Re: [thredds] Projection issues

• To: Robb Kambic <rkambic@xxxxxxxxxxxxxxxx>
• Subject: Re: [thredds] Projection issues
• From: Kyle Shannon <ksshannon@xxxxxxxxx>
• Date: Tue, 12 Jan 2010 15:31:20 -0700

It seems that my dataset's particular spatial reference was not supported by
my software.  I believe it is on that end, and I am working on fixing it on
that side.  Thanks for everyones help.

kss

# ===================
Kyle Shannon
Physical Science Technician
RMRS Fire Sciences Lab
Fire, Fuels & Smoke - RWU 4405
5775 Highway 10 W.
Missoula, MT 59808
(406)646-6577
kshannon@xxxxxxxxx
ksshannon@xxxxxxxxx
# ===================


On Wed, Jan 6, 2010 at 8:03 AM, Robb Kambic <rkambic@xxxxxxxxxxxxxxxx>wrote:

> As a follow up, the subset service was use to extract dew point temperature
> and the returned netcdf file had the following coordinates with
> standard_parallel = 25.0
>
> Robb...
>
> Coordinate System = time1 y x
>  Time    double time1(time1=196);
>     :units = "hours since 2009-11-21T12:00:00Z";
>     :long_name = "forecast time coordinate";
>     :standard_name = "time";
>     :_CoordinateAxisType = "Time";
>
>  GeoY    double y(y=689);
>     :units = "km";
>     :long_name = "y coordinate of projection";
>     :standard_name = "projection_y_coordinate";
>     :grid_spacing = "5.07947216796875 km";
>     :_CoordinateAxisType = "GeoY";
>
>  GeoX    double x(x=1073);
>     :units = "km";
>     :long_name = "x coordinate of projection";
>     :standard_name = "projection_x_coordinate";
>     :grid_spacing = "5.079361328125 km";
>     :_CoordinateAxisType = "GeoX";
>
>  Coordinate Transforms
>  Lambert_Conformal type=Projection
>
>    grid_mapping_name = lambert_conformal_conic
>    latitude_of_projection_origin = 25.0
>    longitude_of_central_meridian = 265.0
>    standard_parallel = 25.0
>    impl.class= ucar.unidata.geoloc.projection.LambertConformal
>
>
>
>
> On Tue, 5 Jan 2010, Kyle Shannon wrote:
>
>  Hello all,
>> I am using the unidata thredds server to download some NDFD data.  I
>> noticed that
>> the projection specified is a Lambert_Conformal_Conic_2SP and both
>> standard
>> parallels are specified as 0.   In the metadata, if I am reading it
>> correctly, the
>> projection is actually a Lambert_Conformal_Conic_1SP with a standard
>> parallel of
>> 25.  I am using GDAL to hangle the files and proj4 has trouble with the
>> 1st
>> scenario, but not the second.  Is the projection set at the source (NOAA
>> NDFD) or
>> by the NetCDF subsetting service?  Who can I contact to deal with this
>> issue?
>> Thanks.
>>
>> kss
>>
>> # ===================
>> Kyle Shannon
>> Physical Science Technician
>> RMRS Fire Sciences Lab
>> Fire, Fuels & Smoke - RWU 4405
>> 5775 Highway 10 W.
>> Missoula, MT 59808
>> (406)646-6577
>> kshannon@xxxxxxxxx
>> ksshannon@xxxxxxxxx
>> # ===================
>>
>>
>>
>
> ===============================================================================
> Robb Kambic                                Unidata Program Center
> Software Engineer III                      Univ. Corp for Atmospheric
> Research
> rkambic@xxxxxxxxxxxxxxxx                   WWW:
> http://www.unidata.ucar.edu/
>
> ===============================================================================
>

• References:
  • [thredds] Projection issues
    • From: Kyle Shannon
  • Re: [thredds] Projection issues
    • From: Robb Kambic