<div dir="ltr"><br><div class="gmail_quote"><span style="font-family:arial,helvetica,sans-serif">Hello, </span><br><div dir="ltr"><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">I have a file with observations for the entire globe for one hour period. </font></div><div><div><font color="#000000" face="arial, helvetica, sans-serif">Here are few lines from my txt (observations) files. The highlighted values are for lat and lon: </font></div><div style="font-size:12.800000190734863px"><span style="color:rgb(0,0,0);font-family:Menlo;font-size:11px">2010/08/28,04:00:00.356732, </span><span style="color:rgb(0,0,0);font-family:Menlo;font-size:11px;background-color:rgb(255,255,0)">11<wbr>.7047, 133.9177</span><span style="color:rgb(0,0,0);font-family:Menlo;font-size:11px">,  4.8,  5</span><br></div><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0);min-height:13px">2010/08/28,04:00:00.629722, 36.7353,  52.1856, 26.8,  7<br><span style="font-variant-ligatures:no-common-ligatures"></span></p><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span style="font-variant-ligatures:no-common-ligatures">2010/08/28,04:00:00.559602, 36.8155,  52.2482,  3.3,  5</span></p><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span style="font-variant-ligatures:no-common-ligatures">2010/08/28,04:00:00.922721,  4.8667, 105.7474,  8.3,  7</span></p><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span style="font-variant-ligatures:no-common-ligatures">2010/08/28,04:00:00.130999, 22.7165,-105.1758, 24.9,  5</span></p><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span style="font-variant-ligatures:no-common-ligatures">2010/08/28,04:00:00.400279, 11.7329, 133.9220, 16.3,  9</span></p><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span style="font-variant-ligatures:no-common-ligatures">2010/08/28,04:00:01.330873, 21.6459,-105.0242,  7.3,  5</span></p><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span style="font-variant-ligatures:no-common-ligatures">2010/08/28,04:00:01.409443, 28.4564, -90.7360,  9.7,  5</span></p><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span style="font-variant-ligatures:no-common-ligatures"><br></span></p><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span style="font-variant-ligatures:no-common-ligatures"><br></span></p><p style="margin:0px;font-stretch:normal;line-height:normal"><font face="arial, helvetica, sans-serif"><span style="color:rgb(0,0,0);font-variant-ligatures:no-common-ligatures">I plotted these observations using </span>ncl function gsn_add_polymarker for the domain I am interested in lat and lon. </font></p><p style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-size:12.800000190734863px"><font face="arial, helvetica, sans-serif"><br></font></span></p><p style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-size:12.800000190734863px"><font face="arial, helvetica, sans-serif">I will like to now how to transform the lat and lon to polar coordinates for the domain I am interested.</font></span></p><p style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-size:12.800000190734863px"><font face="arial, helvetica, sans-serif"><br></font></span></p><p style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-size:12.800000190734863px"><font face="arial, helvetica, sans-serif">Does anyone have an idea of how to to this?</font></span></p><p style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-size:12.800000190734863px"><font face="arial, helvetica, sans-serif"><br></font></span></p><p style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-size:12.800000190734863px"><font face="arial, helvetica, sans-serif">Thanks! </font></span></p><p style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span style="font-variant-ligatures:no-common-ligatures"><br></span></p></div></div>
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