I'm not sure if this message came through already. We have been having problems with our e-mail system so forgive this second message if everyone has already seen it.
Thank you to Chris Pelkie for helping with my color mapping question. Now I have another. I'm trying to place a United States map on top of a gridded data set of contoured concentrations, but I only want to show those concentrations contained within the State borders. Right now a lot of extraneous data lie outside the States in the oceans and Canada. I constructed the US map the same way Lloyd Treinish constructed his world maps. Any help would be greatly appreciate. Thank you, Michael Rizzo
