[postgis-users] Extracting cell values into a matrix

[DavidRA]

I need to do an ordered weighted averaging with the input rasters: assuming
they all have the same extension and characteristics (like pixel size), for
position (1,1) I take the value of every raster, the I sort those values to
assign the weights and finally I compute the average to store it in the
(1,1) position of the output raster. And so on with the rest of the
positions.

As you can see, I need to extract every pixel of every raster.

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