Provided by: libncarg-dev_6.3.0-6build1_amd64 
NAME
NGWSYM - Draws a symbol from the standard WMO/NOAA meteorological fonts by reference to
the font name and symbol number within that font.
SYNOPSIS
CALL NGWSYM(FTYPE,NUM,X,Y,SIZE,ICOLOR,IALT)
C-BINDING SYNOPSIS
#include <ncarg/ncargC.h>
void c_ngwsym(char *ftype, int num, float x, float y,
float size, int icolor, int ialt)
DESCRIPTION
FTYPE (an input parameter of type CHARACTER) specifying the desired font. Legal
values are:
'WW' - Present weather.
'C' - Cloud types.
'CL' - Low clouds.
'CM' - Medium clouds.
'CH' - High clouds.
'W' - Past weather.
'N' - Sky cover.
'a' - Pressure tendency.
NUM (an input parameter of type INTEGER) specifying the number of the desired
symbol within the specified font.
X (an input parameter of type REAL) specifying the X coordinate position, in
world coordinates, where the symbol is to be positioned. This X position
marks the horizontal center of the symbol.
Y (an input parameter of type REAL) specifying the Y coordinate position, in
world coordinates, where the symbol is to be positioned. This Y position
marks the vertical center of the symbol.
SIZE (an input parameter of type REAL) the value of which is the height, in world
coordinates, of the symbol.
ICOLOR (an input parameter of type INTEGER) the value of which is the GKS color index
specifying what color the symbol will be.
IALT (an input parameter of type INTEGER) indicating whether an alternate
representation for the specified symbol is to be used. If IALT=1, then the
alternate symbol for the one specified is drawn. This applies only to a few
symbols such as numbers 7, 93, 94, 95, 97 in the WW font and number 3 in the W
font.
C-BINDING DESCRIPTION
The C binding argument descriptions are the same as the FORTRAN argument descriptions.
USAGE
This function simply looks up the appropriate symbol in either font 36 or 37 of Plotchar
and uses Plotchar to draw the symbol.
To produce a table of all the weather symbols broken down by font and symbol number,
execute "ncargex fngwsym".
For the WW (present weather) font, the descriptions for the symbols are:
0 Cloud development NOT observed or NOT observable during past hour
1 Clouds generally dissolving or becoming less developed during past hour
2 State of sky on the whole unchanged during past hour
3 Clouds generally forming or developing during past hour
4 Visibility reduced by smoke
5 Haze
6 Widespread dust in suspension in the air, NOT raised by wind, at time of observation
7 Dust or sand raised by wind at time of observation
8 Well-developed dust whirl(s) within past hour
9 Dust storm or sandstorm within sight of or at station during past hour
10 Light fog (mist)
11 Patches of shallow fog at station, NOT deeper than 6 feet on land
12 More or less continuous shallow fog at station, NOT deeper than 6 feet on land
13 Lightning visible, no thunder heard
14 Precipitation within sight, but NOT reaching the ground
15 Precipitation within sight, reaching the ground but distant from station
16 Precipitation within sight, reaching the ground, near to but NOT at station
17 Thunderstorm, but no precipitation at the station
18 Squall(s) within sight during past hour or at time of observation
19 Funnel cloud(s) within sight of station at time of observation
20 Drizzle (NOT freezing) or snow grains (NOT falling as showers) during past hour, but
NOT at time of observation
21 Rain (NOT freezing and not falling as showers) during past hour, but NOT at time of
observation
22 Snow (NOT falling as showers) during past hour, but NOT at time of observation
23 Rain and snow or ice pellets (NOT falling as showers) during past hour, but NOT at
time of observation
24 Freezing drizzle or freezing rain (NOT falling as showers) during past hour, but NOT
at time of observation
25 Showers of rain during past hour, but NOT at time of observation
26 Showers of snow or of rain and snow, during past hour, but NOT at time of
observation
27 Showers of hail or of hail and rain, during past hour, but NOT at time of
observation
28 Fog during past hour, but NOT at time of observation
29 Thunderstorm (with or without precipitation) during past hour, but NOT at time of
observation
30 Slight or moderate dust storm or sandstorm, has decreased during past hour
31 Slight or moderate dust storm or sandstorm, no appreciable change during past hour
32 Slight or moderate dust storm or sandstorm has begun or increased during past hour
