[CF-metadata] Re: GDV convention

[John Caron]

>
>
>>
>>With regard to  " x and y km units, when the distance of x1 and x2 
>>depends on the y-value". Typically the x and y are independent when they 
>>are expressed in units of "km on the projection plane".  The lat and lon 
>>are then functions of both x and y, eg lat(x, y) and lon(x,y).  I will 
>>see what examples I can find.
>>
>>I am forwarding this message to the CF discussion group, perhaps someone 
>>has an example of this in CF?
>>
>>    
>>
>
>Hi John,
>
>>From the User's Manual for the "proj" software I find:
>
>  The units of cartesian data are determined by the units used to define
>  the Earth's radius or ellipsoidal axes which are typically in meters.
>
>FYI, the proj software is now being maintained at
>http://www.remotesensing.org/proj.
>
>Brian
>  
>
yes, i agree, i didnt mean to privilege "Km" over any other unit of 
length. What i meant to say is that the "data projection" is usually the 
projection in which the x and y coordinates are independent,  eg, the 
model was run on a "60 km grid on a stereographic projection" etc.