this function parses coordinates from DMS to decimal degrees

Usage

dms2dd(x, lat, long, dms)

Arguments

x: an input data frame to apply operations too
lat: a name of the column holding the latitude values
long: a name of the colymn holding the longitude values
dms: are coordinates in degrees minutes seconds? TRUE for yes, FALSE for decimal degrees

Value

data frame(/tibble) with coordinates unambiguously labeled as being in both degrees, minutes, seconds (_dms) and decimal degrees (_dd).

Examples

 coords <- data.frame(
  longitude_dd = runif(15, min = -120, max = -100),
  latitude_dd = runif(15, min = 35, max = 48)
)
coords_formatted <- dms2dd( coords )
head(coords_formatted)
#>    longitude_dd latitude_dd latitude_dms longitude_dms
#>           <num>       <num>       <char>        <char>
#> 1:   -111.63277    43.24169   N 43°14'30   W 111°37'58
#> 2:   -106.62259    46.16266    N 46°9'46   W 106°37'21
#> 3:   -109.84699    42.36963   N 42°22'11   W 109°50'49
#> 4:   -106.79281    38.28896   N 38°17'20   W 106°47'34
#> 5:   -109.76417    46.94444   N 46°56'40   W 109°45'51
#> 6:   -103.28895    46.27555   N 46°16'32   W 103°17'20
colnames(coords_formatted)
#> [1] "longitude_dd"  "latitude_dd"   "latitude_dms"  "longitude_dms"