33 Severe dust storm or sandstorm, has decreased during past hour
34 Severe dust storm or sandstorm, no appreciable change during past hour
35 Severe dust storm or sandstorm has begun or increased during past hour
36 Slight or moderate drifting snow, generally low (less than 6 feet)
37 Heavy drifting snow, generally low
38 Slight or moderate blowing snow, generally high (more than 6 feet)
39 Heavy blowing snow, generally high
40 For or ice fog at distance at time of observation, but NOT at station during past
hour
41 Fog or ice fog in patches
42 Fog or ice fog, sky discernible, has become thinner during past hour
43 Fog or ice fog, sky NOT discernible, has become thinner during past hour
44 Fog or ice fog, sky discernible, no appreciable change during past hour
45 Fog or ice fog, sky NOT discernible, no appreciable change during past hour
46 Fog or ice fog, sky discernible, has begun or become thicker during past hour
47 Fog or ice fog, sky NOT discernible, has begun or become thicker during past hour
48 Fog depositing rime, sky discernible
49 Fog depositing rime, sky NOT discernible
50 Intermittent drizzle (NOT freezing), slight at time of observation
51 Continuous drizzle (NOT freezing), slight at time of observation
52 Intermittent drizzle (NOT freezing), moderate at time of observation
53 Continuous drizzle (NOT freezing), moderate at time of observation
54 Intermittent drizzle (NOT freezing), heavy at time of observation
55 Continuous drizzle (NOT freezing), heavy at time of observation
56 Slight freezing drizzle
57 Moderate or heavy freezing drizzle
58 Drizzle and rain, slight
59 Drizzle and rain, moderate or heavy
60 Intermittent rain (NOT freezing), slight at time of observation
61 Continuous rain (NOT freezing), slight at time of observation
62 Intermittent rain (NOT freezing), moderate at time of observation
63 Continuous rain (NOT freezing), moderate at time of observation
64 Intermittent rain (NOT freezing), heavy at time of observation
65 Continuous rain (NOT freezing), heavy at time of observation
66 Slight freezing rain
67 Moderate or heavy freezing rain
68 Rain or drizzle and snow, slight
69 Rain or drizzle and snow, moderate or heavy
70 Intermittent fall of snowflakes, slight at time of observation
71 Continuous fall of snowflakes, slight at time of observation
72 Intermittent fall of snowflakes, moderate at time of observation
73 Continuous fall of snowflakes, moderate at time of observation
74 Intermittent fall of snowflakes, heavy at time of observation
75 Continuous fall of snowflakes, heavy at time of observation
76 Ice prisms (with or without fog)
77 Snow grains (with or without fog)
78 Isolated starlike snow crystals (with or without fog)
79 Ice pellets or snow pellets
80 Slight rain shower(s)
81 Moderate or heavy rain shower(s)
82 Violent rain shower(s)
83 Slight shower(s) of rain and snow mixed
84 Moderate or heavy shower(s) of rain and snow mixed
85 Slight snow shower(s)
86 Moderate or heavy snow shower(s)
87 Slight shower(s) of snow pellets, or ice pellets with or without rain, or rain and
snow mixed
88 Moderate or heavy shower(s) of snow pellets, or ice pellets, or ice pellets with or
without rain or rain and snow mixed
89 Slight shower(s) of hail, with or without rain or rain and snow mixed, not
associated with thunder
90 Moderate or heavy shower(s) of hail, with or without rain, or rain and snow mixed,
not associated with thunder
91 Slight rain at time of observation; thunderstorm during past hour, but NOT at time
of observation
92 Moderate or heavy rain at time of observation; thunderstorm during past hour, but
NOT at time of observation
93 Slight snow, or rain and snow mixed, or hail at time of observation; thunderstorm
during past hour, but NOT at time of observation
94 Moderate or heavy snow, or rain and snow mixed, or hail at time of observation;
thunderstorm during past hour, but NOT at time of observation
95 Slight or moderate thunderstorm without hail, but with rain and/or snow at time of
observation
96 Slight or moderate thunderstorm, with hail at time of observation
97 Heavy thunderstorm, without hail, but with rain and/or snow at time of observation
98 Thunderstorm combined with dust storm or sandstorm at time of observation
99 Heavy thunderstorm with hail at time of observation
For the C (cloud types) font:
0 Ci - Cirrus
1 Cc - Cirrocumulus
2 Cs - Cirrostratus
3 Ac - Altocumulus
