Popularization of mobile devices and advancement of information and communication technology have shifted the public awareness to technology close related to life, which shall change individual's life pattern in everyday life of people, beyond the exi...
Popularization of mobile devices and advancement of information and communication technology have shifted the public awareness to technology close related to life, which shall change individual's life pattern in everyday life of people, beyond the existing spatial information service that provides simple location information. Such a change in awareness has expanded the scope of the existing spatial information service thus far limited to outdoor spaces into indoor spaces, and subsequently the needs for utilization and service of indoor spatial information within a building are expected to increase.
Thus, the Korean government designated indoor spatial information additionally as basic spatial information in order to include and manage it as the national core spatial information in June 2013, and starting from its test implementation in 2012, indoor spatial information has been built up for quasi-public facilities including subway stations and airport until 2014. However, despite the original intent of building up such information, the issues of insufficient institutional review, and the lack of establishing technological levels for technical standards and indoor DB positioning errors existed, and consequently indoor spatial information thus far built up could not be utilized. Particularly, as relevant projects have been promoted only for tangible results under the circumstances where the ways to secure the quality of indoor spatial information to be built up have not been prepared, crucial flaws are discovered in the utility and reusability of the built information due to problems such as the lack of compatibility with application areas. If the basic quality of indoor spatial information is secured by establishing the quality evaluation method considering characteristics of indoor spatial information, it is considered that most of problems generated in the building-up, utilization and exchanges of indoor spatial information will be resolved, but the quality evaluation method for indoor spatial information has not been established to date in Korea.
In this study, the quality evaluation method for indoor spatial information considering the characteristics of the indoor spatial information that has not been established so far was suggested in order to improve the utility of indoor spatial information DB by securing the quality of indoor spatial information to a certain level. To this end, the indoor space characteristics were first defined by analyzing the structure and features of IndoorGML, which is the model standard of the indoor spatial information. Based on this, the elements and classification system of indoor spatial information were divided into geometric space, phase space, and sensor space to establish a quality evaluation method for indoor spatial information.
Elements and sub-elements of quality, and quality evaluation methods and standards were established for the evaluation of the components of indoor spatial information and its quality, which has been built by accommodating common and essential requirements derived through in-depth interviews with experts in each field of indoor space information. Verification experiments were conducted for Wi-Fi-based radio maps, which are currently the most widely used among the quality evaluations for indoor positioning performance where the criteria such as elements of quality should be applied differently according to the indoor positioning method.
Results of verification experiments showed that the data of the quality that allowed indoor path guidance using indoor positioning information could be classified when applying the 95% standard, which is the quality evaluation standard of this verification experiment. However, in case of indoor space information already established, its structure and components were being constructed according to the existing outdoor space information, and thus there is a limit of being unable to include a specific evaluation method for some items. In order to utilize the indoor space information more efficiently in the future, it is required to prepare the standard for building up information in consideration of the components of indoor spatial information presented in this study from the stage of its build-up, and it is also considered that the study on the quality evaluation standard according to various indoor positioning methods needs to be conducted.