[R-sig-Geo] Plotting data on Canadian maps
Michael Friendly
friendly at yorku.ca
Wed Feb 15 15:49:11 CET 2012
Barry Rowlingson replied to a query on R-Help:
> gadm has four levels of Canadian boundaries, at first glance -
> country, province (black), something smaller than province (blue) and
> then red which looks like urban divisions.
>
> The province upper-left doesn't seem to have any blue subdivisions,
> but that's possibly because there would be more subdivisions than
> people who actually live there.
>
> http://www.gadm.org/download
>
> Gadm also has a facility to download the data as .Rdata objects that
> can load straight into R.
I've downloaded the .Rdata versions of the maps of Canada,
CAN_adm[1-4].RData but can't find information on the contents of these
SPDataFrames, other than direct exploration:
> load("CAN_adm1.RData")
> class(gadm)
[1] "SpatialPolygonsDataFrame"
attr(,"package")
[1] "sp"
> names(gadm)
[1] "PID" "ID_0" "ISO" "NAME_0" "ID_1"
"NAME_1" "NL_NAME_1" "VARNAME_1"
[9] "TYPE_1" "ENGTYPE_1"
> gadm$NAME_1
[1] "Alberta" "British Columbia" "Manitoba"
[4] "New Brunswick" "Newfoundland and Labrador" "Northwest
Territories"
[7] "Nova Scotia" "Nunavut" "Ontario"
[10] "Prince Edward Island" "Québec"
"Saskatchewan"
[13] "Yukon"
I'd like to try plotting some data on the map of Ontario. Does anyone
have an example or sources for such data?
-Michael
--
Michael Friendly Email: friendly AT yorku DOT ca
Professor, Psychology Dept.
York University Voice: 416 736-5115 x66249 Fax: 416 736-5814
4700 Keele Street Web: http://www.datavis.ca
Toronto, ONT M3J 1P3 CANADA
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