<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>Dear all,</span></div><div><span>How can I calculate the perimeter of a specefic contour e.g. 5400 gmp in 500-hpa in km in Grads software?</span></div><div><span>Best Regards</span></div><div><span>kashki</span></div><div></div><div> </div><div>Abdolreza Kashki <var id="yui-ie-cursor"></var><br>Ph.D. Student of Climatology<br>Department of Physical Geography<br>Faculty of Planing & Geography Science <br>University of Isfahan <br>Isfahan, Iran<br>Postcode:81746-73441<br>Tel:+98(311)7933119<br>Fax:+98(311)7932257<br>Cell:+989151731453</div></div></body></html>