Patent ID: 7092817
Filing Date: 2006-08-15
Classification: G01C,Y10S

Abstract:
1. A map information retrieving device comprising: a detail data storage unit for dividing an institution's retrieval range into a plurality of meshes, determining a given mesh as a reference mesh, sequentially providing numbers to four meshes in an order of the given mesh as a starting point, top, right, and top right of the given mesh so as to write a letter N in one stroke, moving the reference mesh to a certain mesh, repeating this process to provide the respective meshes with numbers, and sorting and storing institution's detail data in each of the meshes according to the provided numbers; an index data storage unit for storing index data which is used for institution retrieval and is provided for each of a plurality of retrieval methods; an area setup unit for setting an area containing a specified point as a reference on the retrieval range; a mesh number retrieval unit for retrieving a number of a mesh contained in the area; an address acquisition unit for acquiring from index data provided for a retrieval method whose retrieval key contains positional information; an index data acquisition unit for acquiring index data provided for a retrieval method whose retrieval key does not contain positional information; an extraction unit for extracting index data belonging to a range from the address of the institution's detail data stored at the beginning to the address of the institution's detail data stored at the end from the index data acquired by the index data acquisition unit; and a retrieval unit for retrieving a specific institution using the index data extracted by the extraction unit.