localize_to_time_zone uses Google Maps Time Zone APIs to localize the
time zone in an
act_tbl. This modifies a mutated
act_tbl with the time column updated to contain the same
absolute time, but with the appropriate time zone for where the activity took
Note that to avoid overuse of the APIs, this does an "approximation", in that it finds the correct time zone for the first point in the data frame, and assumes all points in that data frame use that time zone. Runs between time zones (or runs that cross daylight savings time shifts) will hence be recorded using a consistent, but not always pointwise correct, timezone.
Note that you must have previously called
register an API key before calling this.
act_tbl, but with the
updated to be in the local time zone rather than UTC.
## Not run: example_gpx_file <- system.file( "extdata", "running_example.gpx.gz", package = "activatr" ) act_tbl <- parse_gpx(example_gpx_file) act_tbl_with_tz <- localize_to_time_zone(act_tbl) ## End(Not run)
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