[R-sig-Geo] readOGR problem in Windows

[Michael Sumner]

Try removing the trailing slash from the dsn path.

HTH

On Wed, 24 Dec 2014 06:38 James Rooney <ROONEYJ4 at tcd.ie> wrote:

> Hi Alex,
>
> Doh! I cut and paste the mac version. The windows version that is not
> working looks as below.
> The read.csv's work no problem - but read OGR won't work even with
> absolute paths. So I think it is not related to directory paths unless
> readOGR is someone different in this regard.
> James
> Correct Code:
>
> library(rgdal)
> library(rgeos)
> library(maptools)
> library(RColorBrewer)
> library(classInt)
> library(ggplot2)
> library(INLA)
>
>
> # Set working directory
> #setwd("/Users/james/Project Work/ALS Spatial - Advanced")
> setwd("C:/Users/james/Project Work/ALS Spatial - Advanced")
>
> source("R_Files/Ireland - General Functions/SA.data-prep.functions.R")
>
> # Load soils databse
> soils <- read.csv("Irish Data/Soil Database/NSDB_SA_kriged.csv",
> header=TRUE)
>
> # Load shape files and data file
> SA <- readOGR("./Irish Data/Processed Data/","SA.basic.analysis.
> shapes",TRUE)
> df <- read.csv("./Irish Data/Processed Data/SA.basic.analysis.data.csv",
> header=TRUE)
> SA at data = data.frame(SA at data, df[match(SA at data$SA_CODE, df$SA_CODE),])
>
>
> ________________________________________
> From: Alex Mandel [tech_dev at wildintellect.com]
> Sent: 23 December 2014 16:43
> To: James Rooney; r-sig-geo at r-project.org
> Subject: Re: [R-sig-Geo] readOGR problem in Windows
>
> On 12/23/2014 07:43 AM, James Rooney wrote:
> > Dear List,
> >
> > I have some code I have developed on a Mac that I'm trying to transfer
> onto a higher spec windows 8.1 machine and I am running into a problem with
> the readOGR function in rgdal.
> >
> > My code is below. This works fine under Mac, but under windows readOGR
> gives me the error:
> > "Error in ogrInfo(dsn = dsn, layer = layer, encoding = encoding,
> use_iconv = use_iconv, :
> > Cannot open file "
> >
> > The rgdal version on the Mac is rgdal_0.8-16
> > whilst on Win 8.1 is rgdal 0.9-1
> >
> > The preceding read.csv statement works just fine.
> > Any ideas anyone ?
> > Thanks,
> > James
> >
> >
> > Code:
> >
> > library(rgdal)
> > library(rgeos)
> > library(maptools)
> > library(RColorBrewer)
> > library(classInt)
> > library(ggplot2)
> > library(INLA)
> >
> >
> > # Set working directory
> > setwd("/Users/james/Project Work")
> >
> ^^ Pretty sure this line would fail on windows, so your code won't be
> running in the correct directory when it gets to the readOGR later.
> Windows absolute paths start with a drive letter.
>
> > source("R_Files/Ireland - General Functions/SA.data-prep.functions.R")
> >
> > # Load soils databse
> > soils <- read.csv("Irish Data/NSDB_SA_kriged.csv", header=TRUE)
> >
> Though you say this one works? odd?
>
> > # Load shape files and data file
> > SA <- readOGR("./Irish Data/Processed Data/","SA.basic.analysis.
> shapes",TRUE)
> >
> No idea what Windows does with ./
>
> Overall I think you need to verify the path that R is on, and that it
> can actually see the files before it tries to load them.
>
> Thanks,
> Alex
>
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