Retrieve the aspect at a specified coordinate.
CALL NNGETASPECTS (I,J,ASPECT,IER)
(Integer, Input) - A subscript indexing the first dimensioned variable in the output grid of the most recent call to NATGRIDS.
(Integer, Input) - A subscript indexing the second dimensioned variable in the output grid of the most recent call to NATGRIDS.
(Real, Output) - The slope at the grid point Z(I,J), where Z is the output grid in the most recent call to NATGRIDS.
(Integer, Output) - An error return value. If IER is returned as 0, then no errors were detected. If IER is non-zero, then refer to the man page for natgrid_errors for details.
To use NNGETASPECTS, load the NCAR Graphics library ngmath.
natgrids, natgrid_parameters.
Complete documentation for Natgrid is available at URL
http://ngwww.ucar.edu/ngdoc/ng/ngmath/natgrid/nnhome.html
Copyright (C) 2000
University Corporation for Atmospheric Research
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