Accuracy of GPS units is pretty much dictated by the sensitivity of the antenna, the number of satellites acquired, and the time you dwell at each point. All the handhelds use pretty much the same small patch antenna, and will have similar accuracy. That accuracy, for area measurement, is much better than the accuracy they display. The displayed accuracy is an absolute value, and what matters for acreage and distance measuring is the relative value. Just about any handheld will be more than adequate for anything short of a legal survey. If you need better, get a handheld that has an external antenna input connection, and buy or rent a good antenna. Antennas can get pretty pricey, though. Expect a good surveyor quality antenna to be up in the high hundreds or even thousands of dollars.
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Today's Featured Article - Restoring a John Deere 2010 Diesel Tractor - by Jim Nielsen. Following seven years working in California's Silicon Valley, my wife, baby son and I moved back to Australia to retire. We bought a small 'farm' of about 50 acres near Bendigo, in the state of Victoria. I soon found that it would be very useful to have a tractor around the place for things such as grading our long drive and brush-hogging the fields. I was also embarking on planting 1000 eucalyptus trees, and hence I would need a ripper, small disk plow, sprayer etc. to get these things accompli
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