Re: [thredds] Providing data access to GIS users

Jay, I just re-read your original email.  I am working on a downscaling wind
model and had to read subsetted netcdf weather model files from NCEP via a
thredds server.  At the time I was using GDAL to read and re-project
datasets.  It did not support several cf projections, including lcc.  So I
added them and it has been working well for me.  like I said before, I don't
know when ESRI will start using the newest version.  If you have more
questions with functionality in the gdal netcdf driver, let me know.

kss

# ============================
Kyle Shannon
Physical Science Technician
RMRS Fire Sciences Lab
Fire, Fuels & Smoke - RWU 4405
5775 Highway 10 W.
Missoula, MT 59808
(406)829-6954
kshannon@xxxxxxxxx
# ============================


On Tue, Mar 22, 2011 at 11:11, Jay Alder <jay.alder@xxxxxxxxxxxxxxxxxxx>wrote:

> I'm out of the office for a couple weeks, but I'll look into it more when I
> get back. I was able to get my sample to someone at ESRI and they've opened
> a bug report to look into it.
>
> On Mar 22, 2011, at 10:08 AM, Ethan Davis wrote:
>
> > Hi Kyle,
> >
> > Thanks for the update. Sounds promising.
> >
> > All, thanks for filling in the blanks.
> >
> > Jay, let me know if you are still having trouble with your TDS.
> >
> > Ethan
> >
> > On 3/22/2011 10:20 AM, Kyle Shannon wrote:
> >> I am fairly certain that the y-flip issue is fixed in gdal, and it also
> >> handles all of the grid_mapping values/projections in cf-1.4.  Arc uses
> >> GDAL-1.6 right now, but I believe that they will make the jump to 1.8.x
> >> where these issues have been implemented.
> >>
> >> # ============================
> >> Kyle Shannon
> >> Physical Science Technician
> >> RMRS Fire Sciences Lab
> >> Fire, Fuels & Smoke - RWU 4405
> >> 5775 Highway 10 W.
> >> Missoula, MT 59808
> >> (406)829-6954
> >> kshannon@xxxxxxxxx <mailto:kshannon@xxxxxxxxx>
> >> # ============================
> >>
> >>
> >> On Tue, Mar 22, 2011 at 08:29, Roy Mendelssohn <
> Roy.Mendelssohn@xxxxxxxx
> >> <mailto:Roy.Mendelssohn@xxxxxxxx>> wrote:
> >>
> >>    ArcGIS and Mapserver both make heavy use of GDAL, and the fact that
> >>    they work together is probably more a reflection of the shared code
> >>    base than that they necessarily do something correctly.  While GDAL
> >>    is a great library,  I have had similar problems in how it handles
> >>    OPeNDAP and netCDF files  (it flips the images), in cases where the
> >>    grids etc were clearly specified in CF conventions - they were just
> >>    being ignored and GDAL was imposing its own interpretations.
> >>
> >>    The question is not whether ArcGIS works with MapServer, but whether
> >>    the WCS service implemented in THREDDS correctly follows the
> >>    standard, and  provides enough information for a client to interpret
> >>    what it receives correctly. If the answer is yes, then we should be
> >>    talking to ESRI et al. about implementing their client correctly to
> >>    follow the standard.  The equivalent would be saying I should change
> >>    my CF compliant netCDF files to suit GDAL, rather than have GDAL
> >>    learn the standard.
> >>
> >>    My $0.02.
> >>
> >>    -Roy
> >
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>
> Jay Alder
> Graduate Student
> Geosciences
> Wilkinson Hall 105
> http://blogs.oregonstate.edu/paleo
>
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