I don't know if your looking to be spot on or just fairly close to your corners but I have drawn maps in the past using google maps and can transfer it to my phone through google earth when I'm in the woods and needing to stay on the property line or find the corner when I get off track. Not sure if that helps any but good luck.. Also when drawing the lines it shows the distance of how long your line is so if you know how many ft are in a mile then you can go from there and end up with the correct acreage drawn out.
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