[ncl-talk] How can I mask regions ousider of the interest area using a .shp file

[Leo Niu]

I'm ploting a contour of an area. But boundries of the interest area in Ncarg4_0 database can't match with my shapefile. I have searched for ploting an area and masking outside using a polyline or polygon shapefile on www.ncl.ucar.edu.But I haven't found a method dealing with this. Is there some ways that can help in ploting contour of an area only inside of a geocoded polygon？ Thanks a lot. leo2018niu 邮箱：leo2018niu at gmail.com 签名由 网易邮箱大师 定制
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