CODEWITHSUNDEEP
rgpsgpx
Alberto
Alberto

Reputation: 93

Error in R function readGPS: gpsbabel not found

I'm trying to download a gpx file from the YOURS routing API (http://wiki.openstreetmap.org/wiki/YOURS#Routing_API) and upload the file to R using the readGPS function contained in the maptools package.

Here is the code:

require(utils)
require(maptools)


URL <- 'http://www.yournavigation.org/api/1.0/saveas.php?type=gpx&data=5.62373%2053.01,5.62359%2053.01014,5.62336%2053.01024,5.62314%2053.010303'

download.file(URL, 'tmpTrip.gpx')
gpx.raw <- readGPS(i='gpx', f='tmpTrip.gpx', type='t')

And the error I receive:

Error in readGPS(i = "gpx", f = "tmpTrip.gpx", type = "t") : 
  gpsbabel not found

I do have installed gpsbabel and I can see the gpx file correctly downloaded in my working directory. My system and R version are: Windows 7 Enterprise Service Pack 1, running on Intel Core i5-3320M CPU @ 2.60GHz, 4GB RAM, 32 bit OS.

R version 3.1.0 (2014-04-10) -- "Spring Dance"
Copyright (C) 2014 The R Foundation for Statistical Computing
Platform: i386-w64-mingw32/i386 (32-bit)

Any help is much appreciated, thank you!!

Upvotes: 1

Views: 937

Answers (3)

dtg37
dtg37

Reputation: 13

For Mac users:

setwd("/Applications/GPSBabelFE.app")

Upvotes: 0

CrunchyTopping
CrunchyTopping

Reputation: 814

If you have GPSBabel installed in your working directory as well, this should work.

For me, I changed the WD:

 setwd("C:/Program Files (x86)/GPSBabel")

And then my code 

 gpx.raw <- readGPS(i = "gpx", f = "C:/Users/Desktop/waypoints.gpx", type="w")

worked after that.

Upvotes: 0

Paul Lemmens
Paul Lemmens

Reputation: 625

Figuring it out the hard way, I found that readGPS() calls Sys.which which is a function that tries to find where a file is located on the system. ?Sys.which doesn't say it that clearly but (at least on Windows) for it to work, you need to add the install path of gpsbabel to your path.

Upvotes: 1

Related Questions