How accurate are GPS pedometers for city walking?
On One Hand: GPS Pedometers Can Provide Pinpoint AccuracyGPS uses a network of satellites to determine location on the earth. Using a pedometer with GPS tracking can provide the most accurate reporting of data, which includes: distance, time, speed and number of steps. Many devices may also use the information to determine caloric expenditure.On the Other: Potential Problems with GPS PedometersWhen the GPS device is turned on, it may take two to five minutes to acquire a satellite signal, thus delaying the time to start. Secondly, and more significantly, GPS signals do not travel through walls, and performance is decreased in heavy over-head foliage or when surrounded by tall buildings. When a signal is lost and reacquired, the device simply draws a line from the point where the signal was lost to the point where it was reacquired.Bottom LineGPS pedometers provide extremely accurate information to the user. Although a GPS signal may be lost and reacquired frequently in city-walking, ci
