Mapping Program Exercises Answer 2b
Configuring the wind barb to fit all the requirements of this question can be complicated. This is the portion of the help file that you should be using:
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
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. 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.
So the wind barb specification should be BRBK:1:2:232.
GEMPAK-SFMAP>sfparm=skyc;tmpf;wsym;rmsl;ptnd;dwpf;p03i;brbk:.7:4:232 GEMPAK-SFMAP>display AREA Data area co GAREA Graphics area co* SFPARM Surface parameter list skyc;tmpf;wsym;rmsl;ptnt;dwpf;p03i;brbk:.7:4:232 DATTIM Date/time list SFFILE Surface data file $GEMPAKHOME/data/hrcbob.sfc COLORS Color list 1;2;3;25;5;6;7;9 MAP Map color/dash/width 3/1/1 LATLON Line color/dash/width/label/inc 0 MARKER Marker color/type/size/width/hw 0 TITLE Title color/line/title 1/-2 CLEAR Clear screen flag YES PANEL Panel location/color/dash/width 0 DEVICE Graphics device xw PROJ Map projection/angles/margins nps FILTER Filter data factor yes TEXT Text size/font/width/hw flag 1.3/23//HW SKPMIS Skip missing data flag no GEMPAK-SFMAP>r List of times: 910819/0600 910819/0700 910819/0800 910819/0900 910819/1000 910819/1100 910819/1200 910819/1300 910819/1400 910819/1500 910819/1600 910819/1700 910819/1800 910819/1900 910819/2000 910819/2100 910819/2200 910819/2300 910820/0000 910820/0100 910820/0200 910820/0300 910820/0400 910820/0500 910820/0600 Enter a time or type EXIT:19/12 SFMAP PARAMETERS: Data area: co Graphics area name: co* Valid parameters: SKYC TMPF WSYM RMSL PTND DWPF P03I BRBK Parameter colors: 1 2 3 25 5 6 7 9 Time: 910819/1200 File: $GEMPAKHOME/data/hrcbob.sfc Map: 3/1/1 Marker: 0 Title: 1/-2 Device: xw Projection: nps Clear screen: YES Filter: YES Filter factor: 1.00 Panel: 0 Enter <cr> to accept parameters or type EXIT:
