| 摘要 |
PURPOSE:To reduce the load on retrieval processing, etc., at the time of displaying house map information, etc. CONSTITUTION:An object base 112 regarding a relative object, a map data base 101 regarding figure elements of map data, and an attribute data base 102 regarding figure elements of the map data are stored and substantial object are derived from the object base in response to an inputted command. As a map data substantial object is executed among the derived substantial objects, map data is retrieved from the map data base and as an attribute substantial object is executed, attribute data is retrieved from the attribute data base. The map data is converted into three-dimensional display data according to predetermined height data and displayed.
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