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Hi Chamarthi, How are the longitudes and latitudes arranged in your input file? One method as others have suggested is to interpolate the data onto a regular grid, but if we can work out how to read the longitude and latitude locations into a 2-dimensional grid, and the data field onto the correct 3-dimensional grid, then you could visualize the data on the curvilinear grid without regridding it. For plotting data on the curvilinear grid, Ferret expects that the longitudes and latitudes, as well as the data field are arranged on a grid in X and Y where X and Y are just index values 1 to M and 1 to N, so that after opening the file and defining the grid correctly, you could do a SHOW DATA command, and see something like this: yes? show dataYou would open your data file, if possible following the examples found in the Ferret Users Guide by following the index entry "ASCII data: reading, examples", and then the command to make the plot would be a FILL or SHADE command such as yes? FILL/Z=0 temp, lon, latThen the plot will show both the data, and the shape of the curvilinear grid. If you need help reading your data, please send more information showing the format of your ASCII file. Ansley Srinivas Chamarthi wrote:
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