Re: area of earth

The attached does a pretty good job.
The calculated area is withing 0.02% of 510,072,000 km^2
(which is a rounded number)

D
On 5/13/10 1:08 AM, mark collier wrote:
> Hi,
> I'm wondering why for example 1 in:
>
> http://www.ncl.ucar.edu/Document/Functions/Built-in/wgt_areaave.shtml
>
> that when I multiply area by the number of lons (dimsizes(lon)) (and
> scale to convert m^3 to km^3) that I don't get something approximating
> the accepted value for the area of earth, 510,072,000 km^2
> but half 255,082,544.8610497 ?
>
> I'm using my own "u(lat,lon)" which is global in extent.
>
> Regards,
> Mark.
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