issue with readOGR

On Sat, 9 Nov 2019, Abdoulaye Sarr wrote:

Platform is osx.

Thanks

On Sat, Nov 9, 2019 at 6:11 PM Abdoulaye Sarr <abdoulayesar at gmail.com>
wrote:

output from list.files:

     "dhaka_div.shx"        "dhaka_gazipur.cpg"
 "dhaka_gazipur.dbf"    "dhaka_gazipur.prj"    "dhaka_gazipur.qpj"
 "dhaka_gazipur.shp"
 "dhaka_gazipur.shx"    "dhaka.dbf"            "dhaka.prj"
 "dhaka.shp"
"dhaka.shx"            "indicator.csv"        "r_val.csv"

From this we see that "indicator.csv" is not (immediately) a file that has
an appropriate driver (it needs a *.vrt to say which columns are which,
see https://gdal.org/drivers/vector/csv.html). Valid layers should be
"dhaka" and "dhaka_gazipur", but not "dhaka_div", for which  only the
*.shx is shown.

Try ogrListLayers(path.expand("/Volumes/DS2S/R_QGIS_codes//Data")) to try
to detect valid layers. If you really meant "indicators", use
paste0("CSV:", file.path(path.expand("/Volumes/DS2S/R_QGIS_codes//Data"),
"indicators.csv")) as per the GDAL vector driver help page.

Roger

On Sat, Nov 9, 2019 at 5:07 PM Roger Bivand <Roger.Bivand at nhh.no>

wrote:

On Fri, 8 Nov 2019, Abdoulaye Sarr wrote:

I am trying to read a shapefile using readOGR but keep getting error
messages:
map =

readOGR(dsn=path.expand("/Volumes/DS2S/R_QGIS_codes//Data"),"indicator")

Error in ogrInfo(dsn = dsn, layer = layer, encoding = encoding,

use_iconv =

use_iconv,  :
 Cannot open layer

What is "/Volumes/DS2S/R_QGIS_codes//Data"? If a network drive, some

OGR

drivers are known not to work with them (or that used to be the case).
Which OS/Platform is this? Is the repeated "//" correct? Can you see

the

file running list.files("/Volumes/DS2S/R_QGIS_codes//Data") ?

Roger

What could be causing the problem? sp 1.3-2

Thanks
as

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--
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; e-mail: Roger.Bivand at nhh.no
https://orcid.org/0000-0003-2392-6140
https://scholar.google.no/citations?user=AWeghB0AAAAJ&hl=en

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--
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; e-mail: Roger.Bivand at nhh.no
https://orcid.org/0000-0003-2392-6140
https://scholar.google.no/citations?user=AWeghB0AAAAJ&hl=en