<div dir="ltr">Hello,<div><br></div><div>How do I take a slice to see only the surface level? Also, the missing value given in the ncdump is:</div><div><br></div><div><p style="margin:0px;font-size:11px;font-family:Menlo">
agm:missing_value = -1.e+20f ;</p><p style="margin:0px;font-size:11px;font-family:Menlo">agm:_FillValue = -1.e+20f ;</p><p style="margin:0px;font-size:11px;font-family:Menlo"><br></p><p style="margin:0px"><font face="arial, helvetica, sans-serif">Is this the value I would use for undef and if so what does the f stand for?</font></p>
<p style="margin:0px"><br></p><p style="margin:0px"><font face="arial, helvetica, sans-serif">Thanks,</font></p><p style="margin:0px"><font face="arial, helvetica, sans-serif"><br></font></p><p style="margin:0px"><font face="arial, helvetica, sans-serif">David</font></p>
<p style="margin:0px;font-size:11px;font-family:Menlo"><br></p></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Jul 25, 2014 at 12:34 AM, Andrew Friedman <span dir="ltr">&lt;<a href="mailto:andfried@berkeley.edu" target="_blank">andfried@berkeley.edu</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi David,<br>
<br>
A few ideas:<br>
<br>
Can you try to take a slice of your dataset at just the surface level to see if it displays? That could help isolate if it has something to do with the vertical axis. I notice that some of your variables are only defined at 1 level.<br>

<br>
Also, could it be a problem that your undef value is different than the missing value and fill value attributes?<br>
<br>
Andrew<br>
<div><div class="h5"><br>
On Jul 24, 2014, at 9:26 PM, David Stanfel &lt;<a href="mailto:dstanfel@ualberta.ca">dstanfel@ualberta.ca</a>&gt; wrote:<br>
<br>
&gt; Hello,<br>
&gt;<br>
&gt; I decided to try a different file. Here is the ncdump -c of said file:<br>
&gt;<br>
&gt; dstanfel:bin ninjawarrior343$ ncdump -c <a href="http://19800101.ocean_neutral.nc" target="_blank">19800101.ocean_neutral.nc</a><br>
&gt; netcdf \19800101.ocean_neutral {<br>
&gt; dimensions:<br>
&gt;       xt_ocean = 24 ;<br>
&gt;       yt_ocean = 35 ;<br>
&gt;       Time = UNLIMITED ; // (1 currently)<br>
&gt;       nv = 2 ;<br>
&gt;       st_ocean = 18 ;<br>
&gt;       st_edges_ocean = 19 ;<br>
&gt; variables:<br>
&gt;       double xt_ocean(xt_ocean) ;<br>
&gt;               xt_ocean:long_name = &quot;tcell longitude&quot; ;<br>
&gt;               xt_ocean:units = &quot;degrees_E&quot; ;<br>
&gt;               xt_ocean:cartesian_axis = &quot;X&quot; ;<br>
&gt;       double yt_ocean(yt_ocean) ;<br>
&gt;               yt_ocean:long_name = &quot;tcell latitude&quot; ;<br>
&gt;               yt_ocean:units = &quot;degrees_N&quot; ;<br>
&gt;               yt_ocean:cartesian_axis = &quot;Y&quot; ;<br>
&gt;       double Time(Time) ;<br>
&gt;               Time:long_name = &quot;Time&quot; ;<br>
&gt;               Time:units = &quot;days since 1980-01-01 00:00:00&quot; ;<br>
&gt;               Time:cartesian_axis = &quot;T&quot; ;<br>
&gt;               Time:calendar_type = &quot;NOLEAP&quot; ;<br>
&gt;               Time:calendar = &quot;NOLEAP&quot; ;<br>
&gt;               Time:bounds = &quot;Time_bounds&quot; ;<br>
&gt;       double nv(nv) ;<br>
&gt;               nv:long_name = &quot;vertex number&quot; ;<br>
&gt;               nv:units = &quot;none&quot; ;<br>
&gt;               nv:cartesian_axis = &quot;N&quot; ;<br>
&gt;       double st_ocean(st_ocean) ;<br>
&gt;               st_ocean:long_name = &quot;tcell pstar&quot; ;<br>
&gt;               st_ocean:units = &quot;dbars&quot; ;<br>
&gt;               st_ocean:cartesian_axis = &quot;Z&quot; ;<br>
&gt;               st_ocean:positive = &quot;down&quot; ;<br>
&gt;               st_ocean:edges = &quot;st_edges_ocean&quot; ;<br>
&gt;       double st_edges_ocean(st_edges_ocean) ;<br>
&gt;               st_edges_ocean:long_name = &quot;tcell pstar edges&quot; ;<br>
&gt;               st_edges_ocean:units = &quot;dbars&quot; ;<br>
&gt;               st_edges_ocean:cartesian_axis = &quot;Z&quot; ;<br>
&gt;               st_edges_ocean:positive = &quot;down&quot; ;<br>
&gt;       float agm(Time, yt_ocean, xt_ocean) ;<br>
