[netcdf-java] acces remote NetcdfSubset from NetCDF java library

• To: netcdf-java@xxxxxxxxxxxxxxxx
• Subject: [netcdf-java] acces remote NetcdfSubset from NetCDF java library
• From: alexis <alexis.bocquet@xxxxxxxxxxxxxxxxxx>
• Date: Tue, 3 May 2011 03:19:48 -0700 (PDT)

Hi,

I would like to get data from a NetcdfSubset using the NetCDF java library.
I made different tries without any success.

I am passing through a proxy and I think the parameter were set correctly.
I tried either with the version 4.1 and 4.2 of the library.
With version 4.1 I used this code:

// Set proxy if specified 
if (this.proxyHost != null) {
        httpClient.getHostConfiguration().setProxy(
                this.proxyHost, 
                this.proxyPort);
}
NetcdfDataset.setHttpClient(httpClient);


With version 4.2 I used this code:

// Set proxy if specified 
if (this.proxyHost != null) {
        System.setProperty("http.proxyHost", this.proxyHost);
        System.setProperty("http.proxyPort", String.valueOf(this.proxyPort));
}



The URL I use to get the data is:
http://motherlode.ucar.edu:8080/thredds/ncss/grid/fmrc/NCEP/GFS/Global_0p5deg/runs/NCEP-GFS-Global_0p5deg_RUN_2011-04-01T00:00:00Z?var=U-component_of_wind_height_above_ground,V-component_of_wind_height_above_ground,Temperature_height_above_ground&temporal=range&time_start=2011-04-01T00:00:00&time_end=2011-04-08T12:00:00&spatial=bb&south=15.5&north=16.5&west=-62.0&east=-61.0

When I copy / paste this URL on my browser, I am able to save the nc file.
So I do not know I am doing wrong.

I tried both with either:

this.netcdfFile = NetcdfFile.open(filepath);
this.netcdfFile = NetcdfDataset.openFile(filepath, null);


But I get the same error at the end which is:
Cant read
http://motherlode.ucar.edu:8080/thredds/ncss/grid/fmrc/NCEP/GFS/Global_0p5deg/runs/NCEP-GFS-Global_0p5deg_RUN_2011-04-01T00:00:00Z?var=U-component_of_wind_height_above_ground,V-component_of_wind_height_above_ground,Temperature_height_above_ground&temporal=range&time_start=2011-04-01T00:00:00&time_end=2011-04-08T12:00:00&spatial=bb&south=15.5&north=16.5&west=-62.0&east=-61.0:
not a valid CDM file.

I also tried with:

NetcdfDataset.initNetcdfFileCache(100,200000,15*60);
this.netcdfFile = NetcdfDataset.acquireFile(filepath, null);


But again I got the same error.

Could somebody tell if what I am trying to do is possible. And if so help me
on how to do it.

Thanks,

Alex



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    • From: Ethan Davis