[CF-metadata] definition of direction in direction_of_sea_water_velocity?

From: Bert Jagers <bert.jagers>
Date: Fri, 03 Jul 2009 17:27:23 +0200

Dear Jonathan,

>> "direction_of_sea_water_velocity": how is the direction measured. The
>> standard name table indicates as unit degrees, but it doesn't indicate
>> whether it is degrees from the north counting positive in clockwise
>> direction
>>
> Yes, I believe it is that. It also says it is a "bearing" i.e. like on a
> compass, so I am sure that's what we had in mind. However, I agree that it
> would be helpful for the definition to be more explicit.
>
Thanks! I didn't notice that subtlety in the definition.

Btw. Looking at the wikipedia page on "bearing", it seems that (assuming
an absolute bearing) we are left with the formal question whether it is
a bearing measured with respect to real north, magnetic north or grid
north. I can live with this level of uncertainty.

Best regards,

Bert
Received on Fri Jul 03 2009 - 09:27:23 BST