&gt;               agm:long_name = &quot;GM diffusivity at surface&quot; ;<br>
&gt;               agm:units = &quot;m^2/sec&quot; ;<br>
&gt;               agm:valid_range = -10.f, 1.e+10f ;<br>
&gt;               agm:missing_value = -1.e+20f ;<br>
&gt;               agm:_FillValue = -1.e+20f ;<br>
&gt;               agm:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               agm:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               agm:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;               agm:standard_name = &quot;ocean_tracer_bolus_laplacian_diffusivity&quot; ;<br>
&gt;       float rossby(Time, yt_ocean, xt_ocean) ;<br>
&gt;               rossby:long_name = &quot;Rossby radius used in neutral physics&quot; ;<br>
&gt;               rossby:units = &quot;m&quot; ;<br>
&gt;               rossby:valid_range = -10.f, 1.e+10f ;<br>
&gt;               rossby:missing_value = -1.e+20f ;<br>
&gt;               rossby:_FillValue = -1.e+20f ;<br>
&gt;               rossby:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               rossby:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               rossby:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;       float slope31(Time, st_ocean, yt_ocean, xt_ocean) ;<br>
&gt;               slope31:long_name = &quot;neutral slope -(rho_x/rho_z)&quot; ;<br>
&gt;               slope31:units = &quot;dimensionless&quot; ;<br>
&gt;               slope31:valid_range = -1.e+10f, 1.e+10f ;<br>
&gt;               slope31:missing_value = -1.e+20f ;<br>
&gt;               slope31:_FillValue = -1.e+20f ;<br>
&gt;               slope31:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               slope31:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               slope31:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;       float slope32(Time, st_ocean, yt_ocean, xt_ocean) ;<br>
&gt;               slope32:long_name = &quot;neutral slope -(rho_y/rho_z)&quot; ;<br>
&gt;               slope32:units = &quot;dimensionless&quot; ;<br>
&gt;               slope32:valid_range = -1.e+10f, 1.e+10f ;<br>
&gt;               slope32:missing_value = -1.e+20f ;<br>
&gt;               slope32:_FillValue = -1.e+20f ;<br>
&gt;               slope32:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               slope32:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               slope32:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;       double average_T1(Time) ;<br>
&gt;               average_T1:long_name = &quot;Start time for average period&quot; ;<br>
&gt;               average_T1:units = &quot;days since 1980-01-01 00:00:00&quot; ;<br>
&gt;               average_T1:missing_value = 1.e+20 ;<br>
&gt;               average_T1:_FillValue = 1.e+20 ;<br>
&gt;       double average_T2(Time) ;<br>
&gt;               average_T2:long_name = &quot;End time for average period&quot; ;<br>
&gt;               average_T2:units = &quot;days since 1980-01-01 00:00:00&quot; ;<br>
&gt;               average_T2:missing_value = 1.e+20 ;<br>
&gt;               average_T2:_FillValue = 1.e+20 ;<br>
&gt;       double average_DT(Time) ;<br>
&gt;               average_DT:long_name = &quot;Length of average period&quot; ;<br>
&gt;               average_DT:units = &quot;days&quot; ;<br>
&gt;               average_DT:missing_value = 1.e+20 ;<br>
&gt;               average_DT:_FillValue = 1.e+20 ;<br>
&gt;       double Time_bounds(Time, nv) ;<br>
&gt;               Time_bounds:long_name = &quot;Time axis boundaries&quot; ;<br>
&gt;               Time_bounds:units = &quot;days&quot; ;<br>
&gt;               Time_bounds:missing_value = 1.e+20 ;<br>
&gt;               Time_bounds:_FillValue = 1.e+20 ;<br>
&gt;<br>
&gt; // global attributes:<br>
&gt;               :filename = &quot;<a href="http://ocean_neutral.nc" target="_blank">ocean_neutral.nc</a>&quot; ;<br>
&gt;               :title = &quot;MOM4 box&quot; ;<br>
&gt;               :grid_type = &quot;regular&quot; ;<br>
&gt;               :grid_tile = &quot;N/A&quot; ;<br>
&gt; data:<br>
&gt;<br>
