[bluGill]

The problem with gps is it doesn't work (reliably) under trees which many lawns have. Since trees are common in yards they need something else anyway and at that point you can get rid of the gps

[typpilol]

Need to get the multi-gnss like my cycling computer from Garmin has

It's so accurate it's scary. Shows me the what side of the road I'm on and even shows me how much I'm in the lane lol

[bluGill]

that doesn't help when there is no signal which happens. Sometimes you can use other input to get more accurate, but only sometimes