Hi Changshui, There's a Ferret FAQ about coastlines, Where can I get detailed coastlines and political borders to overlay on my plots? which talks about one source for coastline data, but you can use data from any source. What you need to do is replace any breaks in the line with two recognizable flags, such as the default missing-value -1.e34. Then read the ascii data into Ferret as shown in the FAQ and write it as a netCDF file. Now you'll need to make your own script which you will call instead of "go land" or "go land_detail" >Fgo land.jnl shows you where it is; copy that script to a new name, and reaplace the dataset that it opens with your customized land dataset. Ansley On 12/16/2010 5:58 AM, Changshui Xia wrote:
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