[ncl-talk] NCL_Add_Grey_Bar_at_Bottom_Vertical_Cross_Section

[lslrsgis at whu.edu.cn]

Dear NCL Community,

May I know how to add a solid gray horizontal line (representing urban area) at bottom of vertial cross section plot as attached figure? Thanks.

What I have found as one similar example is only as follows without bottom gray line:
https://www.ncl.ucar.edu/Applications/Images/wrf_interp_3_lg.png
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