I’m working on a national mapping project and would like to make a census tract shapefile for the county that has water boundaries clipped to the shore line. To my knowledge, there isn’t one of these available. So, I’m wondering if there is a national shapefile for water areas. That way I can join it with a census tract file to remove all the water areas so maps look better. I’ve done this for local areas, but I plan to make maps across the country, so I figure doing it once for the whole country will be easier.