lutz: tz_lookup_coords – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

tz_lookup_coords

Lookup time zones of lat/long pairs

Description

There are two methods - "fast", and "accurate". The "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".

Usage

tz_lookup_coords(lat, lon, method = "fast", warn = TRUE)

Arguments

`lat`	numeric vector of latitudes
`lon`	numeric vector of longitudes the same length as `x`
`method`	method by which to do the lookup. Either `"fast"` (default) or `"accurate"`.
`warn`	By default, if `method = "fast"` a warning is issued about the potential for inaccurate results. Set `warn` to `FALSE` to turn this off.

Value

character vector the same length as x and y specifying the time zone of the points.

Examples

tz_lookup_coords(42, -123)
tz_lookup_coords(lat = c(48.9, 38.5, 63.1, -25), lon = c(-123.5, -110.2, -95.0, 130))

lutz

Look Up Time Zones of Point Coordinates

v0.3.1

MIT + file LICENSE

Authors

Andy Teucher [aut, cre] (<https://orcid.org/0000-0002-7840-692X>), Bob Rudis [ctb] (<https://orcid.org/0000-0001-5670-2640>)

Initial release