help_ReverseGeocoding

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]]

You should use ggmap::revgeocode (it calls google's api) and google
will rate-limit you. There are also packages to use HERE maps
geo/revgeo lookups

http://blog.corynissen.com/2014/10/making-r-package-to-use-here-geocode-api.html
and the geocode package has GNfindNearestAddress, so tons of options
to choose from.

On Tue, Jul 28, 2015 at 11:30 AM, MacQueen, Don <macqueen1 at llnl.gov>
wrote:

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]]