Converting geo coordinates from degree to decimal

Question

I want to convert my geographic coordinates from degrees to decimals, my data are as follows:

         lat     long
105252 30°25.264 9°01.331
105253 30°39.23         


        

Answer 1

Thanks for answers by @Gord Stephen and @CephBirk. Sure helped me out. I thought I'd just mention that I also found that measurements::conv_unit doesn't deal with "E/W" "N/S" entries, it requires positive/negative degrees. My coordinates comes as character strings "1 1 1W" and needs to first be converted to "-1 1 1".
I thought I'd share my solution for that.

df <- c("1 1 1E", "1 1 1W", "2 2 2N","2 2 2S")  
measurements::conv_unit(df, from = 'deg_min_sec', to = 'dec_deg')
[1] "1.01694444444444" NA                 NA                 NA  
Warning message:
In split(as.numeric(unlist(strsplit(x, " "))) * c(3600, 60, 1),  :
  NAs introduced by coercion

ewns <- ifelse( str_extract(df,"\\(?[EWNS,.]+\\)?") %in% c("E","N"),"+","-")
dms <- str_sub(df,1,str_length(df)-1)
df2 <- paste0(ewns,dms)

df_dec <- measurements::conv_unit(df2, 
                                  from = 'deg_min_sec', 
                                  to = 'dec_deg'))
df_dec
[1] "1.01694444444444"  "-1.01694444444444" "2.03388888888889"  "-2.03388888888889"
as.numeric(df_dec)
[1]  1.016944 -1.016944  2.033889 -2.033889