Daisuke Kitayama

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Although location-based information systems can now be accessed from mobile devices, searching for information from an outdoor environment requires a significant amount of effort given the time-consuming manipulations that need to be made. Augmented-Reality (AR) based systems can help resolve these issues by reducing the physical effort required to input(More)
In this paper, we propose a method of enhancing digital map interface by reflecting users' intentions by means of automatically restructured maps. Extracted from the sequences of the users' map operations (zooming, centering, and panning), the users' intentions determine the types of objectives based on the sequence patterns or the semantic relation between(More)
With the increasing employment of the Web in our daily lives, we often use it to find evidence of real-world events. The difference with normal web searches is that users want to reveal whether an event is true or false based on firm facts. In this paper, we propose a model to excavate real-world events from the Web, to manage the vestige in spatio-temporal(More)
Digital maps is widely used and appears on all types of platforms for integrating content. However, map media contain a large amount of content and updates. In addition, update times are different for each supplier. Digital maps often display nonexisting geographical objects or do not display newly created geographical objects. In other words, map media has(More)
Digital map services and search services for geographical information are widely available on the Internet. Users can retrieve suitable geographical information using these digital maps through certain map operations and category selections. However, when a map region includes a large amount of information, it can be difficult for users to find specific(More)