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Thanks a ton Don! This makes some stuff clear. I will play around it a bit and let you know how it goes. Regards, Nilesh. On Fri, Nov 14, 2008 at 5:01 PM, Don Murray <dmurray@xxxxxxxxxxxxxxxx>wrote: > Hi Nilesh- > > Nilesh Mahajan wrote: > >> I am kinda new to IDV and have some questions about subsetting METAR data. >> > > No problem. > > 1. Assuming we are using netCDF METAR, how does the end user subset on the >> local client(sequence of actions)? Is the subsetting possible if IDV was >> invoked through Java WebStart? >> > > You can either do it through the Data Source Properties dialog which > will do it for all data you load (probably what you want) or use > the data subset panel for the individual display. For the former, > you would load in the netCDF metar data and right click on the > Data Source in the Field Selector and select Properties from the > popup menu (or double click on the data source). In the > Spatial Subset tab of the Properties Dialog, you can draw a > bounding box, or enter the N-S-E-W coordinates for the subset. > > 2. After the user is done subsetting, if she saves the bundle file, is the >> subsetting info (latitude and longitude parameters) stored in .xidv file? >> If >> so what Java Class and attributes? We are thinking of parsing a template >> .xidv file (generated after subsetting), replacing the data source, >> lat/long >> info then pass this file as a parameter (-bundle) to jnlp. This jnlp will >> invoke IDV on client's machine. We hope that the subsetting will happen >> automatically this way without user intervention. >> > > The bounding box is stored in the GeoSelection object and looks like: > > <property name="Description"> > <string><![CDATA[Netcdf Point Data]]></string> > </property> > <property name="DataSelection"> > <object class="ucar.unidata.data.DataSelection"> > <property name="GeoSelection"> > <object > class="ucar.unidata.data.GeoSelection"> > <property name="BoundingBox"> > <object > class="ucar.unidata.data.GeoLoca > tionInfo"> > <property name="MaxLat"> > <double>48.0</double> > </property> > <property name="MinLat"> > <double>28.5</double> > </property> > <property name="MinLon"> > <double>-123.0</double> > </property> > <property name="MaxLon"> > <double>-93.0</double> > </property> > </object> > </property> > </object> > </property> > </object> > </property> > > in the bundle. > > 3. We also want the IDV to load data with preconfigured parameters like >> temperature, pressure. Again we think that we can achieve this with the >> above approach of modifying the bundle file with these parameters. Do you >> think this is the best way to go? >> > > A better way might be to use the IDV Scripting Language (ISL) capability > to specify the data source and type of display. If you are doing > a station model plot, you could specify the name of the station model > that you created to show the particular parameters. See the docs at: > > http://www.unidata.ucar.edu/software/IDV/docs/userguide/isl/index.html > > In particular, look at the Data and Displays tags: > > > http://www.unidata.ucar.edu/software/IDV/docs/userguide/isl/DataAndDisplays.html > > You could then just modify the isl file as needed and pass that in > as arguments in the JNLP file using the -isInteractive argument as well. > > Sorry for the deluge of questions. As I said I am new to IDV and couldn't >> find much documentation on this stuff. Thanks for your help. >> > > At least you looked. ;-) There isn't any docs on internal > structure of the bundle in terms of what you are looking for. > > Don > > ************************************************************* > Don Murray UCAR Unidata Program > dmurray@xxxxxxxxxxxxxxxx P.O. Box 3000 > (303) 497-8628 Boulder, CO 80307 > http://www.unidata.ucar.edu/staff/donm > ************************************************************* > >
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