he time of this writing this encoding has not been tested with the udunits package.)</p>
<p><strong>Vertical (height or depth) dimension:</strong><br />
Coordinate variables representing height or depth must always explicitly include the units attribute; there is no default value for the units attribute. The units attribute will be of character type.</p>
<p>The acceptable units for vertical (depth or height) coordinate variables are</p>
<ul><li>units of pressure as listed in the file udunits.dat. For vertic