[ncl-talk] Dont show shapefile polyline outside national boundaries

[Xueyan Zhang]

Hello ncl-talk,

I am drawing the Western United States using the dafault national
boundaries. At the same time, I want to add some shapefile polylines (USGS
HUC2; watershed boundaries). However, some watershed boundaries are outside
the national boundaries. I only want watershed inside national boundaries
show. Any ideas? I use gsn_add_shapefile_polylines in NCL.
[image: BFBFA750-514D-401D-8D01-58E306B56927.png]

Thanks!

Xueyan
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