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ROAD AREA EXTRACTING APPARATUS FOR EXTRACTING A ROAD AREA FROM A BLOCK MAP, DEFORMED MAP AUTOMATIC GENERATION SYSTEM FOR GENERATING A DEFORMED MAP FROM ROAD AREA DATA OBTAINED BY THE ROAD AREA EXTRACTING APPARATUS, MAP INFORMATION PROVIDING SYSTEM, GEOGRAPHICAL INFORMATION PROVIDING SYSTEM AND GEOGRAPHICAL INFORMATION DESCRIBING METHOD

US Patent 6714664 · Granted Mar 30, 2004

Estimated economic value: $307,000

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