Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
John,We have been involved from quite some time in creating a netCDFdata access layer for Matlab
using Netcdf-Java toolsUI API and it has been working out great, except insome case where we do have to modify/extend the API to address issues with Matlab.
With regards to using the netcdf-java API within Matlab, we have been using the 'GridDataset.open' class to access a netcdf-file which is on a 'HTTP' server. But, in some version of Matlab on linux we do get an error message, where it is unable to access the file from http server. The error is.. >> GridDataset = GridDataset.open(uri); ??? Java exception occurred: java.io.IOException:http://science.whoi.edu/users/kestons/redtide_2005_hindcast/OUT/avg_gom_0014.nc <http://science.whoi.edu/users/kestons/redtide_2005_hindcast/OUT/avg_gom_0014.nc>
is not
a valid URL.Document not found on server
at ucar.nc2.dataset.NetcdfDataset.isDODS(NetcdfDataset.java:360)
at ucar.nc2.dataset.NetcdfDataset.openFile(NetcdfDataset.java:332)
at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:175)
at
ucar.nc2.dataset.NetcdfDatasetCache.acquire(NetcdfDatasetCache.java:203)
at
ucar.nc2.dataset.NetcdfDatasetCache.acquire(NetcdfDatasetCache.java:183)
at
ucar.nc2.dataset.NetcdfDatasetCache.acquire(NetcdfDatasetCache.java:171)
at ucar.nc2.dt.grid.GridDataset.open(GridDataset.java:72)
I understand that the error is generated where a suitable 'http' handler
is not assigned
when I am running this code in Matlab. The quick solution which I found
is to modify the 'isDODS' method
with utility method 'ucar.nc2.util.NetworkUtils.initProtocolHandler()',
which specifies a
http handler for the specified URL.This approach works fine as a temporary solution, but would prefer if this solution is incorporated in your ToolsUI distribution. Do you think it would be possible for you to add this solution to the
ToolsUI future release ? Thank you, Sachin. -- Sachin Kumar Bhate, Software Engineer MSU-High Performance Computing Collaboratory, NGI John C. Stennis Space Center, MS 39529 Ph: (601) 466-9692
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