MAPTRN(3NCARG) | NCAR GRAPHICS | MAPTRN(3NCARG) |
MAPTRN - Projects points.
SUPCON is an alternate name for the routine MAPTRN.
CALL MAPTRN (RLAT, RLON, UVAL, VVAL)
#include <ncarg/ncargC.h>
void c_maptrn (float rlat, float rlon, float *uval,
float *vval)
If the point is not projectable, UVAL is returned equal to 1.E12. If the point is projectable, but outside the boundary of the map (as defined by the last call to MAPSET and by the value of the parameter 'EL'), the routine MAPTRN, unlike MAPTRA, still returns its u and v coordinates.
The C-binding argument descriptions are the same as the FORTRAN argument descriptions.
Use the ncargex command to see the following relevant examples: cpex03, mpex09, bnchmk.
To use MAPTRN or c_maptrn, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order.
See the ezmap man page for a description of all EZMAP error messages and/or informational messages.
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Hardcopy: NCAR Graphics Contouring and Mapping Tutorial
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March 1993 | UNIX |