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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
On 4/30/2013 9:19 PM, Kevin Manross wrote:
Hello! I'm *just* now starting to explore the jython capabilities in the IDV. I would like to write a script that the user enters a lat/lon and a date/time and from that, have the IDV plot an image for a radar nearest to that point and nearest that time. This would be run headless for web images. I'm working on a "nearest radar chooser", but the big hurdle I'm facing is: is there a way with IDV/Jython to read and parse the top level catalog http://motherlode.ucar.edu:8080/thredds/catalog/nexrad/level2/catalog.xml or even http://motherlode.ucar.edu:8080/thredds/catalog/nexrad/level2/Kxxx/catalog.xml to get the available dates and times so I could then build the url for makeDataSource? -kevin.
Kevin,
This is a very interesting idea.
In the IDV, we use a table (xml file) to store all radar stations
information. There are a few APIs in the TDSRadarDatasetCollection class
you can use to get a list of stations. You need to write an API to find
the nearest radar station with the input of lat/lon. This probably the
big hurdle for you. After that, there are APIs already that can be used
to parse the server catalog and communicate with the server. You can
reference the TDSRadarChooser and TDSRadarDatasetCollection classes.
The benefit of using Jython is that you can invoke many Java class directly, so I think this project is very interesting. Let us know if you need more help.
Yuan
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