[R] help_ReverseGeocoding

[MacQueen, Don]

My first guess, after a quick glance, is that Google only lets you do a
limited number of lookups within some period of time.

-Don

-- 
Don MacQueen

Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062





On 7/27/15, 10:14 PM, "R-help on behalf of shreya ghosh"
<r-help-bounces at r-project.org on behalf of shreya.cst at gmail.com> wrote:

>Hi,
>I'm trying to do reversegeocoding on a large dataset. I'm using "RJSONIO"
>library and using Google map API to get the location of the given lat-lon
>in the dataset. After 100 or 150 successful displaying location
>information
>it is showing
> Warning message - "In readLines(con) : cannot open: HTTP status was '0
>(null)'"
>and Error : "Error in fromJSON(paste(readLines(con), collapse = "")) :
>  error in evaluating the argument 'content' in selecting a method for
>function 'fromJSON': Error in readLines(con) : cannot open the connection"
>
>Please help me to solve the issue.
>
>location function is as follows :
>
>location<-function(latlng){
> latlngStr <-  gsub(' ','%20', paste(latlng, collapse=","))
>  library("RJSONIO") #Load Library
>  #Open Connection
>  connectStr <- paste('
>http://maps.google.com/maps/api/geocode/json?sensor=false&latlng=',latlngS
>tr,
>sep="")
>  con <- url(connectStr)
>  data.json <- fromJSON(paste(readLines(con), collapse=""))
>  close(con)
>
>  data.json <- unlist(data.json)
>  if(data.json["status"]=="OK")
>    address <- data.json["results.formatted_address"]
>  print (address)
>}
>
>I'm using R version 3.2.1 and Ubuntu 14.10 OS.
>
>Thank you.
>
>
>
>-- 
>
>Shreya Ghosh
>
>*9007448845*
>
>-- The mind is not a vessel to be filled, but a fire to be kindled
>
>	[[alternative HTML version deleted]]
>
>______________________________________________
>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.