# cf.DimensionCoordinate.X¶

DimensionCoordinate.X

True if and only if the data are coordinates for a CF ‘X’ axis.

CF ‘X’ axis coordinates are defined by having one or more of the following:

• The axis property has the value 'X'
• Units of longitude
• The standard_name property is one of 'longitude', 'projection_x_coordinate' or 'grid_longitude'

Examples:

>>> c.Units
<CF Units: degreeE>
>>> c.X
True

>>> c.standard_name
'longitude'
>>> c.X
True

>>> c.axis == 'X' and c.X
True