This is one of my favourites. Mappad pro, for android phones. It costs about $4. Here for example, I'm dividing a paddock into two. I'm doing it diagonally so the cows don't have to walk through a wet spot two nights in a row. The paddock is 5.2 Hectares, so I'm doing some adjustment here to get pretty close to 2.6 hectares. I can now save it, and send it to a staff member's smartphone if I want them to put the fence in exactly the right spot. You can also record your tracks for soil sampling, or measure lengths to work out how much poly pipe you need for a project.
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