&gt;  xt_ocean = 1.25, 3.75, 6.25, 8.75, 11.25, 13.75, 16.25, 18.75, 21.25, 23.75,<br>
&gt;     26.25, 28.75, 31.25, 33.75, 36.25, 38.75, 41.25, 43.75, 46.25, 48.75,<br>
&gt;     51.25, 53.75, 56.25, 58.75 ;<br>
&gt;<br>
&gt;  yt_ocean = 1.25, 3.7488100528717, 6.2393012046814, 8.71919345855713,<br>
&gt;     11.1815176010132, 13.6242818832397, 16.0408229827881, 18.4296073913574,<br>
&gt;     20.784387588501, 23.1042194366455, 25.3833503723145, 27.6215190887451,<br>
&gt;     29.813497543335, 31.9597606658936, 34.0555992126465, 36.1022338867188,<br>
&gt;     38.0954322814941, 40.0371551513672, 41.9235687255859, 43.7573394775391,<br>
&gt;     45.5349464416504, 47.259708404541, 48.9283294677734, 50.5447235107422,<br>
&gt;     52.1057090759277, 53.6157531738281, 55.0716934204102, 56.4785079956055,<br>
&gt;     57.8329429626465, 59.1404571533203, 60.3976211547852, 61.6103477478027,<br>
&gt;     62.7749481201172, 63.8977813720703, 64.9748153686523 ;<br>
&gt;<br>
&gt;  Time = 2 ;<br>
&gt;<br>
&gt;  nv = 1, 2 ;<br>
&gt;<br>
&gt;  st_ocean = 17.75025, 53.25075, 88.75125, 124.25175, 159.75225, 195.25275,<br>
&gt;     230.75325, 266.25375, 314.34159289856, 399.171716592407,<br>
&gt;     541.922400494385, 759.079548358154, 1061.10117883301, 1451.56990550537,<br>
&gt;     1926.90292906494, 2476.64250944824, 3084.30280480957, 3728.70522619629 ;<br>
&gt;<br>
&gt;  st_edges_ocean = 0, 35.5005, 71.001, 106.5015, 142.002, 177.5025, 213.003,<br>
&gt;     248.5035, 290.29765597229, 356.756654745483, 470.547043066406,<br>
&gt;     650.50097442627, 910.090332641602, 1256.33548026123, 1689.23641728516,<br>
&gt;     2201.77290498047, 2780.47265712891, 3406.50401550293, 4057.20024763184<br>
&gt;<br>
&gt; I wrote a .ctl file:<br>
&gt;<br>
&gt; DSET ^<a href="http://19800101.ocean_neutral.nc" target="_blank">19800101.ocean_neutral.nc</a><br>
&gt; UNDEF -9.99e8 missing_value<br>
&gt; DTYPE netcdf<br>
&gt; CACHESIZE 100000<br>
&gt; TITLE Sample Model Output<br>
&gt; XDEF 24 LINEAR  1.25   2.5<br>
&gt; YDEF 35 levels  1.25, 3.7488100528717, 6.2393012046814, 8.71919345855713,<br>
&gt;     11.1815176010132, 13.6242818832397, 16.0408229827881, 18.4296073913574,<br>
&gt;     20.784387588501, 23.1042194366455, 25.3833503723145, 27.6215190887451,<br>
&gt;     29.813497543335, 31.9597606658936, 34.0555992126465, 36.1022338867188,<br>
&gt;     38.0954322814941, 40.0371551513672, 41.9235687255859, 43.7573394775391,<br>
&gt;     45.5349464416504, 47.259708404541, 48.9283294677734, 50.5447235107422,<br>
&gt;     52.1057090759277, 53.6157531738281, 55.0716934204102, 56.4785079956055,<br>
&gt;     57.8329429626465, 59.1404571533203, 60.3976211547852, 61.6103477478027,<br>
&gt;     62.7749481201172, 63.8977813720703, 64.9748153686523<br>
&gt; ZDEF 18 levels  17.75025, 53.25075, 88.75125, 124.25175, 159.75225, 195.25275, 230.75327, 266.25375, 314.34159289856, 399.171716592407, 541.922400494385, 759.079548358154, 1061.10117883301, 1451.56990550537, 1926.90292906494, 2476.64250944824, 3084.30280480957, 3728.70522619629<br>

&gt; TDEF 1 LINEAR 01JAN0001 1mo<br>
&gt; VARS 4<br>
&gt; agm    0  t,y,x  GM diffusivity at surface (m^2/sec)<br>
&gt; rossby 0  t,y,x  Rossby radius used in neutral physics (m)<br>
&gt; slope31 18 t,z,y,x Neutral slope -(rho_x/rho_z)<br>
&gt; slope32 18 t,z,y,x Neutral slope -(rho_y/rho_z)<br>
&gt; ENDVARS<br>
&gt;<br>
&gt; When trying to display the variables, I get this error:<br>
&gt;<br>
&gt; ga-&gt; d agm<br>
&gt; Cannot contour grid - all undefined values<br>
&gt; ga-&gt; d rossby<br>
&gt; Cannot contour grid - all undefined values<br>
&gt; ga-&gt; d slope31<br>
&gt; Cannot contour grid - all undefined values<br>
&gt; ga-&gt;<br>
&gt;<br>
&gt; What could be going wrong here?<br>
&gt;<br>
&gt; Thanks,<br>
&gt;<br>
&gt; David<br>
&gt;<br>
&gt;<br>
&gt; On Wed, Jul 23, 2014 at 11:23 AM, David Stanfel &lt;<a href="mailto:dstanfel@ualberta.ca">dstanfel@ualberta.ca</a>&gt; wrote:<br>
&gt; Also, how do you determine the CACHESIZE?<br>
&gt;<br>
&gt; Thanks,<br>
&gt;<br>
&gt; David<br>
&gt;<br>
&gt;<br>
&gt; On Tue, Jul 22, 2014 at 11:05 PM, David Stanfel &lt;<a href="mailto:dstanfel@ualberta.ca">dstanfel@ualberta.ca</a>&gt; wrote:<br>
