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John, When creating a GINI format product, the projection and data area have to be compatible with the GINI projection model- eg, when using an LCC projection, you have to specify a tangent cone and not a secant cone (eg angle1 == angle3) since GINI itself only supports that special case. Also, the lat/lon boundaries have to be representable to the precision of numbers that can be expressed in the GINI header. If you attempt to create a boundary where the computed DX and DY of the pixel are not compatible, your image projection will be shifted. The example in the help for nex2gini provides an example of a valid region: GRDAREA = 23;-120;47.2634;-63.5664 PROJ = lcc/40;-100;40 KXKY = 4736;3000 Steve Chiswell Unidata User Support On Fri, 2007-09-28 at 09:34 -0600, john wrote: > I am running Gempak 5.10.3 on Fedora Core 6 at home. I installed from > source, and everything works fine. I have a NOAAPORT feed providing data, > and that too is working fine. All single site radar data is visible in NMAP > and looks great. > > I am attempting to use nex2gini to created mosaic radar images. I am using > the example settings from chiz for creating a 1km mosaic. The program runs > without error, and creates a file of proper size (compared to examples of > good ones from other sources). > > My problem is, the navigation is messed up on all the images. Data is > displaced by 50-100 miles. Looping the images in NMAP show that the errors > are consistent. I have made numerous attempts using different projections, > gareas, station tables, kxky values, etc. All images come back with > displaced nav when displayed in NMAP or gpmap. Running nex2img results in > the same thing. > > This morning I cleaned and remade GEMPAK. No errors. No change in output. > > Anyone have any ideas? I'm stuck. > > John Hart > > _______________________________________________ > gembud mailing list > address@hidden > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ -- Steve Chiswell <address@hidden> Unidata