[thredds] NetCDF Subsetter

Hi all,

I've just installed the 4.0 alpha on an internal dev box and let some
user loose on it (yay!)  One of them has found an interesting issue with
the NetCDFSubset service.

Firstly, when he tried to load a subset from the form, he got a 404 file
not found from his browser.  Oddly enough, when I tried it on my
browser, I got a .nc file returned.  When I opened up the file in vim,
it had the following message:

Bounding Box must have east > west; if crossing 180 meridion, use east
boundary > 180

Perhaps this should have the mime type of text?  Even so, I wonder why
we had different browser behaviour (obviously, this is not related to TDS).

The second odd behaviour we saw was the default bounding box values, the
NetCDF subset form had the following box:

North:  88.5419
West: 0.0000
East: -1.8750
South: -88.5419

Which was why we got the bounding box error message.  Looking at the
actual ASCII itself, the lon values were from 0.0 to 358.125, with an
interval of 1.875.

Are there missing values in the metadata?  The das for Longitude is:

    lon {
         String units "degrees_east";
         String long_name "Longitude";
         Float32 actual_range 0.0, 358.125;
    }

I've included the generated dataset.xml file too, in case if you can
spot anything.

Thanks :)

-Pauline.

--
Pauline Mak

ARCS
Ph: (03) 6226 7518
Email: pauline.mak@xxxxxxxxxxx
Jabber: pauline.mak@xxxxxxxxxxx
http://www.arcs.org.au/

TPAC
Email: pauline.mak@xxxxxxxxxxx
http://www.tpac.org.au/



<?xml version="1.0" encoding="UTF-8"?>
<gridDataset 
location="/library/hyrax/ncep1/surface_gauss/skt.sfc.gauss/skt.sfc.gauss.1987.nc"
 path="path">
  <axis name="lat" shape="94" type="float" axisType="Lat">
    <attribute name="units" value="degrees_north" />
    <attribute name="actual_range" type="float" value="88.542 -88.542" />
    <attribute name="long_name" value="Latitude" />
    <attribute name="_CoordinateAxisType" value="Lat" />
    <values>88.54199981689453 86.6530990600586 84.7531967163086 
82.85079956054688 80.94730377197266 79.04350280761719 77.13939666748047 
75.23509979248047 73.33070373535156 71.42620086669922 69.52169799804688 
67.61710357666016 65.7125015258789 63.807899475097656 61.90330123901367 
59.998600006103516 58.09389877319336 56.189300537109375 54.28459930419922 
52.37990188598633 50.47520065307617 48.570499420166016 46.66579818725586 
44.76110076904297 42.85639953613281 40.951698303222656 39.047000885009766 
37.1422004699707 35.23749923706055 33.332801818847656 31.4281005859375 
29.523399353027344 27.618600845336914 25.713899612426758 23.809200286865234 
21.904399871826172 19.99970054626465 18.094999313354492 16.190200805664062 
14.285499572753906 12.380800247192383 10.47603988647461 8.571310043334961 
6.66657018661499 4.761839866638184 2.857100009918213 0.9523680210113525 
-0.9523680210113525 -2.857100009918213 -4.761839866638184 -6.66657018661499 
-8.571310043334961 -10.47603988647461 -12.380800247192383 -14.285499572753906 
-16.190200805664062 -18.094999313354492 -19.99970054626465 -21.904399871826172 
-23.809200286865234 -25.713899612426758 -27.618600845336914 -29.523399353027344 
-31.4281005859375 -33.332801818847656 -35.23749923706055 -37.1422004699707 
-39.047000885009766 -40.951698303222656 -42.85639953613281 -44.76110076904297 
-46.66579818725586 -48.570499420166016 -50.47520065307617 -52.37990188598633 
-54.28459930419922 -56.189300537109375 -58.09389877319336 -59.998600006103516 
-61.90330123901367 -63.807899475097656 -65.7125015258789 -67.61710357666016 
-69.52169799804688 -71.42620086669922 -73.33070373535156 -75.23509979248047 
-77.13939666748047 -79.04350280761719 -80.94730377197266 -82.85079956054688 
-84.7531967163086 -86.6530990600586 -88.54199981689453</values>
  </axis>
  <axis name="lon" shape="192" type="float" axisType="Lon">
    <attribute name="units" value="degrees_east" />
    <attribute name="long_name" value="Longitude" />
    <attribute name="actual_range" type="float" value="0.0 358.125" />
    <attribute name="_CoordinateAxisType" value="Lon" />
    <values start="0.0" increment="1.875" npts="192" />
  </axis>
  <axis name="time" shape="1460" type="double" axisType="Time">
    <attribute name="units" value="hours since 1-1-1 00:00:0.0" />
    <attribute name="long_name" value="Time" />
    <attribute name="actual_range" type="double" value="1.7408952E7 
1.7417706E7" />
    <attribute name="delta_t" value="0000-00-00 06:00:00" />
    <attribute name="_CoordinateAxisType" value="Time" />
    <values start="1.7408952E7" increment="6.0" npts="1460" />
  </axis>
  <gridSet name="time lat lon">
    <axisRef name="time" />
    <axisRef name="lat" />
    <axisRef name="lon" />
    <grid name="skt" shape="time lat lon" type="short">
      <attribute name="long_name" value="SST/Land Skin Temperature" />
      <attribute name="actual_range" type="float" value="156.2 359.1" />
      <attribute name="units" value="degK" />
      <attribute name="precision" type="short" value="2" />
      <attribute name="least_significant_digit" type="short" value="1" />
      <attribute name="GRIB_id" type="short" value="11" />
      <attribute name="GRIB_name" value="TMP" />
      <attribute name="var_desc" value="Skin Temperature&#xA;FG" />
      <attribute name="dataset" value="NMC Reanalysis&#xA;L" />
      <attribute name="level_desc" value="Surface&#xA;0" />
      <attribute name="statistic" value="Individual Obs&#xA;I" />
      <attribute name="parent_stat" value="Other&#xA;-" />
    </grid>
  </gridSet>
  <LatLonBox>
    <west>0.0000</west>
    <east>-1.8750</east>
    <south>-88.5419</south>
    <north>88.5419</north>
  </LatLonBox>
  <TimeSpan>
    <begin>1987-01-01T00:00:00Z</begin>
    <end>1987-12-31T18:00:00Z</end>
  </TimeSpan>
  <AcceptList>
    <accept>xml</accept>
    <accept>csv</accept>
    <accept>netcdf</accept>
  </AcceptList>
</gridDataset>

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