Parse longitude values

parse_lon(lon, format = NULL)

Arguments

lon

(numeric/integer/character) one or more longitude values

format

(character) format, default often works

Value

numeric vector

Errors

Throws warnings on parsing errors, and returns NaN in each case

Types of errors:

Examples

parse_lon("")
#> [1] NaN
if (FALSE) { parse_lon("-181") parse_lon("-361") parse_lon("95") parse_lon("asdfaf") parse_lon("45") parse_lon("-45") parse_lon("-45.2323") parse_lon("334") # out of range with std::stod? parse_lon("-45.23232e24") parse_lon("-45.23232e2") parse_lon("-45.23232") # numeric input parse_lon(1:10) parse_lon(85:94) # different formats parse_lon("40.4183318 E") parse_lon("40.4183318 W") parse_lon("40 25 5.994") # => 40.41833 parse_lon("40.4183318W") parse_lon("W40.4183318") parse_lon("E40.4183318") parse_lon("40.4183318E") parse_lon("E 39 21.440") # => 39.35733 parse_lon("W 56 1.389") # => -56.02315 parse_lon("E40°25’5.994") # => 40.41833 parse_lon("40° 25´ 5.994\" E") # => 40.41833 parse_lon("40:25:6E") parse_lon("40:25:5.994E") parse_lon("40d 25’ 6\" E") }