[R-sig-Geo] Error in reading shape file with readOGR()

[Amos Thairu]

That works!
It seems that readOGR() does not expand the ~ and thus requires the full
expanded path.
Thanks!

On 27 January 2015 at 17:13, Frede Aakmann Tøgersen <frtog at vestas.com>
wrote:

> Hi Amos
>
> Some time ago since I have used readOGR() but I vaguely remember that
> readOGR() does not expand the ~ as e.g. list.files does. You need to give
> the full expanded path like something like this:
>
> "/home/my_username/datasets/mapping"
>
> which of course depends on the system setup (I'm guessing you are on a
> unix-alike system based on the path to gdal installation). Cannot remember
> if a relative path works.
>
>
> Yours sincerely / Med venlig hilsen
>
>
> Frede Aakmann Tøgersen
> Specialist, M.Sc., Ph.D.
> Plant Performance & Modeling
>
> Technology & Service Solutions
> T +45 9730 5135
> M +45 2547 6050
> frtog at vestas.com
> http://www.vestas.com
>
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>
>
> > -----Original Message-----
> > From: R-sig-Geo [mailto:r-sig-geo-bounces at r-project.org] On Behalf Of
> > Amos Thairu
> > Sent: 27. januar 2015 14:50
> > To: r-sig-geo at r-project.org
> > Subject: [R-sig-Geo] Error in reading shape file with readOGR()
> >
> > I am trying to import a shapefile using readOGR below:
> > > dataProjected <- readOGR(dsn="~/datasets/mapping", layer="locations")
> >
> > But I am facing the following error:
> > Error in ogrInfo(dsn = dsn, layer = layer, encoding = encoding,
> use_iconv =
> > use_iconv,  :
> >   Cannot open file
> >
> > I have successfully loaded the same shapefile using readOGR in my windows
> > platform but cannot read that same file
> > using the same command in a linux platform. I guess the problem seems to
> > be
> > related to having uploaded the
> > .shp and its associated files from a Windows machine onto the linux
> > platform.
> >
> > The directory with the shape file is complete with the associated files
> as
> > shown below:
> > > list.files("~/datasets/mapping")
> > [1] "locations-c.dta"   "locations-d.dta"   "locations.dbf"
> > "locations.prj"     "locations.sbn"
> > [6] "locations.sbx"     "locations.shp"     "locations.shp.xml"
> > "locations.shx"
> >
> > I get the following package startup message:
> > > library(rgdal)
> > Loading required package: sp
> > rgdal: version: 0.9-1, (SVN revision 518)
> > Geospatial Data Abstraction Library extensions to R successfully loaded
> > Loaded GDAL runtime: GDAL 1.7.3, released 2010/11/10
> > Path to GDAL shared files: /usr/share/gdal
> > GDAL does not use iconv for recoding strings.
> > Loaded PROJ.4 runtime: Rel. 4.7.1, 23 September 2009, [PJ_VERSION: 470]
> > Path to PROJ.4 shared files: (autodetected)
> >
> > My session info is as follows:
> > > sessionInfo()
> > R version 3.1.2 (2014-10-31)
> > Platform: x86_64-redhat-linux-gnu (64-bit)
> >
> > locale:
> > [1] C
> >
> > attached base packages:
> > [1] stats     graphics  grDevices utils     datasets  methods   base
> >
> > other attached packages:
> > [1] rgdal_0.9-1 sp_1.0-17
> >
> > loaded via a namespace (and not attached):
> > [1] grid_3.1.2      lattice_0.20-29 tools_3.1.2
> >
> > Does anyone know why this is happening? Any assistance would be greatly
> > appreciated.
> >
> > --
> > Regards,
> > Amos Mbugua.
> >
> >       [[alternative HTML version deleted]]
> >
> > _______________________________________________
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> > R-sig-Geo at r-project.org
> > https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>



-- 
Regards,
Amos Mbugua.

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