If you did not find the geographic information you need in the first propositions of the map section of the gallery, you need to find this information somewhere else, on the web. Usually, you will find it as a shape file format. This format is composed by several files that you need to keep together in the same folder.


You can download these files from the web easily. Here is an example: how to download a shapefile, charge it into R with the rgdal library, and plot it.


See graphics #169 and #170 for further manipulation: zooming and selecting areas.






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