| 摘要 |
PROBLEM TO BE SOLVED: To quickly output information relating to a designated point, while suppressing increase of a data amount.SOLUTION: With respect to each of a plurality of mesh areas obtained by dividing an area within a prescribed range like a mesh, a group identifier of a group in which relevant information is common among mesh areas is stored in a map storage part in association with the mesh areas, and the relevant information in each group is stored in a data storage part in association with the group identifier of the group. Coordinate information specifying a point on a map is received, and a mesh area including the point designated by the coordinate information is identified, and relevant information in the identified mesh area is outputted by referring to the map storage part and the data storage part. |
