如何从城市名称和邮政编码中获取经纬度数据

Question

I am looking for a way to get latitude and longitude coordinates form an indian zip code in R.

My data frame looks like:

Area       Zip   
Mumbai    410710
Mumbai    400083
Mumbai    400034
Mumbai    400612

Looking to get:

Area       Zip         Latitude     Longitude
Mumbai    410710        ...           ...
Mumbai    400083
Mumbai    400034
Mumbai    400612

Answer 1

You can use ggmap::geocode .

library(ggmap)    

zip <- read.table(text = "Area       Zip   
    Mumbai    410710
    Mumbai    400083
    Mumbai    400034
    Mumbai    400612", header = T)

gc <- do.call(rbind,
        apply(zip, 1, function(x){geocode(location = paste(x[2], x[1], sep = ", "), 
                                          source = "google")})
        )
cbind(zip, gc)
#     Area    Zip      lon      lat
# 1 Mumbai 410710 72.87766 19.07598
# 2 Mumbai 400083 72.93742 19.11662
# 3 Mumbai 400034 72.81482 18.97242
# 4 Mumbai 400612 73.02872 19.17993

However, sometimes the Google API seems to return NA for no reason. Therefore, you might have to loop through it until no NA is contained anymore.
Or use source = "dsk" . However, the datasciencetoolkit might not have long lat for all these zip codes.