1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
\name{shapefile}
\alias{shapefile}
\alias{shapefile,character-method}
\alias{shapefile,Spatial-method}
\title{
Read or write a shapefile
}
\description{
Reading and writing of "ESRI shapefile" format spatial data. Only the three vector types (points, lines, and polygons) can be stored in shapefiles.
A shapefile should consist of at least four files: .shp (the geometry), .dbf (the attributes), .shx (the index that links the two, and .prj (the coordinate reference system). If the .prj file is missing, a warning is given. If any other file is missing an error occurs (although one could in principle recover the .shx from the .shp file). Additional files are ignored.
}
\usage{
\S4method{shapefile}{character}(x, stringsAsFactors=FALSE, verbose=FALSE, warnPRJ=TRUE, ...)
\S4method{shapefile}{Spatial}(x, filename='', overwrite=FALSE, ...)
}
\arguments{
\item{x}{character (a file name, when reading a shapefile) or Spatial* object (when writing a shapefile)}
\item{filename}{character. Filename to write a shapefile}
\item{overwrite}{logical. Overwrite existing shapefile?}
\item{verbose}{logical. If \code{TRUE}, information about the file is printed}
\item{warnPRJ}{logical. If \code{TRUE}, a warning is given if there is no .prj file}
\item{stringsAsFactors}{logical. If \code{TRUE}, strings are converted to factors}
\item{...}{Additional arguments (none)}
}
\value{
Spatial*DataFrame (reading). Nothing is returned when writing a shapefile.
}
\examples{
filename <- system.file("external/lux.shp", package="raster")
filename
p <- shapefile(filename)
\dontrun{
shapefile(p, 'copy.shp')
}
}
\keyword{spatial}
|
