This is a pretty general question, and there are potentially many
ways to do it.
One way to get started would be to follow the example(s) in the help
page for the overlay() function in the sp package.
-Don
At 1:26 PM -0400 4/20/09, Alina Sheyman wrote:
I have a list of made-up districts and corresponding zip codes. Based on
that I want to define my own polygons (for each district) and then use them
to create a map. Does anyone know how I would go about defining these?
thank you
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--
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062
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