Location Identification by GPS and Images of Mobile Phones

In recent years, network applications with location-awareness have been attracting a lot of attention as a technical element for ubiquitous computing. Among such applications, those for environmental issues especially requires, for the sake of immediate detection and providing solutions, a high precision of auto-detected location information of relevant places. In order to realize the precision, technical challenges will be evaluation of the precision of GPS information and how to improve it. So far, these issues have rarely been studied, however. In this paper, we consider especially mobile applications on mobile phones, first to evaluate the precision of GPS information on mobile phones, and second to study how to improve the precision. According to these results, we discuss the possibility of applying location information on mobile phones to the environmental issues and future technical problems.