[R] Error opening SHP file (maptools)

[Paul Hiemstra]

gerickes at earthlink.net schreef:
> I am having difficulty loading a points shapefile (1600 records) I generated from ArcGIS as a PointsSpatialDataFrame using the maptools readShapePoints function.
>
> library(maptools)
> surveypts <- readShapePoints(system.file("C:/temp/survey.shp", package="maptools")[1]
> Error in getinfo.shape(filen) : Error opening SHP file
>
> I've tried numerous re-exports and renames of the dataset, to no avail. I've also tried placing the shapefile in the library's shapefile folder, with the example dataset (see example below). 
>
> x <- readShapePoints(system.file("shapes/survey.shp", package="maptools")[1]
>
> No luck there either. I'm quite new to R, but I can follow a manual and google well enough. However, I haven't seen anything to help me. The example point datasets load fine. I figure that I'm missing on some familiarity with R and that I don't know the tricks yet. Any help?
>
> Thanks in advance.
>
> Gericke Cook
> USDA-APHIS-PPQ
>
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>   
Hi Gericke,

Why do you use system.file? Probably it will look for survey.shp in the 
maptools package. Try instead:

surveypts <- readShapePoints("C:/temp/survey.shp")

For these kind of geographic questions, the r-sig-geo mailing list is 
maybe a better way to get good answers.

cheers and hth,
Paul

-- 
Drs. Paul Hiemstra
Department of Physical Geography
Faculty of Geosciences
University of Utrecht
Heidelberglaan 2
P.O. Box 80.115
3508 TC Utrecht
Phone:     +31302535773
Fax:    +31302531145
http://intamap.geo.uu.nl/~paul