Any advice for the following errors?
state.map <- readShapeSpatial("maps/st24_d00.shp")
Error in getinfo.shape(fn) : Error opening SHP file
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Hi Amoy, Another mystery question. I should have pursued parapsychology. That error statement is usually followed by one noting that the file specified cannot be found. Today's guess is that the R working directory: getwd() did not have a "maps" directory below it. Jim On Fri, Jan 22, 2016 at 11:39 AM, Amoy Yang via R-help <r-help at r-project.org> wrote:> Any advice for the following errors? > state.map <- readShapeSpatial("maps/st24_d00.shp") > Error in getinfo.shape(fn) : Error opening SHP file > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >[[alternative HTML version deleted]]
> On Jan 21, 2016, at 4:39 PM, Amoy Yang via R-help <r-help at r-project.org> wrote: > > Any advice for the following errors? > state.map <- readShapeSpatial("maps/st24_d00.shp") > Error in getinfo.shape(fn) : Error opening SHP fileWhat does list.files('maps') return? Is there a 'st24_d00.shp' value in there? -- David.> > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.David Winsemius Alameda, CA, USA
Agreed with the others. After finding that shapefile and getting it to work you are definitely not in the proper working directory. On Thu, Jan 21, 2016 at 8:40 PM, David Winsemius <dwinsemius at comcast.net> wrote:> >> On Jan 21, 2016, at 4:39 PM, Amoy Yang via R-help <r-help at r-project.org> wrote: >> >> Any advice for the following errors? >> state.map <- readShapeSpatial("maps/st24_d00.shp") >> Error in getinfo.shape(fn) : Error opening SHP file > > What does list.files('maps') return? Is there a 'st24_d00.shp' value in there? > > > -- > David. > >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > > David Winsemius > Alameda, CA, USA > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
We can duplicate the error by giving a path to a non-existent
shapefile, which is probably the original problem:
> require(maptools)
Loading required package: maptools
Loading required package: sp
Checking rgeos availability: TRUE
> foo=readShapeSpatial("fnord.shp")
Error in getinfo.shape(fn) : Error opening SHP file
The error message there isn't totally explicit, and might cover a
range of other possibilities such as a corrupted shapefile, or a
missing .shx component of the shapefile or whatever.
BUT you probably shouldn't be using readShapeSpatial anyway, as it has
a habit of not reading the coordinate system in the .prj file. I find
it much easier to use `raster::shapefile` which *does* read the
coordinate system *and* gives a more explicit error message for a
missing shapefile:
> require(raster)
Loading required package: raster
> foo=shapefile("fnord.shp")
Error in normalizePath(x, winslash = "/", mustWork = TRUE) :
path[1]="fnord.shp": No such file or directory
"No such file or directory"
Barry
On Fri, Jan 22, 2016 at 2:25 AM, boB Rudis <bob at rudis.net>
wrote:> Agreed with the others. After finding that shapefile and getting it to
> work you are definitely not in the proper working directory.
>
> On Thu, Jan 21, 2016 at 8:40 PM, David Winsemius <dwinsemius at
comcast.net> wrote:
>>
>>> On Jan 21, 2016, at 4:39 PM, Amoy Yang via R-help <r-help at
r-project.org> wrote:
>>>
>>> Any advice for the following errors?
>>> state.map <- readShapeSpatial("maps/st24_d00.shp")
>>> Error in getinfo.shape(fn) : Error opening SHP file
>>
>> What does list.files('maps') return? Is there a
'st24_d00.shp' value in there?
>>
>>
>> --
>> David.
>>
>>>
>>> [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more,
see
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>
>> David Winsemius
>> Alameda, CA, USA
>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
This is the results that addresses David's advice.> library(maptools) > library(maps) > state.map <- readShapeSpatial("maps/st24_d00.shp")Error in getinfo.shape(fn) : Error opening SHP file> # David question: What does list.files('maps') return? Is there a 'st24_d00.shp' value in there? > list.files('maps')character(0) I actually use the link below to learn how to load state/zip-data on USA map. # http://stackoverflow.com/questions/1441717/plotting-color-map-with-zip-codes-in-r-or-python Plotting color map with zip codes in R or Python | ? | | ? | | ? | ? | ? | ? | ? | | Plotting color map with zip codes in R or PythonI have some US demographic and firmographic data. I would like to plot zipcode areas in a state or a smaller region (e.g. city). Each area would be annotated by col... | | | | View on stackoverflow.com | Preview by Yahoo | | | | ? | On Friday, January 22, 2016 10:03 AM, Barry Rowlingson <b.rowlingson at lancaster.ac.uk> wrote: We can duplicate the error by giving a path to a non-existent shapefile, which is probably the original problem: > require(maptools) Loading required package: maptools Loading required package: sp Checking rgeos availability: TRUE > foo=readShapeSpatial("fnord.shp") Error in getinfo.shape(fn) : Error opening SHP file The error message there isn't totally explicit, and might cover a range of other possibilities such as a corrupted shapefile, or a missing .shx component of the shapefile or whatever. BUT you probably shouldn't be using readShapeSpatial anyway, as it has a habit of not reading the coordinate system in the .prj file. I find it much easier to use `raster::shapefile` which *does* read the coordinate system *and* gives a more explicit error message for a missing shapefile: > require(raster) Loading required package: raster > foo=shapefile("fnord.shp") Error in normalizePath(x, winslash = "/", mustWork = TRUE) : ? path[1]="fnord.shp": No such file or directory "No such file or directory" Barry On Fri, Jan 22, 2016 at 2:25 AM, boB Rudis <bob at rudis.net> wrote:> Agreed with the others. After finding that shapefile and getting it to > work you are definitely not in the proper working directory. > > On Thu, Jan 21, 2016 at 8:40 PM, David Winsemius <dwinsemius at comcast.net> wrote: >> >>> On Jan 21, 2016, at 4:39 PM, Amoy Yang via R-help <r-help at r-project.org> wrote: >>> >>> Any advice for the following errors? >>> state.map <- readShapeSpatial("maps/st24_d00.shp") >>> Error in getinfo.shape(fn) : Error opening SHP file >> >> What does list.files('maps') return? Is there a 'st24_d00.shp' value in there? >> >> >> -- >> David. >> >>> >>>? ? ? [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >> >> David Winsemius >> Alameda, CA, USA >> >> ______________________________________________ >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]]