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Hi Shiva, > Many thanks for your response. So if the longitude goes from 0 to 360, > what convention is followed to represent points east and west of the > Greenwich meridian. Also, if I want the conditions at 75 W (longitude), > should I specify -75 or should I specify it as (360-75)? I current > specify it as -75 and I do get some numbers out of the database. > So what does -75 correspond to? The longitude is in degrees east of the Greenwich meridian. So 1 is just east of the meridian and 359 is just west. The prefered input for 75 W would be 285. I'm not sure about what -75 returns. I'm guessing that gets converted to 285 internally as well but I'm not absolutely sure. Ethan Ticket Details =================== Ticket ID: LUC-457370 Department: Support THREDDS Priority: Normal Status: Closed