4 As - Altostratus
5 Ns - Nimbostratus
6 Sc - Stratocumulus
7 St - Stratus
8 Cu - Cumulus
9 Cb - Cumulonimbus
For the CL (low clouds) font:
0 not defined
1 Cu of fair weather, little vertical development and seemingly flattened
2 Cu of considerable development, generally towering, with or without other Cu or Sc
bases all at same level
3 Cb with tops lacking clear-cut outlines, but distinctly not cirriform or anvil-
shaped; with or without Cu, Sc, St
4 Sc formed by spreading out of Cu; Cu often present also
5 Sc not formed by spreading out of Cu
6 St or StFra (stratus fractus), but no StFra of bad weather
7 StFra and/or CuFra of bad weather (scud)
8 Cu and Sc (not formed by spreading out of Cu) with bases at different levels
9 Cb having clearly fibrous (cirriform) top, often anvil-shaped, with or without Cu,
Sc, St, or scud
For the CM (medium clouds) font:
0 not defined
1 Thin As (most of cloud layer semitransparent)
2 Thick As, greater part sufficiently dense to hide sun (or moon), or Ns
3 Thin Ac, mostly semitransparent: cloud elements not changing much and at a single
level
4 Thin Ac in patches; cloud elements continually changing and/or occurring at more
than one level
5 Thin Ac in bands or in a layer gradually spreading over sky and usually thickening
as a whole
6 Ac formed by the spreading out of Cu or Cb
7 Double-layered Ac, or a thick layer of Ac, not increasing; or Ac with As and/or Ns
8 Ac in the form of Cu-shaped tufts or Ac with turrets
9 Ac of a chaotic sky, usually at different levels; patches of dense Ci are usually
present also
For the CH (high clouds) font:
0 not defined
1 Filaments of Ci, or "mares tails," scattered and not increasing
2 Dense Ci in patches or twisted sheaves, usually not increasing, sometimes like
remains of Cb; or towers or tufts
3 Dense Ci, often anvil-shaped, derived from or associated with Cb
4 Ci, often hook-shaped, gradually spreading over the sky and usually thickening as a
whole
5 Ci and Cs, often in converging bands, or Cs alone; generally overspreading and
growing denser; the continuous layer not reaching 45 degree altitude
6 Ci and Cs, often in converging bands, or Cs alone; generally overspreading and
growing denser; the continuous layer exceeding 45 degree altitude
7 Veil of Cs covering the entire sky
8 Cs not increasing and not covering entire sky
9 Cc alone or Cc with some Ci or Cs, but the Cc being the main cirriform cloud
For the W (past weather) font:
0 Clear or few clouds [no associated symbol]
1 Partly cloudy (scattered) or variable sky [no associated symbol]
2 Cloudy (broken) or overcast [no associated symbol]
3 Sandstorm or dust storm, or drifting or blowing snow
4 Fog, ice fog, thick haze or thick smoke
5 Drizzle
6 Rain
7 Snow, or rain and snow mixed, or ice pellets
8 Shower(s)
9 Thunderstorm, with or without precipitation
For the N (sky cover) font:
0 No clouds
1 One-tenth or less
2 Two-tenths or three-tenths
3 Four-tenths
4 Five-tenths
5 Six-tenths
6 Seven-tenths or eight tenths
7 Nine-tenths or overcast with openings
8 Completely overcast (ten-tenths)
9 Sky obscured
For the a (pressure tendency) font:
0 Rising, then falling; same as or higher than 3 hours ago
1 Rising, then steady; or rising, then rising more slowly
2 Rising steadily, or unsteadily
3 Falling or steady, then rising; or rising, then rising more rapidly
4 Steady; same as 3 hours ago
5 Falling, then rising; same as or lower than 3 hours ago
6 Falling, then steady; or falling, then falling more slowly
7 Falling steadily, or unsteadily
8 Steady or rising, then falling; or falling, then falling more rapidly
9 not defined
EXAMPLES
CALL NGWSYM('N',5,.5,.5,.25,1,0)
Plots the symbol for six-tenths cloud cover at position (.5,.5) and height .25 in
the foreground color.
CALL NGWSYM('a',6,.2,.8,.3,1,0)
Plots the symbol for barometric pressure that is falling then steady.
CALL NGWSYM('WW',95,.5,.5,.2,1,1)
Plots the alternate symbol for slight or moderate thunderstorm without hail.
Use the ncargex command to see the following relevant example: fngwsym.
ACCESS
To use NGWSYM or c_ngwsym, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c,
preferably in that order.
MESSAGES
If an illegal font, or symbol number within a font, is requested, then a warning is
issued.
SEE ALSO
Online: plotchar(3NCARG), ncarg_cbind(3NCARG)
Hardcopy: NCAR Graphics Fundamentals, UNIX Version
COPYRIGHT
Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.