eire.polys {GeoXp}R Documentation

Spatial polygonal contours of eire dataset

Description

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

Usage

data(eire.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 from a spatial object only the vertices of the polygons.

Source

Upton and Fingleton 1985, Bailey and Gatrell 1995, ch. 1 for blood group data, Cliff and Ord (1973), p. 107 for remaining variables (also after O'Sullivan, 1968). ``Polygon borders and Irish data sourced from Michael Tiefelsdorf's SPSS Saddlepoint''

References

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

Examples

data(eire.polys)
eire.contours<-polylist2list(eire.polys)

[Package GeoXp version 1.0 Index]