thanks Rich, for answering that question.
BTW, im noticing that a number of email servers are refusing messages with zip
attachments, since thats a possible security problem. Probably best to just
include the URL when you want to provide a zip file. thanks.
Rich Signell wrote:
Dave,
I've been working on a similar problem: using NcML to make the HDF
remote sensing imagery served by the NOAA Coastwatch East Coast
OpenDAP server CF-compliant.
I have been using aggregation type="union" to join the HDF data with a
netcdf file that contains the lon/lat values, since Coastwatch uses
the same non-uniform lon/lat grid (it's a uniform mercator grid).
The NcML looks like this:
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>
<aggregation type="union">
<netcdf
location="http://coast-enviro.er.usgs.gov/models/gom_interop/coastwatch_northeast_lonlat.nc"/>
<netcdf
location="http://coastwatch.chesapeakebay.noaa.gov/dap/edac/avhrr/data/2008_135_0921_noaa15_ex1_sst.hdf"/>
</aggregation>
</netcdf>
I can also aggregate the HDF5 images along a virtual time dimension
and then union with the netcdf file that has the lon/lat values, and
it works -- only remaining issue is that the scale_factor is lost for
some reason, which I'm looking into.
Try getting http://coast-enviro.er.usgs.gov/models/share/coastwatch.zip
and running "test_sst", then looking at the two NcML files "sst.ncml"
-Rich
On Fri, May 30, 2008 at 9:20 AM, David Robertson
<robertson@xxxxxxxxxxxxxxxxxx> wrote:
Hi,
If I want to serve aggregated HDF5 files, do I have to specify the
coordinate system (grid) with NcML, or is there a way to construct the
HDF5 file so THREDDS can get the coordSys directly from the HDF5 file? I
ask because if my only option is NcML I will ask my "data source" to
create NetCDF files instead since the coverage area is 1222 x 1183
points and they are not equal spaced.
Thanks,
Dave
_______________________________________________
thredds mailing list
thredds@xxxxxxxxxxxxxxxx
For list information or to unsubscribe, visit:
http://www.unidata.ucar.edu/mailing_lists/
------------------------------------------------------------------------
_______________________________________________
thredds mailing list
thredds@xxxxxxxxxxxxxxxx
For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
