auck.polys {GeoXp} | R Documentation |
A `polylist' object for drawing spatial polygonal contours of auckland dataset.
data(auck.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', `SpatialPolygonDataFrame' 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 created functions `spdf2list', `polylist2list' and `map2list' for extracting from a spatial object only the vertices of the polygons.
Marshall R M (1991) Mapping disease and mortality rates using Empirical Bayes Estimators, Applied Statistics, 40, 283-294.
Bailey T, Gatrell A (1995) Interactive Spatial Data Analysis, Harlow: Longman - INFOMAP data set used with permission.
Bivand R. (2006), `The spdep package', http://cran.r-project.org/doc/packages/spdep.pdf.
data(auck.polys) contours.auckland<-polylist2list(auck.polys)