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

       Many  developers  (who  are  credited  at  http://plplot.sourceforge.net/credits.php) have
       contributed to PLplot over its long history.

SEE ALSO

       PLplot documentation at http://plplot.sourceforge.net/documentation.php.

                                          February, 2016                     PLMERIDIANS(3plplot)