&gt; Hello,<br>
&gt;<br>
&gt; I just ran a climate model which produced some .nc files. I am having trouble writing the .ctl file to read said .nc files. Here is the ncdump -c for one of the files I am trying to read:<br>
&gt;<br>
&gt; dstanfel:bin ninjawarrior343$ ncdump -c <a href="http://19800101.ocean_layer.nc" target="_blank">19800101.ocean_layer.nc</a><br>
&gt; netcdf \19800101.ocean_layer {<br>
&gt; dimensions:<br>
&gt;       grid_xt_ocean = 24 ;<br>
&gt;       grid_yt_ocean = 35 ;<br>
&gt;       theta = 100 ;<br>
&gt;       theta_edges = 101 ;<br>
&gt;       Time = UNLIMITED ; // (1 currently)<br>
&gt;       nv = 2 ;<br>
&gt;       xt_ocean = 24 ;<br>
&gt;       yt_ocean = 35 ;<br>
&gt;       st_ocean = 18 ;<br>
&gt;       st_edges_ocean = 19 ;<br>
&gt;       potrho = 100 ;<br>
&gt;       potrho_edges = 101 ;<br>
&gt; variables:<br>
&gt;       double grid_xt_ocean(grid_xt_ocean) ;<br>
&gt;               grid_xt_ocean:long_name = &quot;tcell longitude&quot; ;<br>
&gt;               grid_xt_ocean:units = &quot;degrees_E&quot; ;<br>
&gt;               grid_xt_ocean:cartesian_axis = &quot;X&quot; ;<br>
&gt;       double grid_yt_ocean(grid_yt_ocean) ;<br>
&gt;               grid_yt_ocean:long_name = &quot;tcell latitude&quot; ;<br>
&gt;               grid_yt_ocean:units = &quot;degrees_N&quot; ;<br>
&gt;               grid_yt_ocean:cartesian_axis = &quot;Y&quot; ;<br>
&gt;       double theta(theta) ;<br>
&gt;               theta:long_name = &quot;potential or conservative temperature&quot; ;<br>
&gt;               theta:units = &quot;C&quot; ;<br>
&gt;               theta:cartesian_axis = &quot;Z&quot; ;<br>
&gt;               theta:positive = &quot;up&quot; ;<br>
&gt;               theta:edges = &quot;theta_edges&quot; ;<br>
&gt;       double theta_edges(theta_edges) ;<br>
&gt;               theta_edges:long_name = &quot;potential or conservative temperature edges&quot; ;<br>
&gt;               theta_edges:units = &quot;C&quot; ;<br>
&gt;               theta_edges:cartesian_axis = &quot;Z&quot; ;<br>
&gt;               theta_edges:positive = &quot;up&quot; ;<br>
&gt;       double Time(Time) ;<br>
&gt;               Time:long_name = &quot;Time&quot; ;<br>
&gt;               Time:units = &quot;days since 1980-01-01 00:00:00&quot; ;<br>
&gt;               Time:cartesian_axis = &quot;T&quot; ;<br>
&gt;               Time:calendar_type = &quot;NOLEAP&quot; ;<br>
&gt;               Time:calendar = &quot;NOLEAP&quot; ;<br>
&gt;               Time:bounds = &quot;Time_bounds&quot; ;<br>
&gt;       double nv(nv) ;<br>
&gt;               nv:long_name = &quot;vertex number&quot; ;<br>
&gt;               nv:units = &quot;none&quot; ;<br>
&gt;               nv:cartesian_axis = &quot;N&quot; ;<br>
&gt;       double xt_ocean(xt_ocean) ;<br>
&gt;               xt_ocean:long_name = &quot;tcell longitude&quot; ;<br>
&gt;               xt_ocean:units = &quot;degrees_E&quot; ;<br>
&gt;               xt_ocean:cartesian_axis = &quot;X&quot; ;<br>
&gt;       double yt_ocean(yt_ocean) ;<br>
&gt;               yt_ocean:long_name = &quot;tcell latitude&quot; ;<br>
&gt;               yt_ocean:units = &quot;degrees_N&quot; ;<br>
&gt;               yt_ocean:cartesian_axis = &quot;Y&quot; ;<br>
&gt;       double st_ocean(st_ocean) ;<br>
&gt;               st_ocean:long_name = &quot;tcell pstar&quot; ;<br>
&gt;               st_ocean:units = &quot;dbars&quot; ;<br>
&gt;               st_ocean:cartesian_axis = &quot;Z&quot; ;<br>
&gt;               st_ocean:positive = &quot;down&quot; ;<br>
&gt;               st_ocean:edges = &quot;st_edges_ocean&quot; ;<br>
&gt;       double st_edges_ocean(st_edges_ocean) ;<br>
&gt;               st_edges_ocean:long_name = &quot;tcell pstar edges&quot; ;<br>
&gt;               st_edges_ocean:units = &quot;dbars&quot; ;<br>
&gt;               st_edges_ocean:cartesian_axis = &quot;Z&quot; ;<br>
&gt;               st_edges_ocean:positive = &quot;down&quot; ;<br>
&gt;       double potrho(potrho) ;<br>
&gt;               potrho:long_name = &quot;potential density&quot; ;<br>
