Research on Spatial Keyword Query Method Based on Collective Object

With the rapidly development of localization technology, services based on location has been widely used in mobile users currently. This leads to the incessant appearing of various mobile equipment with localization technology, location-based and text-based searching technologies are furthermore proposed. To meet this explosive searching requirements, many effective spatial keyword searching algorithms have been developed based on the searching conditions. The road network is the abstraction of people’s living space, which has more practical importance and value. In this paper, a road network-based collection and direction-oriented spatial keyword effective searching method is proposed, including main keyword-oriented searching and no main keyword-oriented searching. No center-oriented searching starts from the searching point and expands the search in the searchable range. During the center-oriented searching, spatial objects that can meet the main keyword are found in the searchable range firstly. Then the expanding search is conducted in the searchable network, which starts from the spatial object. Finally, the above two searching methods are conducted and the re-sults show the efficiency of the algorithm.