A line feature may be created with either 2-dimensional or 3-dimensional
points, based on what is provided by the argument *array3* in **LineAPI.createLine**.
If array3 is an empty string, i.e. "", the points are
2-dimensional. Otherwise, *array3* must contain a comma-separated
list of z-values or time values. The list must be the same length as the *xArray*
and *yArray* arguments.

If *array3* contains z-values, they must be in meters, with positive
values for elevations above sea level and negative values for depths below sea
level. If *array3* contains time values, they must be in seconds,
relative to the system’s standard time base.