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
              corresponding 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.


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.



                                November, 2007                  PLMERIDIANS(3)
