| 摘要 |
A spatial data service system includes a spatial data output client 10 and a spatial data server 20. The spatial data output client 10 progressively displays on a user's screen spatial data which has been progressively received from the spatial data server 20. Thus, the user can save time required for confirming the spatial data. Further, time consumed for processing a request for additional spatial data, if any, can be reduced. Still further, since transmission of unnecessary data is efficiently avoided, a network load can be lowered, resulting in reduction of additional costs that might be caused due to the network load.
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