There are two methods -
"fast" version can
look up many thousands of points very quickly, however when a point is near
a time zone boundary and not near a populated centre, it may return the
incorrect time zone. If accuracy is more important than speed, use
method = "accurate".
the coordinate reference system: integer with the EPSG code, or character with proj4string.
If not specified (i.e.,
method by which to do the lookup. Either
By default, if
Note that there are some regions in the world where a single point can land in
two different overlapping time zones. The
"accurate" method includes these,
and when they are encountered they are concatenated in a single string,
separated by a semicolon.
The data used in the
"fast" method does not include overlapping time zones
at this time.
character vector the same length as
x specifying the time zone of the points.
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