<div dir="ltr">Hi NCL user,<div>I have been trying to add a polyline to the map, but ended up drawing nothing. <br><div>





<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">Mask = </span><span class="gmail-s2" style="font-variant-ligatures:no-common-ligatures;color:rgb(52,187,199)">where</span><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">(masktracer</span><span class="gmail-s3" style="font-variant-ligatures:no-common-ligatures;color:rgb(206,121,36)">.eq.</span><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">j, </span><span class="gmail-s4" style="font-variant-ligatures:no-common-ligatures;color:rgb(195,55,32)">1</span><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">, </span><span class="gmail-s4" style="font-variant-ligatures:no-common-ligatures;color:rgb(195,55,32)">0</span><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures">)<span class="gmail-Apple-converted-space"> </span></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="gmail-Apple-converted-space">I would like to draw a polyline wherever the Mask is equal to 1. I would appreciate any recommendation to help. </span></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="gmail-Apple-converted-space"><br></span></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="gmail-Apple-converted-space"><br></span></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="gmail-Apple-converted-space">Thanks</span></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="gmail-Apple-converted-space">Dale</span></span></p></div></div></div>