As I understand, scientists often use reference systems more complex
than can be represented using the WKT. So it might not be good to fully
depend on WKT, but having an optional attribute which can be used
whenever possible might be a good idea.
Upendra
Kyle Shannon wrote:
> I don't believe there are any such tags for TOWGS84. I would like to
> see a more conformance or integration with OGC WKT as well. This
> could take the form of spatial reference well known text or proj4
> definitions. For the spheroid in cf, you have to specify earth_radius
> and inverse_flattening or semi_major_axis and semi_minor_axis. I
> think longitude_of_prime_meridian is in there too. The other
> grid_mapping tags are for projected coordinate systems.
>
>
>
> -Kyle
>
>
> On Wed, Mar 3, 2010 at 12:21 PM, Upendra Dadi <Upendra.Dadi at noaa.gov
> <mailto:Upendra.Dadi at noaa.gov>> wrote:
>
> Hi,
> I am new to CF convention. I am looking at how to incorporate
> coordinate system information in the netcdf file. Referring to the
> CF documentation, I found that there are parameters like
> grid_mapping_name, semi_major_axis, longitude_of_prime_meridian,
> etc to describe the coordinate system.But I haven't found any
> attributes for specifying Bursa Wolf transformation parameters
> (equivalent of TOWGS84 in WKT). Or am I missing something? These
> parameters may be required when I am using data which is not based
> on WGS 84 datum in order to be able to apply proper
> transformation. Thanks.
>
> Upendra
>
>
>
>
>
>
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Received on Wed Mar 03 2010 - 13:41:38 GMT
