Whats the weighted smoothing?

[pavetim]

when you go to map properties you see weighted smoothing, most are default 100, what is that for?

[Blacky]

When you select a range of cells to be copied to the clipboard there may be empty cells included in the selection. The software will attempt to "fill in" an empty cell by taking the average of all its neighboring cells. However if an emtpy cell is surrounded by 8 other empty cells then its "fill-in" value cannot be calculated until all its neighbors' values are filled in. The "weighting" value indicates how many times the averaging algorithm is executed in order to fill in the empty cells.
So a value of 100 will pretty much fill in an empty cell that is 100 cells from the nearest non-empty cell. Probably overkill but it means there will be no empty cells in the data copied from the map.
If you want the empty cells to remain empty, then set that value to 0.

Regards
Paul