A Spatial Skyline Query for a Group of Users Having Different Positions

We consider a problem of skyline query of a spatial database. Assume that members of a multidisciplinary task force team located at different offices want to put together in a restaurant to hold a lunch-on meeting. In this situation, we should select a good restaurant whose location is convenient for each member. Skyline query is helpful for finding a good restaurant. We can compute a set of skyline restaurants based on non-spatial attributes such as price and rating by using conventional skyline queries. However, conventional skyline queries do not consider distance from each user, which must be important for selecting a restaurant in the example. If users´ locations are different, the comparison of restaurant´s location is complicated. For example, if one restaurant is very close to one user, it may be far from another user. In this paper, we consider a spatial skyline query for a group of users having different positions. The proposed method selects a set of spatial objects whose location for the group is not dominated by another spatial objects.