Hi there,
after playing around with Tiled aggregation i have something working now..
using:
<dataset name="tiled" ID="tiled" urlPath="tiled/Agg.nc">
<metadata inherited="true">
<serviceName>all</serviceName>
<dataType>Grid</dataType>
</metadata>
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>
<aggregation dimName="latitude longitude" type="tiled">
<netcdf location="file:P:/foo_26_04_2011.nc.000.000" section="0:23,0:22"/>
<netcdf location="file:P:/foo_26_04_2011.nc.001.000" section="0:23,22:44"/>
<netcdf location="file:P:/foo_26_04_2011.nc.001.001" section="23:46,22:44"/>
<netcdf location="file:P:/foo_26_04_2011.nc.001.002" section="48:72,22:44"/>
</aggregation>
</netcdf>
</dataset>
the tiling works as expected.. however it requires us to generate the
'section' part, when this should already be clear by inspecting the
lat/long variables/values. it also requires us to name every individual
tile specifically, no scans or regexps. Is there no way around this at
the current stage, we definitely need to populate this section for this
to work ? some of our 'images' are comprised of hundreds of tiles, and
may grow / contract as new areas are included.
Thanks for any comments,
regards,
-ivan
Hi there,
apologies for this, i am sure its a stupid question but i have spent too
much time already. I have a large number of netcdf files that are
actually arranged as a grid/tiled fashion, (file-001-001,
file-001-002..) .. representing the same variables and dimensions and
points in time, just different spatially.
i want to make a virtual dataset that is the combination of all the
tiles..which i will then map via WMS.
i have tried aggregating on the lat/long dimensions like this:
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>
<aggregation dimName="latitude" type="joinExisting" recheckEvery="4 sec">
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>
<aggregation dimName="longitude" type="joinExisting" recheckEvery="4 sec">
<scan location="E:/save/agg/" regExp="files_26_04_2011.nc.*" />
</aggregation>
</netcdf>
</aggregation>
</netcdf>
but it is not working, i get a 'smeared' version of a single tile..
and tried doing a simple union like this:
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>
<aggregation type="union">
<scan location="E:/save/agg/" regExp="files_26_04_2011.nc.*" />
</aggregation>
</netcdf>
but i get only one tile rendered via WMS.
I cannot find any references to aggregations based on any dimension
other than time, and am wondering if this is even possible.. but it
seems like such a common thing to do i must be doing something dumb. i
found one reference to a type of aggregation called 'tiled' but no doco
anywhere for it.. maybe this is what i need ?
any suggestions would be appreciated
cheers
-i
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