MAPLBL - Labels the map.

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

       #include <ncarg/ncargC.h>

       void c_maplbl()

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

UNIX                                               March 1993                                     MAPLBL(3NCARG)

       MAPLBL has no arguments.

       Use the ncargex command to see the following relevant examples: cmpclr, cmpel, cmpfil, cmpgrp, cmpita,
       cmpitm, cmplab, cmplbl, cmplot, cmpmsk, cmpou, cmptit, eezmpa, tezmpa, ffex00.

       MAPLBL - Labels the map.

       Online: ezmap, ezmap_params, mapaci, mapbla, mapblm, mapdrw, mapeod, mapfst, mapgci, mapgrd, mapgrm,
       mapgtc, mapgti, mapgtl, mapgtr, mapint, mapiq, mapiqa, mapiqd, mapiqm, mapit, mapita, mapitd, mapitm,
       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

       CALL MAPLBL

       If the parameter 'LA' is set appropriately, MAPLBL labels the international date line (ID), the equator
       (EQ), the Greenwich Meridian (GM), and the poles (NP and SP), and if the parameter 'PE' is set
       appropriately, it draws the perimeter of the map.  If EZMAP needs initialization or if there is an
       uncleared NCAR Graphics error, MAPLBL does nothing.