In article , Jarle H Knudsen
writes
1 for each grid cell
2 best := infinity
3 for each station on the list
4 d := (distance from station to cell) squared
5 if d best then best := d
6 cell value := sqrt (best)

Why does the distance need to be squared in line 4?

What is the formula for distance between two points on a Cartesian grid?

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