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.TH Natgrid 3NCARG "March 1997-1998" UNIX "NCAR GRAPHICS"
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.SH NAME
Natgrid \-  a package for gridding 2D randomly-spaced data using
a natural neighbor algorithm.  Single precison and double
precision interfaces exist in both Fortran and C.
.SH SYNOPSIS
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FORTRAN single precision
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------------------------
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 NATGRIDS     -  primary function for gridding.
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 NNSETI       -  set INTEGER parameter values.
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 NNGETI       -  retrieve values for INTEGER parameters.
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 NNSETR       -  set REAL parameter values.
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 NNGETR       -  retrieve values for REAL parameters.
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 NNSETC       -  set CHARACTER valued parameters.
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 NNGETC       -  retrieve values for CHARACTER parameters.
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 NNGETSLOPES  -  get slope values, if calculated.
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 NNGETASPECTS -  get aspect values, if calculated.
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 NNPNTINITS   -  initiate single point mode.
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 NNPNTS       -  interpolate at a single point.
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 NNPNTEND     -  terminate single point mode.
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Fortran double precision (not supported on UNICOS):
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--------------------------------------------------
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 NATGRIDD     -  primary function for gridding.
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 NNSETI       -  set INTEGER parameter values.
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 NNGETI       -  retrieve values for INTEGER parameters.
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 NNSETRD      -  set DOUBLE PRECISION parameter values.
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 NNGETRD      -  retrieve DOUBLE PRECISION parameters.
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 NNSETC       -  set CHARACTER valued parameters.
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 NNGETC       -  retrieve values for CHARACTER parameters.
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 NNGETSLOPED  -  get slope values, if calculated.
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 NNGETASPECTD -  get aspect values, if calculated.
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 NNPNTINITD   -  initiate single point mode.
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 NNPNTD       -  interpolate at a single point.
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 NNPNTENDD    -  terminate single point mode.
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C single precision:
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------------------
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 c_natgrids     -  primary function for gridding.
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 c_nnseti       -  set int parameter values.
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 c_nngeti       -  retrieve values for int parameters.
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 c_nnsetr       -  set float parameter values.
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 c_nngetr       -  retrieve values for float parameters.
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 c_nnsetc       -  set char valued parameters.
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 c_nngetc       -  retrieve values for char parameters.
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 c_nngetslopes  -  get slope values, if calculated.
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 c_nngetaspects -  get aspect values, if calculated.
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 c_nnpntinits   -  initiate single point mode.
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 c_nnpnts       -  interpolate at a single point.
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 c_nnpntend     -  terminate single point mode.
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C double precision:
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------------------
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 c_natgridd     -  primary function for gridding.
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 c_nnseti       -  set int parameter values.
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 c_nngeti       -  retrieve values for int parameters.
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 c_nnsetrd      -  set double parameter values.
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 c_nngetrd      -  retrieve values for double parameters.
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 c_nnsetc       -  set char valued parameters.
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 c_nngetc       -  retrieve values for char parameters.
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 c_nngetsloped  -  get slope values, if calculated.
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 c_nngetaspectd -  get aspect values, if calculated.
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 c_nnpntinitd   -  initiate single point mode.
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 c_nnpntd       -  interpolate at a single point.
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 c_nnpntendd    -  terminate single point mode.
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.SH ACCESS 
To use Natgrid entries, load the NCAR Graphics library ngmath.
.SH SEE ALSO
Individual entries, natgrid_params, natgrid_errors.
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Complete documentation for Natgrid is available at URL
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http://ngwww.ucar.edu/ngdoc/ng/ngmath/natgrid/nnhome.html
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An NCL (NCAR Command Language) interface also exists for Natgrid procedures.
.SH COPYRIGHT
Copyright (C) 2000
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University Corporation for Atmospheric Research
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The use of this Software is governed by a License Agreement.