Thread: GPS location
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Old 12-23-2008, 08:56 PM   #12 (permalink)
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Lightbulb GPS Position

GPS maps is useless for position. 2500 to 3900 meters is not really a position, it is more like saying what state you are in.

I have spent some time comparing BBMaps and VZNAv. To my surprise, there is a significant difference in accuracy. I have conducted these tests while parked in my car, so movement is not a consideration. I have found that under these conditions, VZNav is correct to within a coupe of meters (one to two car lengths at most), while BB Maps is only good to 50 or 100 feet.

I have also compared the moving map modes. Again, VZNav is extremely accurate while BBMaps is 30 to 50 meters off.

One would think that since both programs use the same chip the position produced would be the same. My experience says it is not. 73
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