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) 1987-2009
62       University Corporation for Atmospheric Research
63       The use of this Software is governed by a License Agreement.
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67UNIX                              March 1993                    MAPTRA(3NCARG)
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