Convert from degrees, minutes, and seconds to decimal degrees

Convert latitudes and longitudes from degrees, minutes, and seconds to decimal degrees for conversion to spatial objects.

dms2dd(lon, lat)

Arguments

lon

a character vector of longitude coordinates in degrees, minutes, and seconds; see details

lat

a character vector of latitude coordinates in degrees, minutes, and seconds; see details

Value

An \(n * 2\) matrix where n is the length of lon and lat.

Details

lon and lat are expected to be in the format "degrees° minutes' seconds" (direction)" where direction is optional. If direction is not present, dms2dd will use negative signs (-) to determine positioning of coordinates.

Examples

ll <- data.frame(lon = c("-122° 19' 55\"",
                         "71° 3' 32\" W"),
                 lat = c("47° 36' 22\"",
                         "42° 21' 36\" N"),
                 stringsAsFactors = FALSE)
dms2dd(ll[, 'lon'], ll[, 'lat'])
#>          lon      lat
#> 1 -121.66806 47.60611
#> 2  -71.05889 42.36000