R help - Jul 2010 - how to plot a olygon round map

Hello,

I am plotting a contour map of certain patterns with levelplot and I add a map
of the few countries on the top with the llines command ( I have a data of
longitudes and latitudes for that). But I need to plot a polygon around all the
countries (where the sea is) since the patterns need to be shown only on the top
of the land. May be someone knows how to do it,

thank you,

Irina


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