Geometry: The geometry field for which you want to return X coordinate.
MeasType: The active reference space (TrueMeas or ProjectedMeas) used for performing measurements.
UnitOfMeasure: The angular (if MeasType is TrueMeas) or linear (if MeasType is ProjectedMeas) unit in which the geometry is to be measured.
To calculate projected value of X: X(Input.Geometry, ProjectedMeas, Meter)
To calculate longitude in Degrees: X(Input.Geometry, TrueMeas, Degree)
The coordinate is returned only for PointGeometry, OrientedPointGeometry and TextPointGeometry. For other geometries this function returns a NULL value.
If the geometry is not defined (NULL value), the NULL value is returned.
Note: When using the X or Y functions with the Unit of Measure set to DegreesMinutesSeconds, the output will be seconds expressed to double precision. Example: X(input.geometry,TrueMeas,DegreesMinutesSeconds) outputs seconds.nnnnnn. The same holds true for the format of dd.mmssss. See how to convert to DD:MMS format.