&gt;               potrho:units = &quot;kg/m^3&quot; ;<br>
&gt;               potrho:cartesian_axis = &quot;Z&quot; ;<br>
&gt;               potrho:positive = &quot;down&quot; ;<br>
&gt;               potrho:edges = &quot;potrho_edges&quot; ;<br>
&gt;       double potrho_edges(potrho_edges) ;<br>
&gt;               potrho_edges:long_name = &quot;potential density edges&quot; ;<br>
&gt;               potrho_edges:units = &quot;kg/m^3&quot; ;<br>
&gt;               potrho_edges:cartesian_axis = &quot;Z&quot; ;<br>
&gt;               potrho_edges:positive = &quot;down&quot; ;<br>
&gt;       float depth_of_theta(Time, theta, grid_yt_ocean, grid_xt_ocean) ;<br>
&gt;               depth_of_theta:long_name = &quot;depth of potential temp surface&quot; ;<br>
&gt;               depth_of_theta:units = &quot;m&quot; ;<br>
&gt;               depth_of_theta:valid_range = 0.f, 1.e+10f ;<br>
&gt;               depth_of_theta:missing_value = -1.e+20f ;<br>
&gt;               depth_of_theta:_FillValue = -1.e+20f ;<br>
&gt;               depth_of_theta:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               depth_of_theta:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;       float rho(Time, st_ocean, yt_ocean, xt_ocean) ;<br>
&gt;               rho:long_name = &quot;in situ density&quot; ;<br>
&gt;               rho:units = &quot;kg/m^3&quot; ;<br>
&gt;               rho:valid_range = -10.f, 100000.f ;<br>
&gt;               rho:missing_value = -1.e+20f ;<br>
&gt;               rho:_FillValue = -1.e+20f ;<br>
&gt;               rho:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               rho:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               rho:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;       float neutral_rho(Time, st_ocean, yt_ocean, xt_ocean) ;<br>
&gt;               neutral_rho:long_name = &quot;potential density estimate of neutral density&quot; ;<br>
&gt;               neutral_rho:units = &quot;kg/m^3&quot; ;<br>
&gt;               neutral_rho:valid_range = -10.f, 100000.f ;<br>
&gt;               neutral_rho:missing_value = -1.e+20f ;<br>
&gt;               neutral_rho:_FillValue = -1.e+20f ;<br>
&gt;               neutral_rho:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               neutral_rho:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               neutral_rho:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;       float pot_rho_0(Time, st_ocean, yt_ocean, xt_ocean) ;<br>
&gt;               pot_rho_0:long_name = &quot;potential density referenced to 0 dbar&quot; ;<br>
&gt;               pot_rho_0:units = &quot;kg/m^3&quot; ;<br>
&gt;               pot_rho_0:valid_range = -10.f, 100000.f ;<br>
&gt;               pot_rho_0:missing_value = -1.e+20f ;<br>
&gt;               pot_rho_0:_FillValue = -1.e+20f ;<br>
&gt;               pot_rho_0:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               pot_rho_0:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               pot_rho_0:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;               pot_rho_0:standard_name = &quot;sea_water_potential_density&quot; ;<br>
&gt;       float salt_on_rho(Time, potrho, grid_yt_ocean, grid_xt_ocean) ;<br>
&gt;               salt_on_rho:long_name = &quot;salt on potential density surface&quot; ;<br>
&gt;               salt_on_rho:units = &quot;psu&quot; ;<br>
&gt;               salt_on_rho:valid_range = 0.f, 1000.f ;<br>
&gt;               salt_on_rho:missing_value = -1.e+20f ;<br>
&gt;               salt_on_rho:_FillValue = -1.e+20f ;<br>
&gt;               salt_on_rho:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               salt_on_rho:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;       float potrho_mix_depth(Time, yt_ocean, xt_ocean) ;<br>
&gt;               potrho_mix_depth:long_name = &quot;Depth of potential density mixed layer&quot; ;<br>
&gt;               potrho_mix_depth:units = &quot;m&quot; ;<br>
&gt;               potrho_mix_depth:valid_range = -1000000.f, 1000000.f ;<br>
&gt;               potrho_mix_depth:missing_value = -1.e+20f ;<br>
