oldcol.polys {GeoXp} | R Documentation |
A `polylist' object for drawing spatial polygonal contours of oldcol dataset.
data(oldcol.polys)
The format is a list of polygons of class `polylist'.
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.
Anselin, Luc (1988). ``Spatial econometrics: methods and models''. Dordrecht: Kluwer Academic, Table 12.1 p 189.
Bivand R. (2008), ``The spdep package'', http://cran.r-project.org/doc/packages/spdep.pdf.
data(oldcol.polys)