Re: [R] Error opening SHP file (maptools)
[EMAIL PROTECTED] 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 __ R-help@r-project.org mailing list 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. 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 __ R-help@r-project.org mailing list 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.
Re: [R] Error opening SHP file (maptools)
The help page for readShapePoints says that the file name that you supply should not include the extension. The system.file part of the example in the help page is only to use the example file that came with the package. Since you want to open your own file you omit the system.file() bit. Do something like: readShapePoints( 'C:/path_to_my_file/filename') Hope this helps. -Don At 12:05 PM -0600 3/11/08, [EMAIL PROTECTED] wrote: 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 __ R-help@r-project.org mailing list 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. -- - Don MacQueen Lawrence Livermore National Laboratory Livermore, CA, USA 925-423-1062 [EMAIL PROTECTED] __ R-help@r-project.org mailing list 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.