&gt;               potrho_mix_depth:_FillValue = -1.e+20f ;<br>
&gt;               potrho_mix_depth:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               potrho_mix_depth:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               potrho_mix_depth:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;       float potrho_mix_base(Time, yt_ocean, xt_ocean) ;<br>
&gt;               potrho_mix_base:long_name = &quot;Potential density at mixed layer base&quot; ;<br>
&gt;               potrho_mix_base:units = &quot;kg/m^3&quot; ;<br>
&gt;               potrho_mix_base:valid_range = -1000000.f, 1000000.f ;<br>
&gt;               potrho_mix_base:missing_value = -1.e+20f ;<br>
&gt;               potrho_mix_base:_FillValue = -1.e+20f ;<br>
&gt;               potrho_mix_base:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               potrho_mix_base:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               potrho_mix_base:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;       float press(Time, st_ocean, yt_ocean, xt_ocean) ;<br>
&gt;               press:long_name = &quot;absolute pressure&quot; ;<br>
&gt;               press:units = &quot;dbar&quot; ;<br>
&gt;               press:valid_range = -10.f, 1000000.f ;<br>
&gt;               press:missing_value = -1.e+20f ;<br>
&gt;               press:_FillValue = -1.e+20f ;<br>
&gt;               press:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               press:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               press:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;       float mld(Time, yt_ocean, xt_ocean) ;<br>
&gt;               mld:long_name = &quot;mixed layer depth determined by density criteria&quot; ;<br>
&gt;               mld:units = &quot;m&quot; ;<br>
&gt;               mld:valid_range = 0.f, 1000000.f ;<br>
&gt;               mld:missing_value = -1.e+20f ;<br>
&gt;               mld:_FillValue = -1.e+20f ;<br>
&gt;               mld:cell_methods = &quot;time: mean&quot; ;<br>
&gt;               mld:time_avg_info = &quot;average_T1,average_T2,average_DT&quot; ;<br>
&gt;               mld:coordinates = &quot;geolon_t geolat_t&quot; ;<br>
&gt;               mld:standard_name = &quot;ocean_mixed_layer_thickness_defined_by_sigma_t&quot; ;<br>
&gt;       double average_T1(Time) ;<br>
&gt;               average_T1:long_name = &quot;Start time for average period&quot; ;<br>
&gt;               average_T1:units = &quot;days since 1980-01-01 00:00:00&quot; ;<br>
&gt;               average_T1:missing_value = 1.e+20 ;<br>
&gt;               average_T1:_FillValue = 1.e+20 ;<br>
&gt;       double average_T2(Time) ;<br>
&gt;               average_T2:long_name = &quot;End time for average period&quot; ;<br>
&gt;               average_T2:units = &quot;days since 1980-01-01 00:00:00&quot; ;<br>
&gt;               average_T2:missing_value = 1.e+20 ;<br>
&gt;               average_T2:_FillValue = 1.e+20 ;<br>
&gt;       double average_DT(Time) ;<br>
&gt;               average_DT:long_name = &quot;Length of average period&quot; ;<br>
&gt;               average_DT:units = &quot;days&quot; ;<br>
&gt;               average_DT:missing_value = 1.e+20 ;<br>
&gt;               average_DT:_FillValue = 1.e+20 ;<br>
&gt;       double Time_bounds(Time, nv) ;<br>
&gt;               Time_bounds:long_name = &quot;Time axis boundaries&quot; ;<br>
&gt;               Time_bounds:units = &quot;days&quot; ;<br>
&gt;               Time_bounds:missing_value = 1.e+20 ;<br>
&gt;               Time_bounds:_FillValue = 1.e+20 ;<br>
&gt;<br>
&gt; // global attributes:<br>
&gt;               :filename = &quot;<a href="http://ocean_layer.nc" target="_blank">ocean_layer.nc</a>&quot; ;<br>
&gt;               :title = &quot;MOM4 box&quot; ;<br>
&gt;               :grid_type = &quot;regular&quot; ;<br>
&gt;               :grid_tile = &quot;N/A&quot; ;<br>
&gt; data:<br>
&gt;<br>
&gt;  grid_xt_ocean = 1.25, 3.75, 6.25, 8.75, 11.25, 13.75, 16.25, 18.75, 21.25,<br>
&gt;     23.75, 26.25, 28.75, 31.25, 33.75, 36.25, 38.75, 41.25, 43.75, 46.25,<br>
