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 <[email protected]
<mailto:[email protected]>> 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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