What is the typical range of the other values? As a sanity check, I re-binned a 1440x720 data set with all the values set to 1e20 to a 720x360 data set. All the values returned were 1e20. David -Harris GS

The other values are all between 0 and 1 - in the particular example year and variable I'm looking at, mostly they are 0. I am getting values 2e20, 1.5e20, 1e20 and 5e19 (other then the expected values in the 0 range).

Ok, I see what happened - my mistake, was regridding an array that I had added to another. On another note - is there a way to do the rebinning without including the 1e20 values? For example, if a grid point is half or more land, I would rather not discount that value just because the rebinning is including the large ocean value. But I don't see any way to do that with rebin, and no simple nearest neighbor average with griddata - which, in any case, was taking a really long execution time, which is why I went to rebin in the first place.

Perhaps you can replace the 1e20 values with !Values.fnan and then use MEAN to treat the values as missing data using the technique mentioned in the following article: http://www.idlcoyote.com/...ips/rebinmissing.php