| > I'm trying to overlay a map of the United States onto a gridded contoured | > two dimensional representation of my data concentrations and I only want to | > keep those gridded data which are within the state boundaries. I've tried | > using the mapping module, and it doesn't work. Any help would be | > appreciated.
If each state is represented as a closed polyline, then I think the following would do what you want: Turn closed polyline for state into FLE data (see documentation). Take your_data_grid, and rename "data" to "data_real". Then Map(input = your_data_grid, map = state_fle_data). The resulting your_data_grid will have valid positions only inside the state FLE boundary. This gives you the data points that were inside the state boundary. Mike
