Hi, > I only need, for now, to work on two areas: Burgundy and Centre, > I would like to extract those two areas from the France file, > I tried, naïvely, > Centre <- France[France$NAME_1=="Centre", ]
try: > Centre <- france[fra...@data$name_1=="Centre",] > PS: I found quite a lot of information on points, ploygons, or lines, > but few on spatialpolygonsdataframe besides they are "a set of spatial > polygons", Any reference on their inside structure ? see: > ?SpatialPolygonsDataFrame A SpatialPolygonsDataFrame is made up of a data.frame and an object of class SpatialPolygons, which is a list of objects of class Polygons, which is made up of a list with Polygon class objects. You can use getSlots to list the available slots of the various object types. > ?getSlots Regards, Carson _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
