NGWSYM(3NCARG)

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.