reducer.or function outputs the result of the logical operator
OR for each tick value of Geo Time Series™ which are in the same equivalence class.
The location and elevation returned are the first one encountered, which may vary depending on the order of the parameters.
reducer.or function can be applied to values of any type, when not applied to BOOLEAN types, the current value is considered to be false.
The standard version of this reducer,
reducer.or, will return
null for any tick where one or more GTS have
null values. The exclude null version,
reducer.or.exclude-nulls, will exclude all
null values when computing the OR.