&gt;     48.75, 51.25, 53.75, 56.25, 58.75 ;<br>
&gt;<br>
&gt;  grid_yt_ocean = 1.25, 3.7488100528717, 6.2393012046814, 8.71919345855713,<br>
&gt;     11.1815176010132, 13.6242818832397, 16.0408229827881, 18.4296073913574,<br>
&gt;     20.784387588501, 23.1042194366455, 25.3833503723145, 27.6215190887451,<br>
&gt;     29.813497543335, 31.9597606658936, 34.0555992126465, 36.1022338867188,<br>
&gt;     38.0954322814941, 40.0371551513672, 41.9235687255859, 43.7573394775391,<br>
&gt;     45.5349464416504, 47.259708404541, 48.9283294677734, 50.5447235107422,<br>
&gt;     52.1057090759277, 53.6157531738281, 55.0716934204102, 56.4785079956055,<br>
&gt;     57.8329429626465, 59.1404571533203, 60.3976211547852, 61.6103477478027,<br>
&gt;     62.7749481201172, 63.8977813720703, 64.9748153686523 ;<br>
&gt;<br>
&gt;  theta = -1.84, -1.52, -1.2, -0.88, -0.56, -0.24, 0.0800000000000003, 0.4,<br>
&gt;     0.72, 1.04, 1.36, 1.68, 2, 2.32, 2.64, 2.96, 3.28, 3.6, 3.92, 4.24, 4.56,<br>
&gt;     4.88, 5.2, 5.52, 5.84, 6.16, 6.48, 6.8, 7.12, 7.44, 7.76, 8.08, 8.4,<br>
&gt;     8.72, 9.04, 9.36, 9.68000000000001, 10, 10.32, 10.64, 10.96, 11.28, 11.6,<br>
&gt;     11.92, 12.24, 12.56, 12.88, 13.2, 13.52, 13.84, 14.16, 14.48, 14.8,<br>
&gt;     15.12, 15.44, 15.76, 16.08, 16.4, 16.72, 17.04, 17.36, 17.68, 18, 18.32,<br>
&gt;     18.64, 18.96, 19.28, 19.6, 19.92, 20.24, 20.56, 20.88, 21.2, 21.52,<br>
&gt;     21.84, 22.16, 22.48, 22.8, 23.12, 23.44, 23.76, 24.08, 24.4, 24.72,<br>
&gt;     25.04, 25.36, 25.68, 26, 26.32, 26.64, 26.96, 27.28, 27.6, 27.92, 28.24,<br>
&gt;     28.56, 28.88, 29.2, 29.52, 29.84 ;<br>
&gt;<br>
&gt;  theta_edges = 1028, 1028.1, 1028.2, 1028.3, 1028.4, 1028.5, 1028.6, 1028.7,<br>
&gt;     1028.8, 1028.9, 1029, 1029.1, 1029.2, 1029.3, 1029.4, 1029.5, 1029.6,<br>
&gt;     1029.7, 1029.8, 1029.9, 1030, 1030.1, 1030.2, 1030.3, 1030.4, 1030.5,<br>
&gt;     1030.6, 1030.7, 1030.8, 1030.9, 1031, 1031.1, 1031.2, 1031.3, 1031.4,<br>
&gt;     1031.5, 1031.6, 1031.7, 1031.8, 1031.9, 1032, 1032.1, 1032.2, 1032.3,<br>
&gt;     1032.4, 1032.5, 1032.6, 1032.7, 1032.8, 1032.9, 1033, 1033.1, 1033.2,<br>
&gt;     1033.3, 1033.4, 1033.49999999999, 1033.59999999999, 1033.69999999999,<br>
&gt;     1033.79999999999, 1033.89999999999, 1033.99999999999, 1034.09999999999,<br>
&gt;     1034.19999999999, 1034.29999999999, 1034.39999999999, 1034.49999999999,<br>
&gt;     1034.59999999999, 1034.69999999999, 1034.79999999999, 1034.89999999999,<br>
&gt;     1034.99999999999, 1035.09999999999, 1035.19999999999, 1035.29999999999,<br>
&gt;     1035.39999999999, 1035.49999999999, 1035.59999999999, 1035.69999999999,<br>
&gt;     1035.79999999999, 1035.89999999999, 1035.99999999999, 1036.09999999999,<br>
&gt;     1036.19999999999, 1036.29999999999, 1036.39999999999, 1036.49999999999,<br>
&gt;     1036.59999999999, 1036.69999999999, 1036.79999999999, 1036.89999999999,<br>
&gt;     1036.99999999999, 1037.09999999999, 1037.19999999999, 1037.29999999999,<br>
&gt;     1037.39999999999, 1037.49999999999, 1037.59999999999, 1037.69999999999,<br>
&gt;     1037.79999999999, 1037.89999999999, 1037.99999999999 ;<br>
&gt;<br>
&gt;  Time = 2 ;<br>
&gt;<br>
&gt;  nv = 1, 2 ;<br>
&gt;<br>
&gt;  xt_ocean = 1.25, 3.75, 6.25, 8.75, 11.25, 13.75, 16.25, 18.75, 21.25, 23.75,<br>
&gt;     26.25, 28.75, 31.25, 33.75, 36.25, 38.75, 41.25, 43.75, 46.25, 48.75,<br>
&gt;     51.25, 53.75, 56.25, 58.75 ;<br>
&gt;<br>
&gt;  yt_ocean = 1.25, 3.7488100528717, 6.2393012046814, 8.71919345855713,<br>
&gt;     11.1815176010132, 13.6242818832397, 16.0408229827881, 18.4296073913574,<br>
&gt;     20.784387588501, 23.1042194366455, 25.3833503723145, 27.6215190887451,<br>
&gt;     29.813497543335, 31.9597606658936, 34.0555992126465, 36.1022338867188,<br>
&gt;     38.0954322814941, 40.0371551513672, 41.9235687255859, 43.7573394775391,<br>
&gt;     45.5349464416504, 47.259708404541, 48.9283294677734, 50.5447235107422,<br>
&gt;     52.1057090759277, 53.6157531738281, 55.0716934204102, 56.4785079956055,<br>
&gt;     57.8329429626465, 59.1404571533203, 60.3976211547852, 61.6103477478027,<br>
&gt;     62.7749481201172, 63.8977813720703, 64.9748153686523 ;<br>
