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Dear Dave,
<div class=""> Thanks very much for the information. It is helpful. I’ll try to search the published lat&lon coordinates.</div>
<div class=""> Have a nice day!</div>
<div class="">Best Regards,</div>
<div class="">Xiao<br class="">
<div>
<blockquote type="cite" class="">
<div class="">On 16 Nov 2016, at 19:16, Dave Allured - NOAA Affiliate <<a href="mailto:dave.allured@noaa.gov" class="">dave.allured@noaa.gov</a>> wrote:</div>
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<div class="">
<div dir="ltr" class=""><span style="font-family:arial;font-size:14px" class="">Xiaofeng Li,</span>
<div class=""><font face="arial" class=""><br class="">
</font></div>
<div class=""><font face="arial" class="">You have BNG coordinates on an even 1-Km grid. I do not know of any internal NCL solution.</font></div>
<div class=""><font face="arial" class=""><br class="">
</font></div>
<div class=""><font face="arial" class="">The </font><span style="font-family:arial" class="">best solution is to find published latitude and longitude coordinates for the BNG 1-Km grid from an official source. These should be in the form of 2-D equivalent
arrays or tables, lats(x,y) and lons(x,y). </span><span style="font-family:arial" class="">NCL can read 2-D equivalent arrays in many different formats, so the exact format is not important. And of course, you can easily take a subset out of a larger reference
grid, or a higher resolution grid.</span></div>
<div class=""><span style="font-family:arial" class=""><br class="">
</span></div>
<div class=""><span style="font-family:arial" class="">You will need to find these published coordinates for yourself. I am not sure whether the 1-Km coordinates are published, but there is an excellent chance that they are out there somewhere. There is also
published software that can generate the coordinates for you, but that is more difficult than just finding and downloading the 1-km grid coordinates from an official source.</span></div>
<div class=""><span style="font-family:arial" class=""><br class="">
</span></div>
<div class=""><span style="font-family:arial" class="">When you have </span><span style="font-family:arial" class="">lats(x,y) and lons(x,y), you can read them into NCL and use them to geolocate your BNG data grids for plotting and other applications. HTH.</span></div>
<div class=""><span style="font-family:arial" class=""><br class="">
</span></div>
<div class=""><span style="font-family:arial" class="">--Dave</span></div>
<div class=""><span style="font-family:arial" class=""><br class="">
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<div class="gmail_extra"><br class="">
<div class="gmail_quote">On Wed, Nov 16, 2016 at 7:04 AM, Xiaofeng Li <span dir="ltr" class="">
<<a href="mailto:Xiaofeng.Li@newcastle.ac.uk" target="_blank" class="">Xiaofeng.Li@newcastle.ac.uk</a>></span> wrote:<br class="">
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<div style="font-family:arial;font-size:14px;background-color:rgb(255,255,255)" class="">
Dear all,</div>
<div style="font-family:arial;font-size:14px;background-color:rgb(255,255,255)" class="">
<br class="">
</div>
<div style="font-family:arial;font-size:14px;background-color:rgb(255,255,255)" class="">
Is there any function in NCL to covert the British National Grid (BNG) to the normal latitude and longitude? see the attach NC data,”<a href="http://test.nc/" target="_blank" class="">test.nc</a>".</div>
<div style="font-family:arial;font-size:14px;background-color:rgb(255,255,255)" class="">
I’ve checked this web <a href="http://www.ncl.ucar.edu/Document/Graphics/contour_grids.shtml" target="_blank" class="">http://www.ncl.ucar.edu/Do<wbr class="">cument/Graphics/contour_grids.<wbr class="">shtml</a>, and it seems that the BNG is not supported
by the NCL plotting.</div>
<div style="font-family:arial;font-size:14px;background-color:rgb(255,255,255)" class="">
Any information is appreciable.</div>
<div style="font-family:arial;font-size:14px;background-color:rgb(255,255,255)" class="">
<br class="">
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<div style="font-family:arial;font-size:14px;background-color:rgb(255,255,255)" class="">
Regards,</div>
<div style="font-family:arial;font-size:14px;background-color:rgb(255,255,255)" class="">
Xiaofeng Li</div>
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