cyclones30 - 10/20/2014 11:34

Each of those map types might take a different setting. (and probably should)  A couple questions/comments. A "spread map" is.....a prescription you made to then go and do some spreading? Or a map from the spreader of what you did already? That will make a big difference. 

Your grid size isn't that important. If you're using Kriging for harvest and either "spread map" option above, you have your hands full. I just took a semester class on it and still don't have it down perfectly. Soil sampling would be possible, but my version doesn't even let me use Kriging for harvest. Call support if you'd like to use Kriging, help via text is impossible.

That said, I'd start with Inverse Distance since that's what I'd guess 99% of all users use. Your grids are ~330 ft apart at that size, so I'd set the max. distance to something just under that so they don't overlap values. The distance ratio needs to be between 0 and 1, try a couple lower than 0.5 since those points are pretty scattered. 

Yield inverse distance, points are much closer together so lower the max distance a lot. (trial and error depending on head size etc) I'd stick with the default setting of 0.6 for the ratio unless it still looks bad. Then change from there.

No idea for spread maps.