20050818: Colorbar max/min for radar plots

Pete,

To change the valid data range, which is used for the image bar, you would want 
to
modify $GEMTBL/sat/imgtyp.tbl for the min/max pixel values for the particular
(reflectivity in this case) band setting being used.

My defaults for reflectivity are 0 to 105 pixel values, which relate to
the dBZ values or -30 to 75 based on the $GEMTBL/unidata/nex2gini.tbl
ranges being used by nex2gini.

Steve Chiswell
Unidata User Support



>From: address@hidden (Pete Pokrandt)
>Organization: UCAR/Unidata
>Keywords: 200508181605.j7IG5bjo004934

>
>Steve,
>
>I am using gpmap to plot gini radar composites that I am creating,
>and I can't figure out a way to change the max/min limits on the 
>colorbar when it's plotted.
>
>I'm plotting the data using a customized upc_rad24.tbl, where the
>lowest levels are all set to zero, so they aren't plotted. For this
>particular plot, I start coloring at 15 DBZ, but there are levels
>below that plotted as black (down to -30 dbz).
>
>What's the best way to get this plot but have the image color bar
>start at 15 dbz instead of -30?
>
>Example image at:
>
>http://tempest.aos.wisc.edu/radar/owlcomp.gif
>
>Let me know if you need the values of any GEMPAK variables used in the 
>creation of this plot.
>
>The upc_rad24.tbl (actually it's called upc_owl24.tbl) that I'm using 
>looks like
>
>! upc_owl24.tbl
>!
>! Color table for 24-level NIDS Reflectivity
>!
>!Color name    Abrev   Red  Green   Blue  X color name
>                         0      0      0
>                         0      0      0
>                         0      0      0
>                         0      0      0
>                         0      0      0
>                         0      0      0
>                         0      0      0
>                         0      0      0
>                         0      0      0
>                         0      0      0
>                        30    144    255  DodgerBlue1
>                         0    238    238  cyan2
>                         0    139    000  green4
>                         0    205    000  green3
>                       127    255    000  chartreuse1
>                       255    255      0  yellow2
>                       231    192      0  gold1
>                       255    144      0  DarkOrange1
>                       255      0      0  red
>                       214      0      0  red3
>                       192      0      0  red4
>                       255      0    255  magenta
>                       153     85    201  MediumPurple3
>                       255    255    255  white
>
>Thanks!
>
>Pete
>
>--
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>^ Systems Programmer               V Madison,         WI     53706    ^
>^                                  V      address@hidden       ^
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