초록 ▼

A terminal device has a controller and a memory medium. The controller receives the latest map data from an information center to update map data stored in the memory medium. For updating, a user selects map data to be updated from map data groups by designating a selection condition via an input de

A terminal device has a controller and a memory medium. The controller receives the latest map data from an information center to update map data stored in the memory medium. For updating, a user selects map data to be updated from map data groups by designating a selection condition via an input device. Selection condition concern "location," "area (area size)," and "scale." After map data which meets the designated condition is selected, the controller updates the selected map data. With the above arrangement, a selection operation is simplified. Also, the controller determines "area" and "scale" candidates (defaults) and recommends them to the user by displaying them in a display. The candidates are determined such that the total volume of selected map data falls within a predetermined volume. Looking at the displayed candidates, the user easily set appropriate selection conditions.

대표청구항 ▼

[ What is claimed is:] [1.] A map data processing device mounted on a terminal device having terminal map data storing means storing a map data group, comprising;designation means for designating a desired location, a desired area size, and a desired map scale;selection means for selecting from the

[ What is claimed is:] [1.] A map data processing device mounted on a terminal device having terminal map data storing means storing a map data group, comprising;designation means for designating a desired location, a desired area size, and a desired map scale;selection means for selecting from the map data group stored in the terminal map data storing means, map data on the map scale designated covering the location designated and the area size designated;communication means for communicating with an information center, the center having center map data storing means storing a latest map data group;comparison means for comparing the chronological order of the map data selected and corresponding map data stored in the center map data storing means using the communication means; anddisplay means for displaying the result of comparison so that a user acknowledges the result.