CONVERTING METHOD FOR SPATIAL DATABASE AND PROCESSING METHOD FOR USER QUERY TO THE CONVERTED SPATIAL DATABASE

摘要

PURPOSE: A user query processing method for a space database and change method of the space database are provided to offer a high quality location based service to a user by supporting an accurate query processing method for a change result database. CONSTITUTION: A data distribution change unit(212a) divides an original space database into one or more division areas. The data distribution change unit changes the data distribution of the space database divided into the division areas. A line symmetry change unit(212b) symmetrically move coordinate information within the space database which the data distribution is changed. An error insertion unit(212c) inserts errors into coordinate information of a result which symmetrically moved based on the established error rates. The error insertion unit stores the coordinate information including the errors in a change result database corresponding to the original space database.