<div dir="ltr"><div><div><div>Hi Wei,<br><br></div>I'm not sure where the lines are coming from. Are they present in your pre-tiled image? Are they in the individual tiles. Or is it a Google Map artifact?<br><br></div>I presume they are occurring along tile boundaries? Its curious that in the image you sent, the double-lines don't cut across all contour levels?!<br><br></div>Rick<br><br><div><div><br><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jan 12, 2016 at 12:12 PM, Wei Huang <span dir="ltr"><<a href="mailto:whuang@univ-wea.com" target="_blank">whuang@univ-wea.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I am plotting a transparent image (of precipitation) with png file, then slice it to (for example 16, or 64) tiles and then<br>
Put these tiled images on top of Google Map. As you can see, there are two vertical lines (sometimes none, and sometimes one).<br>
<br>
Is there any way we can get rid of those lines?<br>
<br>
Here are the major resource parameters:<br>
<br>
res = True<br>
res@mpProjection = "Mercator" ; choose projection<br>
res@mpGridAndLimbOn = False ; turn on lat/lon lines<br>
res@mpPerimOn = False ; turn off box around plot<br>
res@mpOutlineOn = False<br>
res@mpFillOn = False<br>
res@mpLimitMode = "LatLon"<br>
res@mpMinLatF = -85.0511<br>
res@mpMaxLatF = 85.0511<br>
res@mpMinLonF = -180.0<br>
res@mpMaxLonF = 180.0<br>
<br>
res@vpXF = 0.0<br>
res@vpYF = 1.0<br>
res@vpWidthF = 1.0<br>
res@vpHeightF = 1.0<br>
<br>
res@gsnAddCyclic = True<br>
<br>
res@cnFillOn = True ; color plot desired<br>
res@cnLineLabelsOn = False ; turn off contour lines<br>
res@cnLinesOn = False<br>
res@cnFillMode = "AreaFill"<br>
res@cnLevelSelectionMode = "ExplicitLevels" ; set explicit contour levels<br>
res@cnLevels := levels<br>
res@cnFillColors := colors<br>
res@cnConstFEnableFill = True ; so zoomed in that filed is const<br>
res@cnConstFLabelOn = False<br>
<br>
res@lbLabelBarOn = False<br>
<br>
Thanks,<br>
<br>
Wei Huang<br>
<a href="mailto:whuang@univ-wea.com">whuang@univ-wea.com</a><br>
<br>
<br>
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<br></blockquote></div><br></div>