Hi Dave: MADIS data uses linked lists of records that is so slow when using remote access that its pretty much unuseable, although local access for not-too-huge datasets is ok. We are working on a new service in the TDS for point data access in IDV, which does all the selection on the server for performance, but its still a few months away. It appears you are using a simple HTTP server for your data. Your best bet at the moment is to copy it locally and access from there. Note that you will have to run a TDS server (when thats ready) to get reasonable remote access. > > On Jun 12, 2008, at 2:40 PM, Unidata THREDDS Support wrote: > > > Ah ha! I just got it to read in (your MADIS data that is, > > http://funnel.sfsu.edu/data/LDAD/urbanet/20080610_1200.nc) > > . It worked when I selected "netCDF Point Data files" for the Data > > Source Type (it took a long time because reading this kind of linked > > list point data is not efficient over HTTP). > > > Ethan, > > Right--specifying data type "netCDF Point Data files" is necessary to > get the data loaded and plotted, regardless of the access method. > > I'm running IDV v2.5. On my machine, the IDV succeeds in loading the > file you refer to above via both of my Web servers (funnel and virga), > so we're producing the same result. > > However, trying to load and plot another NetCDF file with a much > larger set of data doesn't work. Try the same URL as above (either > server) but change "urbanet" to "mesonet4". (These files are an order > of magnitude larger, but are still NetCDF point data that I can load > and plot when accessing the via the local file system but not via HTTP.) > > -- Dave > > > > > > Ticket Details =================== Ticket ID: KOO-280301 Department: Support THREDDS Priority: Normal Status: Open
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