This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Hi Rod, re: > I have a question about the GRAYOVER command. We can talk about this now or > tomorrow afternoon. Commands I typed on MCIDAS Command. > > *IMGDISP G13/ERAD27APR11 TIME=19:55 LATLON=33 87 REFRESH='EG;MAP > FILE=OUTVHRES;MAP COUNTY=MS AL GA MCOL=7' (All One Line) OK. This IMGDISP invocation does not display the gray bar at the bottom. I think what you want is: IMGDISP G13/ERAD27APR11 TIME=19:55 LATLON=33 87 GRAY=YES EU=CLW3 REFRESH='EG;MAP FILE=OUTVHRES;MAP COUNTY=MS AL GA MCOL=7;GRAYOVER' Now, the labels written by GRAYOVER are not likely to be on top of the gray bar at the bottom. You solve this problem by specifying positional values to the GRAY= keyword used in the IMGDISP command. Remember, to get HELP for IMGDISP, run: HELP IMGDISP The GRAy= section of the online help reads: GRAy=NO | does not display a grayscale bar (def) =YES | adds grayscale bar to bottom of image =repeat inc start line | user-defined grayscale bar, where: repeat - brightess repeat factor (def=5) inc - brightness level increment (def=2) start - starting brightness level (def=0) line - starting TV line; value must be greater than 0 (def=# of lines in frame minus 23) Since you do not want to change the 'repeat', 'inc', 'start' positional values to the GRAY= keyword, you would have something like: IMGDISP G13/ERAD27APR11 TIME=19:55 LATLON=33 87 GRAY=X X X 775 EU=CLW3 REFRESH='EG;MAP FILE=OUTVHRES;MAP COUNTY=MS AL GA MCOL=7;GRAYOVER' You will have to adjust the 'line' value (775 in this example) to position the gray bar where you want with respect to the GRAYOVER annotation. Cheers, Tom -- **************************************************************************** Unidata User Support UCAR Unidata Program (303) 497-8642 P.O. Box 3000 address@hidden Boulder, CO 80307 ---------------------------------------------------------------------------- Unidata HomePage http://www.unidata.ucar.edu **************************************************************************** Ticket Details =================== Ticket ID: KUA-429049 Department: Support McIDAS Priority: Normal Status: Closed