Hi Paul,
>
> I am not sure if NCL can handle reading these HDF images from the
>Global Hydrology Resource Center (GHRC). I have attached one to this
>message. I am trying to plot composite radar reflectivity data for
>analysis purposes.
> I believe they are "raster" images, and may not fall into the HDF4 or
>HDF-EOS supported by NCL.
+++
NCL supports HDF Scientific Data Ser [SDS] format and HDF-EOS format.
Currently, it does not support VGROUP data which, I think,
the radar images would be classified.
+++
>However, I thought I would ask to see if
>anyone has had success with this dataset, these type of files, or other
>archived reflectivity datasets and NCL.
> I do know for a fact that IDL can plot these using the code such as:
>hdfid = hdf_open('U'+strtrim(string(times(i)),2)+'Z99.219_refl_2km.hdf')
>hdfid = hdf_gr_start(hdfid)
>hdfid2 = hdf_gr_select(hdfid,0)
>hdfid2 = hdf_gr_readimage(hdfid2,value)
>
>where the _gr option is for "generic raster" I believe.
>If I cannot get this to work, are there other dataset suggestions?
+++
If IDL can read it ... I'm sure u'll get it to work.
What is it u r trying to do with the data?
+++
>Doesn't Unidata have archived radar composites available?
+++
I think they do .... They sent sout a message related to
radar data several months ago.
+++
> Can NCL use these?
+++
What do you mean bu "use"?
There are examples of NCL plotting radar data.
+++
Unidata Java based IDV viewer.
http://my.unidata.ucar.edu/content/software/idv/index.html
http://my.unidata.ucar.edu/content/software/netcdf-java/formats/RadarDataFormat.
html
> Thank you to anyone who can help me. I believe this is not an easy
>problem to tackle.
>
+++
+++
+++
Here is a message that was sent to me last year:
Hi dennis, as per your questions about view radar data:
IDV is a current and supported tool for visualizing all sorts of data
including Level III
http://my.unidata.ucar.edu/content/software/IDV/index.html
Solo is tool for translating radar data formats and also for
visualization
http://www.atd.ucar.edu/rdp/solo/solo_home.html
http://www.atd.ucar.edu/software.html
Here is a very general description (somewhat out of date but easy to
read) of radar issues
http://apollo.lsc.vsc.edu/classes/remote/lecture_notes/radar/88d/
index.html
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