1PLMERIDIANS(3plplot)              PLplot API              PLMERIDIANS(3plplot)
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NAME

6       plmeridians - Plot latitude and longitude lines.
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SYNOPSIS

9       plmeridians(mapform, dlong, dlat, minlong, maxlong, minlat, maxlat)
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DESCRIPTION

12       Displays  latitude  and  longitude  on the current plot.  The lines are
13       plotted in the current color and line style.
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15       Redacted form:  General:  plmeridians(mapform,  dlong,  dlat,  minlong,
16       maxlong, minlat, maxlat) F95, Java, Perl/PDL, Python: Not implemented?
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19       This function is used in example 19.
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ARGUMENTS

22       mapform (void (*) (PLINT, PLFLT *, PLFLT *), input)
23              A user supplied function to transform the coordinate  longitudes
24              and latitudes to a  plot  coordinate  system.    By  using  this
25              transform,  we can change from a longitude,  latitude coordinate
26              to a polar  stereographic  project,  for   example.   Initially,
27              x[0]..[n-1]  are the longitudes and y[0]..y[n-1]  are the corre‐
28              sponding latitudes.  After the call to mapform(), x[]   and  y[]
29              should  be  replaced by the corresponding plot coordinates.   If
30              no transform is desired, mapform can be replaced by NULL.
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32       dlong (PLFLT, input)
33              The interval in degrees at which the longitude lines are  to  be
34              plotted.
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36       dlat (PLFLT, input)
37              The  interval  in  degrees at which the latitude lines are to be
38              plotted.
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40       minlong (PLFLT, input)
41              The value of the longitude on the left side of  the  plot.   The
42              value of minlong must be less than the value of maxlong, and the
43              quantity maxlong-minlong must be less than or equal to 360.
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45       maxlong (PLFLT, input)
46              The value of the longitude on the right side of the plot.
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48       minlat (PLFLT, input)
49              The minimum latitude to be plotted on the background.   One  can
50              always  use  -90.0 as the boundary outside the plot window  will
51              be automatically  eliminated.   However,  the  program  will  be
52              faster if one can reduce the size of the background plotted.
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54       maxlat (PLFLT, input)
55              The maximum latitudes to be plotted on the background.   One can
56              always use 90.0 as the boundary outside the plot window  will be
57              automatically eliminated.
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AUTHORS

61       Geoffrey  Furnish  and  Maurice LeBrun wrote and maintain PLplot.  This
62       man page was automatically generated from the  DocBook  source  of  the
63       PLplot   documentation,   maintained   by  Alan  W.  Irwin  and  Rafael
64       Laboissiere.
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SEE ALSO

67       PLplot documentation at http://plplot.sourceforge.net/resources.
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71                                  July, 2010              PLMERIDIANS(3plplot)
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