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> Hi Yuan, > > This is to introduce to you Mr. Rick Lumpkin, who manages the enormous > Global Drifter Program database at NOAA's lab in Miami. He can provide all > the details and links, etc. When I have a class, I just wave an image like > the attached and say, how'd you like to handle data like this every day? > > Some of Rick's data products include a monthly climatology of surface > currents, based on years of real data. I have exercises using his > climatological grids at > <http://marinedataliteracy.org/vectors/gdp_vecs.htm> 6.3 Surface Current > Vectors from the Global Drifter Program: NetCDF Option > <http://marinedataliteracy.org/vectors/gdp_vecs.htm> and his near-real-time > trajectories at <http://marinedataliteracy.org/ops/gdp_buoys.htm> 9.23 > Visualizing Drifting Buoy Trajectories in IDV: GDP > <http://marinedataliteracy.org/ops/gdp_buoys.htm> . But there seems to be a > difficulty using IDV to display the vectors from U and V NetCDF component > grids. It may just be a small format issue, but I can't get IDV to "see" > anything more than a single one of Rick's grid objects (the number of buoy > days per grid cell). Anyway, that's what I know, and I offered to help with > an intro. > > Please take it from here. > > Murray Hi Murray, Thanks for the introduction. If this dataset is point observation, you should be able to use the Formula > Grids > Make flow vectors from u and v data. When the new window popup, select wind speed and direction in each panel. You will get the vector display. Sorry I am out of town for the rest of this month and not able to down the dataset to test it out. Yuan > > PS. The global, 12-month NetCDF climatology file is 130 MB, which may also > be an issue. HDFView can read it fine, and apparently so can ncBrowse. > > Murray Brown > > 1710 Washington St. > New Smyrna Beach, Florida 32168 > PLEASE USE ONLY THIS EMAIL --> address@hidden > www.marinedataliteracy.org <http://www.marinedataliteracy.org/> > > Ticket Details =================== Ticket ID: ZHL-661606 Department: Support IDV Priority: Normal Status: Open