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Join Date: 2016-03-28
Posts: 3
Posted: 2018-01-12 04:58:42 PM

What does "Accuracy" mean in the info shown when you click on a marker? Does the distance in meters mean that the GPS is in that meter radius? I''ve noticed that it can be as low as 20 meters and can go up to 180 meters. That''s a wide range. Is there a way to capture the location in a more accurate way? When I am looking at a neighborhood, there are times when I''m seeing markers jump from one house to another in a span of 30 minutes and wonder how accurate the reading is. Can you please explain how I should interpret this data? Thanks.

Best of the Best

Join Date: 2010-01-27
Posts: 1453
Posted: 2018-01-12 10:02:52 PM

The accuracy term is very technical. Just bear in mind that the smaller value, the more accurate. Here is the technical definition.

We define accuracy as the radius of 68% confidence. In other words, if you draw a circle centered at this location''s latitude and longitude, and with a radius equal to the accuracy, then there is a 68% probability that the true location is inside the circle.

In statistical terms, it is assumed that location errors are random with a normal distribution, so the 68% confidence circle represents one standard deviation. Note that in practice, location errors do not always follow such a simple distribution.