trusty (3) plmeridians.3plplot.gz

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, 2014                             PLMERIDIANS(3plplot)