<div dir="ltr"><div class="gmail_default" style="font-size:small">Hi Sara,</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">I think you are close.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">The important thing to remember with NCL contouring is that the contouring is always done based on ranges of values, and not at exact values.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">So, if you give it contour levels from 0 to 20 in steps of 1, as you did with this line:</div><div class="gmail_default" style="">
<p style="font-size:small"><span> </span>opts@ContourParameters = <span>(/</span> 0., 20., 1. <span>/)</span></p><p style="font-size:small"><span>Then the first color is going to represent all values <=0.</span></p><p style="font-size:small">The second color is all values > 0 and <= 1.</p><p style="font-size:small">The third color is all values > 1 and <= 2</p><p style="font-size:small">The 21st color is all values > 19 and <= 20</p><p style="font-size:small">The 22nd color (there will be 22 of them since you selected 21 contour levels) will be all values > 20.</p><p style="font-size:small">Your labels seem to indicate that you don't have any 0 values, and that you want to start at 1 and go to 20. If this is the case, then you want:</p><p style="font-size:small">opts@ContourParameters = (/ 1., 19, 1. /)</p><div style="font-size:small">This will give you 19 contour levels, and hence 20 labelbar boxes which you can label from 1 to 20.</div><div style="font-size:small"><br></div><div style="font-size:small">I created a short example in case this helps:</div><div style="font-size:small"><br></div><div style="font-size:small">See conLev_6.ncl at:</div><div style="font-size:small"><br></div><div style=""><a href="http://www.ncl.ucar.edu/Applications/contourLev.shtml#ex6">http://www.ncl.ucar.edu/Applications/contourLev.shtml#ex6</a><br></div><div style=""><br></div><div style="">--Mary</div><div style=""><br></div><div style="">--Mary</div><div style=""><br></div><p style="font-size:small"><br></p></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Mar 6, 2016 at 10:53 PM, Sara Jackson <span dir="ltr"><<a href="mailto:sja@dhigroup.com" target="_blank">sja@dhigroup.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi there,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">I am having trouble with getting the colours on the NCL contour plot to match the corresponding number on the label bar. I have attached my script (which has become a bit messy
while trying to fix this!) and I have attached a copy of the image which is the problem.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">A good way to see the issue is that the sea (red) should be labeled as water which is 17 in the legend, but on the label bar it is labelled as 18.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">The same for the Urban area. Over Singapore the colour should be corresponding to 13 for urban but it is showing 14.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Thus the numbers need to be moved 1 to the right on the colour bar for it to match the legend and the plot. I have tried everything I can see on the internet on trying to try
and solve this but I do not have too much experience with NCL.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Any question please ask.<span style="color:#44546a"><u></u><u></u></span></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#44546a"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#44546a">Thanks,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#44546a">Sara Jackson<u></u><u></u></span></p>
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