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GrADS users:<br>
<br>
I am attempting to convert several lambert conformal grids of
meteorological data to GrADS format. However the documentation has
conflicting information on the page titled "Use PDEF For Displaying
Pre-Projected Data With GrADS" at
<a class="moz-txt-link-freetext" href="http://grads.iges.org/grads/gadoc/pdef.html">http://grads.iges.org/grads/gadoc/pdef.html</a> <br>
<br>
Under the table for PDEF syntax for LCC grids it says "The Lambert
Conformal projection (lcc) was implemented for use with data from the
U.S. Navy's limited area model NORAPS.<i><b>Wind rotation has not been
implemented!!</b>! Use only for scalar fields." </i>However, further
down under the section tittled<strong>, "</strong>The PDEF BILIN
option" it says "But this only works for a small set of well-defined
native grids. GrADS will generate these three internal grids
automatically for polar stereographic, <b>lamber conformal</b>, and
some eta grids." <br>
<br>
So, my question is if I specify any LCC grid in the PDEF line, do I
need to first convert all my U and V winds to true north? <br>
<br>
Thanks.<br>
<br>
Glenn Rolph<br>
NOAA ARL<br>
<span class="item12bold"><strong></strong></span>
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