In this study, the test system. Through Emulator Control of Developer tool in which case the Na to actual use. To find the factors which affect the accuracy and precision of the system, which result from the ability of equipment GPS and efficiency of communication systems.For example, in some way, or some situation of equipment and signal GPS GPRS will be reduced as in if the letter or areas with heavy rain or a thick cloud, Make the system to send data error, or send data.Any resulting from the calculation, display error, such as location, time and speed of the train. The display of the map also depends on the stability of Google Map use Google Map API found that sometimes Layer drawn down.Or sometimes the map was not displayed when a Source Code series ever.
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