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Patrick, The latter. The gdprof routine gdpdta.f calls dgcxtp.f and will get the lat/lon and real value row/colum of the gpoint (eg not limited to integer i,j locations), which in turn is used in the call to $GEMPAK/source/gemlib/gr/grintp.f which performs a bilinear interpolation from the grid point values to the gpoint location. Steve Chiswell Unidata User Support. >From: "Patrick O'Reilly" <address@hidden> >Organization: UCAR/Unidata >Keywords: 200404291944.i3TJirtK017446 >Hi, > >I searched the archives high and low, maybe I missed it, but all I wanted to >know was when you draw a profile using GDPROF, and specify station or >lat/lon, does the program draw the profile at the nearest grid point, or >does it interpolate to the exact location you specify. I am guessing the >former. Thanks! > >Patrick >_________________________________________ >Patrick O'Reilly >Meteorological Decision Support Scientist >The STORM Project at UNI >address@hidden 319-273-3789 >http://www.uni.edu/storm > >"No trees were killed in the making of this e-mail...however, > a large number of electrons were horribly inconvenienced." > -- NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publically available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.