


PLMERIDIANS(3)              PLplot API             PLMERIDIANS(3)


NAME
       plmeridians - Plot latitude and longitude lines.

SYNOPSIS
       plmeridians(mapform, dlong, dlat, minlong, maxlong, minlat, maxlat)

DESCRIPTION
       Displays  latitude  and  longitude  on the current plot.  The lines are
       plotted in the current color and line style.

       Redacted form:  General:  plmeridians(mapform,  dlong,  dlat,  minlong,
       maxlong,  minlat, maxlat) F95, Java, Perl/PDL, Python: Not implemented?


       This function is used in example 19.

ARGUMENTS
       mapform (void (*) (PLINT, PLFLT *, PLFLT *), input)
              A user supplied function to transform the coordinate  longitudes
              and  latitudes  to  a  plot  coordinate  system.   By using this
              transform, we can change from a longitude,  latitude  coordinate
              to  a  polar  stereographic  project,  for  example.  Initially,
              x[0]..[n-1] are the longitudes and y[0]..y[n-1]  are the  corre-
              sponding  latitudes.   After the call to mapform(), x[]  and y[]
              should be replaced by the corresponding plot  coordinates.    If
              no transform is desired, mapform can be replaced by NULL.

       dlong (PLFLT, input)
              The  interval  in degrees at which the longitude lines are to be
              plotted.

       dlat (PLFLT, input)
              The interval in degrees at which the latitude lines  are  to  be
              plotted.

       minlong (PLFLT, input)
              The  value  of  the longitude on the left side of the plot.  The
              value of minlong must be less than the value of maxlong, and the
              quantity maxlong-minlong must be less than or equal to 360.

       maxlong (PLFLT, input)
              The value of the longitude on the right side of the plot.

       minlat (PLFLT, input)
              The  minimum latitude to be plotted on the background.   One can
              always use -90.0 as the boundary outside the plot  window   will
              be  automatically  eliminated.   However,  the  program  will be
              faster if one can reduce the size of the background plotted.

       maxlat (PLFLT, input)
              The maximum latitudes to be plotted on the background.   One can
              always use 90.0 as the boundary outside the plot window  will be
              automatically eliminated.




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PLMERIDIANS(3)              PLplot API             PLMERIDIANS(3)


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

SEE ALSO
       PLplot documentation at http://plplot.sourceforge.net/resources.

















































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