conversion component of a coordinate reference construct of the CF data model.

A coordinate conversion formula converting coordinate values taken from the dimension or auxiliary coordinate constructs to a different coordinate system. A term of the conversion formula can be a scalar or vector parameter which does not depend on any domain axis constructs, may have units, or may be a descriptive string (such as the projection name “mercator”), or it can be a reference to a domain ancillary construct (such as one containing spatially varying orography data). A coordinate reference construct relates the coordinate values of the field to locations in a planetary reference frame.

New in version 3.0.0.

Initialisation

Parameters

parameters: dict, optional

Set parameters. The dictionary keys are term names, with corresponding parameter values.

Parameters may also be set after initialisation with the set_parameters and set_parameter methods.

Parameter example:

parameters={'earth_radius': 6371007.}

domain_ancillaries: dict, optional

Set references to domain ancillary constructs. The dictionary keys are term names, with corresponding domain ancillary construct keys.

Domain ancillaries may also be set after initialisation with the set_domain_ancillaries and set_domain_ancillary methods.

Parameter example:

domain_ancillaries={'orog': 'domainancillary2'}

source: optional

Convert source, which can be any type of object, to a CoordinateConversion instance.

All other parameters, apart from copy, are ignored and their values are instead inferred from source by assuming that it has the CoordinateConversion API. Any parameters that can not be retrieved from source in this way are assumed to have their default value.

Note that if x is also a CoordinateConversion instance then cf.CoordinateConversion(source=x) is equivalent to x.copy().

copy: bool, optional

If True (the default) then deep copy the input parameters prior to initialisation. By default the parameters are not deep copied.

Parameter terms

Methods

del_parameter	Delete a parameter.
get_parameter	Get a parameter value.
has_parameter	Whether a parameter has been set.
set_parameter	Set a parameter-valued term.
parameters	Return all parameters.
clear_parameters	Remove all parameters.
set_parameters	Set parameters.

Domain ancillary terms

Methods

del_domain_ancillary	Delete a domain ancillary.
get_domain_ancillary	Return a domain ancillary term.
has_domain_ancillary	Whether a domain ancillary has been set.
set_domain_ancillary	Set an domain ancillary-valued term.
domain_ancillaries	Return all domain_ancillaries.
clear_domain_ancillaries	Remove all domain_ancillaries.
set_domain_ancillaries	Set domain_ancillaries.

Miscellaneous

Methods

copy	Return a deep copy.
equals	Whether two instances are the same.

Special

Methods

__bool__	Called by the bool built-in function.
__deepcopy__	Called by the copy.deepcopy function.
cf.CoordinateConversion.__nonzero__
__repr__	Called by the repr built-in function.
__str__	Called by the str built-in function.