[postgis-devel] Stats

[Paul Ramsey]

No, unfortunately it doesn't work like that. We need a raster system
that can do voxels, not just pixels. If you're thinking about your
image coordinates in terms of i,j, or x,y, you aren't going to be able
to do N-D, no matter how many bands you have available. (Well, not
entirely true, you could hack a 3-d system by having band one be the z
coordinate and band two be the z value, but that's as far as that
trick will take you.)

P.

On Sat, Dec 1, 2012 at 7:51 AM, Sandro Santilli <strk at keybit.net> wrote:
> On Fri, Nov 30, 2012 at 05:19:08PM -0800, dustymugs wrote:
>> I guess my initial answer would be: No, not in the same context as in
>> geometry.
>>
>> Having said that, things like elevation datasets (NED) could have the
>> band pixel values considered the Z axis while the X and Y axes are the grid.
>>
>> I don't know what the fourth dimension would be... time?
>
> How about a dimension each band ?
> Would be a minimum of 3 dimensions per raster.
>
> Can we have that Paul ?
>
> --strk;
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