Patent ID: 7647341
Filing Date: 2010-01-12
Classification: G01C

Abstract:
1. A map editing apparatus for editing partial map data acquired from a map database, the map editing apparatus comprising: a control section connected to a map data storing section which stores address index data of a whole country, wherein the map data storing section comprises a recording device, and wherein the address index data of the whole country has a tree structure, and includes name data of states, name data of cities which are children of each of the states, name data of towns which are children of each of the cities, and name data of streets which are children of each of the towns; and wherein the control section executes: a checking process for checking the name data of cities related to the partial map data by using address index data appended to the partial map data; an obtaining process for obtaining a number of cities included in the address index data appended to the partial map data per state, for each of the states corresponding to the name data of the cities obtained by the checking process, by using the address index data of the whole country and the name data of the cities obtained by the checking process; an obtaining process for obtaining a total number of cities per state for each of the states by using the address index of the whole country; and an assigning process for assigning the name data of a state, in which a proportion of the number of the cities included in the address index appended to the partial map data per said state to the total number of the cities per said state is equal to or greater than a predetermined ratio, to the partial map data.