cfdm.DimensionCoordinate


class cfdm.DimensionCoordinate(properties=None, data=None, bounds=None, geometry=None, interior_ring=None, source=None, copy=True, _use_data=True)[source]

Bases: cfdm.mixin.netcdf.NetCDFVariable, cfdm.mixin.coordinate.Coordinate, cfdm.core.dimensioncoordinate.DimensionCoordinate

A dimension coordinate construct of the CF data model.

A dimension coordinate construct provides information which locate the cells of the domain and which depend on a subset of the domain axis constructs. The dimension coordinate construct is able to unambiguously describe cell locations because a domain axis can be associated with at most one dimension coordinate construct, whose data array values must all be non-missing and strictly monotonically increasing or decreasing. They must also all be of the same numeric data type. If cell bounds are provided, then each cell must have exactly two vertices. CF-netCDF coordinate variables and numeric scalar coordinate variables correspond to dimension coordinate constructs.

The dimension coordinate construct consists of a data array of the coordinate values which spans a subset of the domain axis constructs, an optional array of cell bounds recording the extents of each cell (stored in a Bounds object), and properties to describe the coordinates. An array of cell bounds spans the same domain axes as its coordinate array, with the addition of an extra dimension whose size is that of the number of vertices of each cell. This extra dimension does not correspond to a domain axis construct since it does not relate to an independent axis of the domain. Note that, for climatological time axes, the bounds are interpreted in a special way indicated by the cell method constructs.

NetCDF interface

The netCDF variable name may be accessed with the nc_set_variable, nc_get_variable, nc_del_variable and nc_has_variable methods.

The netCDF variable group structure may be accessed with the nc_set_variable, nc_get_variable, nc_variable_groups, nc_clear_variable_groups and nc_set_variable_groups methods.

New in version (cfdm): 1.7.0

Initialisation

Parameters
properties: dict, optional

Set descriptive properties. The dictionary keys are property names, with corresponding values. Ignored if the source parameter is set.

Properties may also be set after initialisation with the set_properties and set_property methods.

Parameter example:

properties={'standard_name': 'time'}

data: data_like, optional

Set the data. Ignored if the source parameter is set.

A data_like object is any object that can be converted to a Data object, i.e. numpy array_like objects, Data objects, and cfdm instances that contain Data objects.

The data also may be set after initialisation with the set_data method.

bounds: Bounds, optional

Set the bounds array. Ignored if the source parameter is set.

The bounds array may also be set after initialisation with the set_bounds method.

geometry: str, optional

Set the geometry type. Ignored if the source parameter is set.

The geometry type may also be set after initialisation with the set_geometry method.

Parameter example:

geometry='polygon'

interior_ring: InteriorRing, optional

Set the interior ring variable. Ignored if the source parameter is set.

The interior ring variable may also be set after initialisation with the set_interior_ring method.

source: optional

Initialise the properties, data and bounds from those of source.

Note that if source is a DimensionCoordinate instance then cfdm.DimensionCoordinate(source=source) is equivalent to source.copy().

copy: bool, optional

If False then do not deep copy input parameters prior to initialisation. By default arguments are deep copied.

Inspection

Methods

dump

A full description of the dimension coordinate construct.

identity

Return the canonical identity.

identities

Return all possible identities.

Attributes

construct_type

Return a description of the construct type.

Properties

Methods

del_property

Remove a property.

get_property

Return a property.

has_property

Whether a property has been set.

set_property

Set a property.

properties

Return all properties.

clear_properties

Remove all properties.

set_properties

Set properties.

Data

Methods

apply_masking

Apply masking as defined by the CF conventions.

del_data

Remove the data.

get_data

Return the data.

has_data

Whether or not the construct has data.

set_data

Set the data.

insert_dimension

Expand the shape of the data array.

squeeze

Remove size one axes from the data array.

transpose

Permute the axes of the data array.

Attributes

data

Return the data.

dtype

Data-type of the data elements.

ndim

The number of dimensions in the data array.

shape

A tuple of the data array’s dimension sizes.

size

The number of elements in the data array.

Bounds

Methods

del_bounds

Remove the bounds.

get_bounds

Return the bounds.

has_bounds

Whether or not there are bounds.

set_bounds

Set the bounds.

get_bounds_data

Return the bounds data.

Attributes

bounds

Return the bounds.

Geometries

Methods

del_geometry

Remove the geometry type.

get_geometry

Return the geometry type.

has_geometry

True if there is a geometry type.

set_geometry

Set the geometry type.

del_interior_ring

Remove the geometry type.

get_interior_ring

Return the interior ring variable for polygon geometries.

has_interior_ring

Whether or not there is an interior ring variable.

set_interior_ring

Set the interior_ring.

del_node_count

Remove the node count variable for geometry bounds.

get_node_count

Return the node count variable for geometry bounds.

has_node_count

Whether geometry bounds have a node count variable.

set_node_count

Set the node count variable for geometry bounds.

del_part_node_count

Remove the part node count variable for geometry bounds.

get_part_node_count

Return the part node count variable for geometry bounds.

has_part_node_count

Whether geometry bounds have a part node count variable.

set_part_node_count

Set the part node count variable for geometry bounds.

Attributes

interior_ring

Return the interior ring variable for polygon geometries.

Climatology

Methods

del_climatology

Remove the climatology setting.

get_climatology

Return the climatology setting.

is_climatology

True if the coordinates are climatological.

set_climatology

Set whether or not coordinates are climatological.

Miscellaneous

Methods

copy

Return a deep copy.

creation_commands

Return the commands that would create the construct.

equals

Whether two instances are the same.

uncompress

Uncompress the construct.

get_filenames

Return the name of the file or files containing the data.

NetCDF

Methods

nc_del_variable

Remove the netCDF variable name.

nc_get_variable

Return the netCDF variable name.

nc_has_variable

Whether the netCDF variable name has been set.

nc_set_variable

Set the netCDF variable name.

Groups

Methods

nc_variable_groups

Return the netCDF variable group hierarchy.

nc_clear_variable_groups

Remove the netCDF variable group hierarchy.

nc_set_variable_groups

Set the netCDF variable group hierarchy.

Special

Methods

__deepcopy__

Called by the copy.deepcopy function.

__getitem__

Return a subspace of the construct defined by indices.

__repr__

Called by the repr built-in function.

__str__

Called by the str built-in function.

Docstring substitutions

Methods

_docstring_special_substitutions

Return the special docstring substitutions.

_docstring_substitutions

Returns the substitutions that apply to methods of the class.

_docstring_package_depth

Returns the class {{package}} substitutions package depth.

_docstring_method_exclusions

Returns method names excluded in the class substitutions.