Jon,
just to make you think twice:
How will ncWMS display data without datum? Using netcdf-java's default?
I think 1) and 2) are both valid and I propose a something like:
All geo-data must come with the best datum information. Missing
ellipsoid-information will be interpreted as 3671km sphere. Missing
Bursa Wolf parameters will be interpreted as all 0.
This would discourage using the default, but at least it is written
down. And the default ellipsoid is discouraging enough in itself for
anybody caring about ellipsoids, but nicely backwards compatible.
Heiko
On 2011-08-03 16:30, Jon Blower wrote:
John -
1) possible recommendations by CF to always include the datum, and making sure
we have the right metadata to do so.
2) possible recommendations by CF as to what to do if the datum is not present,
or is only partially specified.
yes I think that's right. Personally I'm not in favour of a default datum - if
the datum is unknown this should be expressed clearly.
Jon
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