cfdm.Field.node_coordinates

Field.node_coordinates(persist=False)

Create the node coordinates for a UGRID mesh topology.

For face and edge cells, the nodes are the cell vertices. For point cells, the nodes are the same points.

Added in version (cfdm): 1.13.1.0

See also

(cfdm) domain_topology

Parameters:

persist: bool, optional

If True then persist into memory the data of the returned node coordinates. If False (the default) then don’t do this.

Returns:

list

The node coordinates, stored in zero or more cfdm.AuxiliaryCoordinate contructs.

Examples:

Face cells:

>>> f = cfdm.example_field(8)
>>> print(f)
Field: air_temperature (ncvar%ta)
---------------------------------
Data            : air_temperature(time(2), ncdim%nMesh2_face(3)) K
Cell methods    : time(2): point (interval: 3600 s)
Dimension coords: time(2) = [2016-01-02 01:00:00, 2016-01-02 11:00:00] gregorian
Auxiliary coords: longitude(ncdim%nMesh2_face(3)) = [-44.0, -44.0, -42.0] degrees_east
                : latitude(ncdim%nMesh2_face(3)) = [34.0, 32.0, 34.0] degrees_north
Topologies      : cell:face(ncdim%nMesh2_face(3), 4) = [[2, ..., --]]
Connectivities  : connectivity:edge(ncdim%nMesh2_face(3), 5) = [[0, ..., --]]
>>> f.node_coordinates()
[<AuxiliaryCoordinate: longitude(7) degrees_east>,
 <AuxiliaryCoordinate: latitude(7) degrees_north>]

Point cells:

>>> f = cfdm.example_field(10)
>>> print(f)
Field: air_pressure (ncvar%pa)
------------------------------
Data            : air_pressure(time(2), ncdim%nMesh2_node(7)) hPa
Cell methods    : time(2): point (interval: 3600 s)
Dimension coords: time(2) = [2016-01-02 01:00:00, 2016-01-02 11:00:00] gregorian
Auxiliary coords: longitude(ncdim%nMesh2_node(7)) = [-45.0, ..., -40.0] degrees_east
                : latitude(ncdim%nMesh2_node(7)) = [35.0, ..., 34.0] degrees_north
Topologies      : cell:point(ncdim%nMesh2_node(7), 5) = [[0, ..., --]]
>>> f.node_coordinates()
[<AuxiliaryCoordinate: longitude(7) degrees_east>,
 <AuxiliaryCoordinate: latitude(7) degrees_north>]