oldcol.polys {GeoXp}R Documentation

Spatial polygonal contours of oldcol dataset

Description

A `polylist' object for drawing spatial polygonal contours of oldcol dataset.

Usage

data(oldcol.polys)

Format

The format is a list of polygons of class `polylist'.

Details

This object is used in the `spdep' package, created by Roger Bivand. In the `GeoXp' package, we don't use `polylist', `SpatialPolygon' or `Map' object because a site can only be represented by a pair of coordinates and not by a polygonnal contour. However, users have the possibility to repesent spatial polygonal contours as a backgroud map. That's why we create functions `sp2list',`polylist2list' and `map2list' for extracting of spatial object only the vertices of the polygons.

Note

This data file prepared by Luc Anselin, Spatial Analysis Laboratory, Department of Agriculture and Consumer Economics, University of Illinois, Urbana-Champaign.

Source

Anselin, Luc (1988). ``Spatial econometrics: methods and models''. Dordrecht: Kluwer Academic, Table 12.1 p 189.

References

Bivand R. (2006), ``The spdep package'', http://cran.r-project.org/doc/packages/spdep.pdf.

Examples

data(oldcol.polys)

[Package GeoXp version 1.0 Index]