NAME

       MAPGRD - Draws a lat/lon grid.

SYNOPSIS

       CALL MAPGRD

C-BINDING SYNOPSIS

       #include <ncarg/ncargC.h>

       void c_mapgrd()

DESCRIPTION

       MAPGRD has no arguments.

USAGE

       The statement:

            CALL MAPGRD

       draws a grid consisting of lines of constant latitude (parallels) and lines of constant
       longitude (meridians), spaced as specified by the value of the internal parameter 'GR'.
       If EZMAP needs initialization or if the value of 'GR' is less than or equal to zero or if
       there is an uncleared NCAR Graphics error, MAPGRD does nothing.

       The grid is drawn using calls to MAPIT and MAPIQ.  By default, MAPGRD temporarily forces
       the value of the internal parameter 'DL' to zero, so that the grid will be drawn using
       calls to the routines FRSTD and VECTD, in the dash package.  MAPGRD also temporarily
       forces the use of the dash pattern defined by the internal parameter 'DA'.  A user version
       of the routine MAPUSR may be supplied to change the way in which grid lines are drawn.
       Before returning control to the user, MAPGRD restores the original value of 'DL' and
       resets the current dash pattern to be used by the dash package.

EXAMPLES

       Use the ncargex command to see the following relevant examples: ccpcica, ccpmovi, cmpclr,
       cmpdd, cmpgrd, cmplbl, cmplot, cmptit, epltch, ffex02, fpchiqu.

ACCESS

       To use MAPGRD or c_mapgrd, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c,
       preferably in that order.

SEE ALSO

       Online: ezmap, ezmap_params, mapaci, mapbla, mapblm, mapdrw, mapeod, mapfst, mapgci,
       mapgrm, mapgtc, mapgti, mapgtl, mapgtr, mapint, mapiq, mapiqa, mapiqd, mapiqm, mapit,
       mapita, mapitd, mapitm, maplbl, maplmb, maplot, mappos, maproj, maprs, maprst, mapsav,
       mapset, mapstc, mapsti, mapstl, mapstr, maptra, maptri, maptrn, mapusr, mapvec, mpchln,
       mpfnme, mpgetc, mpgeti, mpgetl, mpgetr, mpglty, mpiaty, mpifnb, mpilnb, mpiola, mpiosa,
       mpipai, mpipan, mpipar, mpisci, mplnam, mplndm, mplndr, mplnri, mpname, mprset, mpsetc,
       mpseti, mpsetl, mpsetr, supmap, supcon, ncarg_cbind

       Hardcopy: NCAR Graphics Contouring and Mapping Tutorial

COPYRIGHT

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.