Vincent, The script polymark.jnl can do this : First read your ascii file (http://ferret.wrc.noaa.gov/Ferret/Documentation/Users_Guide/current/fer_html.htm Ch2 Sec5.1) When you have your longitude latitude and SST_value, try : ! draw basemap go basemap x=lon_min:lon_max y=lat_min:lat_max ! plot point as colored triangle associated with sst value go polymark polygon/over/nolab/key longitude latitude SST_value triangle 0.5 Hope this help. Tony VINCENT_LEFOUEST@uqar.qc.ca wrote:
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