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

6       MAPTRA - Projects points.
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SYNOPSIS

9       CALL MAPTRA (RLAT,RLON,UVAL,VVAL)
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C-BINDING SYNOPSIS

12       #include <ncarg/ncargC.h>
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14       void c_maptra (float rlat, float rlon, float *uval,
15       float *vval)
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DESCRIPTION

18       RLAT and RLON
19                   (input expressions, of type REAL) are the latitude and
20                   longitude, respectively, of a point on the globe. RLAT must
21                   be between -90. and +90., inclusive; RLON must be between
22                   -540. and +540., inclusive.
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24       UVAL and VVAL
25                   (output variables, of type REAL) define the point
26                   (UVAL,VVAL) that is the projection in the u/v plane of
27                   (RLAT,RLON). The units of UVAL and VVAL depend on the
28                   projection.
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30                   If the point is not projectable or if it is outside the
31                   boundary of the map (as defined by the last call to MAPSET
32                   and by the value of the parameter 'EL'), UVAL is returned
33                   equal to 1.E12.
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C-BINDING DESCRIPTION

36       The C-binding argument descriptions are the same as the FORTRAN
37       argument descriptions.
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EXAMPLES

40       Use the ncargex command to see the following relevant examples:
41       ccpmpxy, cmptra, fgkgtx, fngngdts.
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ACCESS

44       To use MAPTRA or c_maptra, load the NCAR Graphics libraries ncarg,
45       ncarg_gks, and ncarg_c, preferably in that order.
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SEE ALSO

48       Online: ezmap, ezmap_params, mapaci, mapbla, mapblm, mapdrw, mapeod,
49       mapfst, mapgci, mapgrd, mapgrm, mapgtc, mapgti, mapgtl, mapgtr, mapint,
50       mapiq, mapiqa, mapiqd, mapiqm, mapit, mapita, mapitd, mapitm, maplbl,
51       maplmb, maplot, mappos, maproj, maprs, maprst, mapsav, mapset, mapstc,
52       mapsti, mapstl, mapstr, maptri, maptrn, mapusr, mapvec, mpchln, mpfnme,
53       mpgetc, mpgeti, mpgetl, mpgetr, mpglty, mpiaty, mpifnb, mpilnb, mpiola,
54       mpiosa, mpipai, mpipan, mpipar, mpisci, mplnam, mplndm, mplndr, mplnri,
55       mpname, mprset, mpsetc, mpseti, mpsetl, mpsetr, supmap, supcon,
56       ncarg_cbind
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58       Hardcopy: NCAR Graphics Contouring and Mapping Tutorial
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61       Copyright (C) 1987-2007
62       University Corporation for Atmospheric Research
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64       This documentation is free software; you can redistribute it and/or
65       modify it under the terms of the GNU General Public License as
66       published by the Free Software Foundation; either version 2 of the
67       License, or (at your option) any later version.
68
69       This software is distributed in the hope that it will be useful, but
70       WITHOUT ANY WARRANTY; without even the implied warranty of
71       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
72       General Public License for more details.
73
74       You should have received a copy of the GNU General Public License along
75       with this software; if not, write to the Free Software Foundation,
76       Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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80UNIX                              March 1993                    MAPTRA(3NCARG)
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