<div dir="ltr"><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Adv</b> <span dir="ltr"><<a href="mailto:advita6@gmail.com">advita6@gmail.com</a>></span><br>Date: Wed, Jan 28, 2015 at 4:13 PM<br>Subject: Sub: mask file for US land/Ocean<br>To: GrADS Users Forum <<a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>><br><br><br><div dir="ltr"><div><div>Hi,<br>I would like to do the same calculation shown below, only over US land region. Could someone help me with mask file ? or else explain me how to use basemap shape file to mask the ocean. Is that possible to do? <br>An example of taking an area average of data only over land, given
a
mask grid: <p>
<code>ave(aave(maskout(p,mask.3(t=1)),x=1,x=72,y=1,y=46),t=1,t=30) </code></p>say result<br><br></div>Thanks,<br></div>Adv<br></div>
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