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Brian, The cross section plots are x/y "graph" mode plots and not lat/lon "map" mode plots, so gpanot will not be able to convert lat/lon into axis locations to overlay on gdcross output. You could calculate x/y screen locations based on cross section relative locations (eg calculating a normalized 0,1 distance of an aircraft lat/lon from the cross section cxstns location and then plot those locations versus a scaled height, but can't be done automatically at this time given the tools at hand. Are your aircraft locations in a GEMPAK surface data file? Steve Chiswell Unidata User Support > Hi Steve! > > I was wondering if there is a way to plot an annotation > on a cross section. I've used GDCROSS to create a > cross section of model data, and would like to super- > impose an aircraft track onto it. I have lat, lon, alt for > the aircraft data, and the cross section is height based. > > I thought of using GPANOT, but I'm not sure if it was > designed to be used with cross sections. The LOCI > parameter allows for lat, lon but not alt. > > Do you know of a way to do this? > > > Brian Jamison > > > > Ticket Details =================== Ticket ID: PGI-541511 Department: Support GEMPAK Priority: Normal Status: Closed