All,
Here is another way to get at these data. Navigate to
https://goldsmr4.gesdisc.eosdis.nasa.gov/opendap/MERRA2_MONTHLY/M2TMNXSLV.5.12.4/1980/
derived from the URL you provided.
Click on the "THREDDS Catalog XML" link at the bottom which will yield:
https://goldsmr4.gesdisc.eosdis.nasa.gov/opendap/MERRA2_MONTHLY/M2TMNXSLV.5.12.4/1980/catalog.xml
Copy and paste that catalog URL into the IDV Dashboard, Data Choosers Tab,
under the Catalogs node.
At that point, I believe you should be able to load your data.
Best,
On Tue, Jan 3, 2017 at 2:28 PM, Lynnes, Christopher S. (GSFC-5860) <
christopher.s.lynnes@xxxxxxxx> wrote:
>
> > On Dec 21, 2016, at 2:23 PM, Teddy Allen <teddyallen@xxxxxxxxx> wrote:
> >
> > Hello,
> > I am having trouble accessing MERRA-2 data from their opendap URL
> located below:
> > https://goldsmr4.gesdisc.eosdis.nasa.gov/opendap/
> MERRA2_MONTHLY/M2TMNXSLV.5.12.4/1980/MERRA2_100.tavgM_2d_
> slv_Nx.198001.nc4.html Does anybody have an idea on how to use the "Data
> URL" to load the data into IDV?
> >
> > In the past with other datasets, I substitute https with dods and
> everything works well. However, in the case above, I am unable to access
> the data via URL. Has anybody had success in accessing the MERRA-2 data
> from here:https://disc.sci.gsfc.nasa.gov/uui/datasets?
> keywords=%22MERRA-2%22
>
> For this case, I navigated my browser to your HTML link above, then copied
> the contents of the Data URL field out of the HTML form. (This is actually
> identical to just chopping off the .html from your link.)
> Then I pasted it into the data chooser blank. It prompted me for user
> name and password, as registration is now required for data fetching. When
> I entered those, I got the list of variables and verified I was getting the
> data by generating a plot.
>
> Note that adding .dods definitely causes an error, because the IDV program
> has to read the metadata (which is available via the .das and .dds
> extensions) before getting the data. I have argued in the past that IDV
> should be more forgiving, and at least TRY to get the metadata by dropping
> any “.dods” extension (or .das, .dds, .ddx, etc.) that may have been
> mistakenly included in the URL. But to no avail. Maybe if more folks
> chimed in, though…
>
> >
> > Thank you for your insights.Sincerely,teddy allen
> >
> > http://www.teddyallen.com"To move quickly, go alone. To move far, go
> together." African Proverb
> >
> > _______________________________________________
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>
> —
> Christopher Lynnes NASA/GSFC 301-614-5185
> ""The future is already here — it's just not very evenly distributed." -
> Wm. Gibson
>
>
>
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--
Julien Chastang
Scientific Software Developer
Unidata-UCAR
