1MAPTRN(3NCARG)                   NCAR GRAPHICS                  MAPTRN(3NCARG)
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NAME

6       MAPTRN - Projects points.
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8       SUPCON is an alternate name for the routine MAPTRN.
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SYNOPSIS

11       CALL MAPTRN (RLAT, RLON, UVAL, VVAL)
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C-BINDING SYNOPSIS

14       #include <ncarg/ncargC.h>
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16       void c_maptrn (float rlat, float rlon, float *uval,
17       float *vval)
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DESCRIPTION

20       RLAT and RLON
21                   (input expressions, of type REAL) are the latitude and
22                   longitude, respectively, of a point on the globe. RLAT must
23                   be between -90. and +90., inclusive; RLON must be between
24                   -540. and +540., inclusive.
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26       UVAL and VVAL
27                   (output variables, of type REAL) define the point
28                   (UVAL,VVAL) that is the projection in the u/v plane of
29                   (RLAT,RLON). The units of UVAL and VVAL depend on the
30                   projection.
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32                   If the point is not projectable, UVAL is returned equal to
33                   1.E12.  If the point is projectable, but outside the
34                   boundary of the map (as defined by the last call to MAPSET
35                   and by the value of the parameter 'EL'), the routine
36                   MAPTRN, unlike MAPTRA, still returns its u and v
37                   coordinates.
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C-BINDING DESCRIPTION

40       The C-binding argument descriptions are the same as the FORTRAN
41       argument descriptions.
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EXAMPLES

44       Use the ncargex command to see the following relevant examples: cpex03,
45       mpex09.
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ACCESS

48       To use MAPTRN or c_maptrn, load the NCAR Graphics libraries ncarg,
49       ncarg_gks, and ncarg_c, preferably in that order.
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MESSAGES

52       See the ezmap man page for a description of all EZMAP error messages
53       and/or informational messages.
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SEE ALSO

56       Online: ezmap, ezmap_params, mapaci, mapbla, mapblm, mapdrw, mapeod,
57       mapfst, mapgci, mapgrd, mapgrm, mapgtc, mapgti, mapgtl, mapgtr, mapint,
58       mapiq, mapiqa, mapiqd, mapiqm, mapit, mapita, mapitd, mapitm, maplbl,
59       maplmb, maplot, mappos, maproj, maprs, maprst, mapsav, mapset, mapstc,
60       mapsti, mapstl, mapstr, maptra, maptri, mapusr, mapvec, mpchln, mpfnme,
61       mpgetc, mpgeti, mpgetl, mpgetr, mpglty, mpiaty, mpifnb, mpilnb, mpiola,
62       mpiosa, mpipai, mpipan, mpipar, mpisci, mplnam, mplndm, mplndr, mplnri,
63       mpname, mprset, mpsetc, mpseti, mpsetl, mpsetr, supmap, supcon,
64       ncarg_cbind
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66       Hardcopy: NCAR Graphics Contouring and Mapping Tutorial
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69       Copyright (C) 1987-2007
70       University Corporation for Atmospheric Research
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72       This documentation is free software; you can redistribute it and/or
73       modify it under the terms of the GNU General Public License as
74       published by the Free Software Foundation; either version 2 of the
75       License, or (at your option) any later version.
76
77       This software is distributed in the hope that it will be useful, but
78       WITHOUT ANY WARRANTY; without even the implied warranty of
79       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
80       General Public License for more details.
81
82       You should have received a copy of the GNU General Public License along
83       with this software; if not, write to the Free Software Foundation,
84       Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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88UNIX                              March 1993                    MAPTRN(3NCARG)
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