&gt;<br>
&gt;  st_ocean = 17.75025, 53.25075, 88.75125, 124.25175, 159.75225, 195.25275,<br>
&gt;     230.75325, 266.25375, 314.34159289856, 399.171716592407,<br>
&gt;     541.922400494385, 759.079548358154, 1061.10117883301, 1451.56990550537,<br>
&gt;     1926.90292906494, 2476.64250944824, 3084.30280480957, 3728.70522619629 ;<br>
&gt;<br>
&gt;  st_edges_ocean = 0, 35.5005, 71.001, 106.5015, 142.002, 177.5025, 213.003,<br>
&gt;     248.5035, 290.29765597229, 356.756654745483, 470.547043066406,<br>
&gt;     650.50097442627, 910.090332641602, 1256.33548026123, 1689.23641728516,<br>
&gt;     2201.77290498047, 2780.47265712891, 3406.50401550293, 4057.20024763184 ;<br>
&gt;<br>
&gt;  potrho = 1028.05, 1028.15, 1028.25, 1028.35, 1028.45, 1028.55, 1028.65,<br>
&gt;     1028.75, 1028.85, 1028.95, 1029.05, 1029.15, 1029.25, 1029.35, 1029.45,<br>
&gt;     1029.55, 1029.65, 1029.75, 1029.85, 1029.95, 1030.05, 1030.15, 1030.25,<br>
&gt;     1030.35, 1030.45, 1030.55, 1030.65, 1030.75, 1030.85, 1030.95, 1031.05,<br>
&gt;     1031.15, 1031.25, 1031.35, 1031.45, 1031.55, 1031.65, 1031.75, 1031.85,<br>
&gt;     1031.95, 1032.05, 1032.15, 1032.25, 1032.35, 1032.45, 1032.55, 1032.65,<br>
&gt;     1032.75, 1032.85, 1032.95, 1033.05, 1033.15, 1033.25, 1033.35, 1033.45,<br>
&gt;     1033.54999999999, 1033.64999999999, 1033.74999999999, 1033.84999999999,<br>
&gt;     1033.94999999999, 1034.04999999999, 1034.14999999999, 1034.24999999999,<br>
&gt;     1034.34999999999, 1034.44999999999, 1034.54999999999, 1034.64999999999,<br>
&gt;     1034.74999999999, 1034.84999999999, 1034.94999999999, 1035.04999999999,<br>
&gt;     1035.14999999999, 1035.24999999999, 1035.34999999999, 1035.44999999999,<br>
&gt;     1035.54999999999, 1035.64999999999, 1035.74999999999, 1035.84999999999,<br>
&gt;     1035.94999999999, 1036.04999999999, 1036.14999999999, 1036.24999999999,<br>
&gt;     1036.34999999999, 1036.44999999999, 1036.54999999999, 1036.64999999999,<br>
&gt;     1036.74999999999, 1036.84999999999, 1036.94999999999, 1037.04999999999,<br>
&gt;     1037.14999999999, 1037.24999999999, 1037.34999999999, 1037.44999999999,<br>
&gt;     1037.54999999999, 1037.64999999999, 1037.74999999999, 1037.84999999999,<br>
&gt;     1037.94999999999 ;<br>
&gt;<br>
&gt;  potrho_edges = 1028, 1028.1, 1028.2, 1028.3, 1028.4, 1028.5, 1028.6, 1028.7,<br>
&gt;     1028.8, 1028.9, 1029, 1029.1, 1029.2, 1029.3, 1029.4, 1029.5, 1029.6,<br>
&gt;     1029.7, 1029.8, 1029.9, 1030, 1030.1, 1030.2, 1030.3, 1030.4, 1030.5,<br>
&gt;     1030.6, 1030.7, 1030.8, 1030.9, 1031, 1031.1, 1031.2, 1031.3, 1031.4,<br>
&gt;     1031.5, 1031.6, 1031.7, 1031.8, 1031.9, 1032, 1032.1, 1032.2, 1032.3,<br>
&gt;     1032.4, 1032.5, 1032.6, 1032.7, 1032.8, 1032.9, 1033, 1033.1, 1033.2,<br>
&gt;     1033.3, 1033.4, 1033.49999999999, 1033.59999999999, 1033.69999999999,<br>
&gt;     1033.79999999999, 1033.89999999999, 1033.99999999999, 1034.09999999999,<br>
&gt;     1034.19999999999, 1034.29999999999, 1034.39999999999, 1034.49999999999,<br>
&gt;     1034.59999999999, 1034.69999999999, 1034.79999999999, 1034.89999999999,<br>
&gt;     1034.99999999999, 1035.09999999999, 1035.19999999999, 1035.29999999999,<br>
&gt;     1035.39999999999, 1035.49999999999, 1035.59999999999, 1035.69999999999,<br>
&gt;     1035.79999999999, 1035.89999999999, 1035.99999999999, 1036.09999999999,<br>
&gt;     1036.19999999999, 1036.29999999999, 1036.39999999999, 1036.49999999999,<br>
&gt;     1036.59999999999, 1036.69999999999, 1036.79999999999, 1036.89999999999,<br>
&gt;     1036.99999999999, 1037.09999999999, 1037.19999999999, 1037.29999999999,<br>
&gt;     1037.39999999999, 1037.49999999999, 1037.59999999999, 1037.69999999999,<br>
&gt;     1037.79999999999, 1037.89999999999, 1037.99999999999 ;<br>
&gt; }<br>
&gt;<br>
&gt; I am having trouble deciding which will be the xdef, ydef, zdef, and tdef values. Also, how do I find what UNDEF number to use. Your help will be greatly appreciated.<br>
&gt;<br>
&gt; Thanks,<br>
&gt;<br>
&gt; David<br>
&gt;<br>
&gt;<br>
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</blockquote></div><br></div>