| 摘要 |
PURPOSE: A method for creating a dynamic rough map for a wireless map service is provided to supply a vector map service to a mobile terminal having a memory and a display of a restricted capacity rapidly and exactly by simplifying a source vector map having an information capacity greater than a memory or a display of a mobile terminal and transmitting the source vector map by wireless. CONSTITUTION: A source vector map including a position requested by a user and an object is read from a map database(S21), and transmitted to a mobile terminal through a wireless communication network by wireless. A search map filtered in the source vector map is converted into a three-story medium map, an information capacity of the medium map is reduced by a calculation function such as a selection, a deletion, an integration, an arrangement, an emphasis, or a symbolization with respect to each layer. And a simple medium map is created(S22). A critical value processor checks whether information capacity of the created medium map is greater than a critical value. Objects existing at unimportant area of the map are deleted sequentially by an object selector according to lower importance until a response speed for a wireless transmission is reached(S23). |
