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20000622: station/cloud cover circles in GEMPAK
- Subject: 20000622: station/cloud cover circles in GEMPAK
- Date: Thu, 22 Jun 2000 13:20:33 -0600
>From: weather <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200006221852.e5MIqXT28375
>I should know this but I can't figure it out. How can I
>reduce the size of the cloud cover/station marker circle on
>a GEMPAK surface map? Also how could I make the wind barbs smaller?
>
>Thanks,
>Robert Mullenax
>
Robert,
From "phelp sfparm":
In the case of weather symbols, the size, line width and other
information needed to draw the symbol may be specified following a
colon after the symbol name and after the function specifications
if any exist. The drawing attributes are separated by colons. For
all the symbols, the information is entered as:size:width;for arrows
and barbs the information is entered as :size:width:type:headsiz,
where the headsiz applies only to arrows. The type is a three-digit
number, ABC, interpreted digit by digit as follows:
A B C
1 = plot calm wind 1 = start at stn 1 = not filled
2 = ignore calm wind 2 = center at stn 2 = filled
3 = start on sky symbol 3 = not filled with box
4 = filled with box
Calm winds are plotted as a circle or an arrowhead for barbs and
arrows, respectively. Arrowheads and 50-unit barb flags are filled
if C=2 or 4. A box is plotted with background color if C = 3 or 4.
For example, if TYPE=132, a barb will be plotted as a circle if the
wind is calm; it will begin on the edge of the cloud cover symbol,
and 50-unit flags will be filled. The default is 111 unless sky
symbols are being plotted in which case it is 131.
eg:
sfparm = skyc:.5;brbk:.7
Steve Chiswell