I was assuming the OP was talking about iridium (or at least quality) sprinklers, the graphs don't look like good placements for basic sprinklers at all. I gues

I was assuming the OP was talking about iridium (or at least quality) sprinklers, the graphs don't look like good placements for basic sprinklers at all. I guess basic sprinklers do pose a somewhat more interesting problem - then again you use them only for a very short time before moving on... Now if it included scarecrow placement and shortest distance for non-traversable crops like beans, that would be something else...