<div dir="ltr">Zilore,<div><br></div><div>Please look at the first example on the Station Data example page:</div><div><a href="http://www.ncl.ucar.edu/Applications/station.shtml" target="_blank">http://www.ncl.ucar.edu/Applications/station.shtml</a><br>
</div><div><br></div><div>You said that you wanted to plot contours. This simple example plots contours WITHOUT first putting data on a regular grid. It uses a triangular mesh plotting technique. For irregular coordinates, this technique will actually make a more accurate contour map than one made from a regular grid.</div>
<div><br></div><div>Will this example meet your needs? My apologies if this was already discussed previously.</div><div><br></div><div>--Dave</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sat, Jul 26, 2014 at 4:40 PM, zilore mumba <span dir="ltr"><<a href="mailto:zmumba@yahoo.com" target="_blank">zmumba@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:12pt">
<div>I have x,y,z data on an irregularly spaced geographical grid, which I want to put on a regular grid to be able to plot contours.</div><div>My data is below (id, long., lat., rainfall).</div><div>01 28.92 -2.47 286.5<br>
02 29.02 -2.68 168.8<br>03 29.25 -1.67 243.4<br>04 29.42 -2.07 204.9<br>05 29.55 -1.58 286.9<br>06 29.57 -2.48 230.<br>07 29.6 -1.5 177.5<br>08 29.72 -2.18 290.<br>09 30.05 -1.6 206.5<br>10 30.13 -1.97 178.1<br>
11 30.5 -2.15 156.7</div><div style="color:rgb(0,0,0);font-size:16px;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;background-color:transparent;font-style:normal">My sincere apologies because this is a question I already asked more than 6 months ago and I still have not found a solution.</div>
<div style="color:rgb(0,0,0);font-size:16px;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;background-color:transparent;font-style:normal">The question is: Is it possible to do what I want to do in ncl?</div>
<div style="color:rgb(0,0,0);font-size:16px;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;background-color:transparent;font-style:normal">1. I have tried 2dgrid.ncl which seems to but am not able to
figure out how to write output to file, and the z values all seem to be above 370 (well above what I have in my file).</div><div style="color:rgb(0,0,0);font-size:16px;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;background-color:transparent;font-style:normal">
2. I have try the Fortran single precision linear interpolation at <a href="http://w3.pppl.gov/ngdoc/ng/ngmath/natgrid/examples.html" target="_blank">Natgrid Examples</a> and run the fortran program with ncargf77 filename I get the errors below:</div>
<div style="color:rgb(0,0,0);font-size:16px;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;background-color:transparent;font-style:normal">Advice will be appreciated.</div><div style="color:rgb(0,0,0);font-size:16px;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;background-color:transparent;font-style:normal">
<br></div><div style="color:rgb(0,0,0);font-size:16px;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;background-color:transparent;font-style:normal">ncargf77 natgrid.f<br>gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O natgrid.f -L/usr/local/lib -L/usr/X11R6/lib64 -lncarg -lncarg_gks -lncarg_c -lX11 -lXext -lcairo -lfontconfig -lpixman-1 -lfreetype -lexpat -lpng -lz -liconv -lXrender -lbz2<br>
/usr/bin/ld: cannot find -lX11<br>/usr/bin/ld: cannot find -lXext<br>/usr/bin/ld: cannot find -lcairo<br>/usr/bin/ld: cannot find -lfontconfig<br>/usr/bin/ld: cannot find -lpixman-1<br>/usr/bin/ld: cannot find -lfreetype<br>
/usr/bin/ld: cannot find -lexpat<br>/usr/bin/ld: cannot find -liconv<br>/usr/bin/ld: cannot find -lXrender<br>/usr/bin/ld: cannot find -lbz2<br>collect2: error: ld returned 1 exit status<br><br></div><div style="width:450px;font-family:'Georgia','Times','Times New Roman','serif';margin-top:5px;margin-bottom:5px">
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</div></td></tr><tr><td rowspan="5" style="width:1px;background-color:#e5e5e5;font-size:1pt;border-collapse:collapse"><div style="width:1px;background-color:#e5e5e5;font-size:1pt"> </div></td><td rowspan="5" style="width:14px;background-color:#ffffff;font-size:0pt;border-collapse:collapse">
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</div></td><td rowspan="5" style="width:20px;background-color:#ffffff;font-size:0pt;border-collapse:collapse"><div style="width:20px;background-color:#ffffff;font-size:20pt"> </div></td><td rowspan="5" style="width:1px;background-color:#e5e5e5;font-size:1pt;border-collapse:collapse" width="1">
<div style="width:1px;background-color:#e5e5e5;font-size:1pt"> </div></td></tr><tr><td colspan="2" style="width:100%;vertical-align:middle;font-family:'Georgia','Times','Times New Roman','serif'">
<div style="line-height:16.5px;background-color:#ffffff;width:414px"><div style="word-wrap:break-word;word-break:break-all"><span></span><span></span><a href="http://w3.pppl.gov/ngdoc/ng/ngmath/natgrid/examples.html" style="text-decoration:none!important;color:#000000!important;line-height:100%;font-size:18px;display:block" target="_blank"><span style="margin:0;font-weight:normal;margin-bottom:3px;font-size:18px;line-height:21px;max-height:43px;color:#000000;overflow:hidden!important;display:inline-block">Natgrid Examples</span></a><div style="font-size:13px;line-height:20px;color:#999999;max-height:81px;font-family:'Georgia','Times','Times New Roman','serif';overflow:hidden">
Natgrid examples Overview
This module contains source codes for all of the examples
referenced by the other modules in the documentation. Links to all
of the example plots are provided. </div></div></div></td></tr><tr><td colspan="2" style="height:6px;background-color:#ffffff;font-size:0pt;border-collapse:collapse"><div style="min-height:6px;background-color:#ffffff;font-size:6pt">
</div></td></tr><tr><td style="vertical-align:middle;font-family:'Arial','Helvetica Neue','Helvetica','sans-serif'"><div style="font-size:0pt"><a href="http://w3.pppl.gov/ngdoc/ng/ngmath/natgrid/examples.html" style="color:black;text-decoration:none!important" target="_blank"><span style="display:inline-block;line-height:11px;max-width:314px;min-width:254px;overflow:hidden;max-height:13px;word-break:break-all"><span style="vertical-align:middle;font-size:9px;line-height:11px;color:#999999">View on <span style="font-weight:bold">w3.pppl.gov</span></span></span></a></div>
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<span style="vertical-align:middle;font-size:9px;line-height:11px;color:#999999">Preview by Yahoo</span></div></td></tr><tr><td colspan="2" style="height:9px;background-color:#ffffff;font-size:0pt;border-collapse:collapse">
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