| 摘要 |
An acquiring unit (101) acquires traveling state information indicating a traveling state of a mobile object. A position identifying unit (102) identifies the current position of the mobile object, based on the traveling state information and map information. If the current position of the mobile object identified to be on a road is subsequently identified not to be on any road, a registering unit (103) registers into a storage unit, a deviation point from the road as an entrance point to a parking lot. When a new deviation point is registered as an entrance point to the parking lot, if an entrance point in the vicinity of the new deviation point is already registered, the registering unit (103) determines whether the new deviation point is to be newly registered as an entrance point to the parking lot based on information about the entrance points.
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