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Digital Chart of the World
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Digital Chart of the World : ウィキペディア英語版
Digital Chart of the World

The Digital Chart of the World (DCW) is a comprehensive digital map of Earth. It is the most comprehensive geographical information system (GIS) global database that is freely available as of 2006, although it has not been updated since 1992.
== Origin ==
The primary source for this database is the United States Defense Mapping Agency's (DMA) operational navigation chart (ONC) 1:1,000,000 scale paper map series produced by the US, Australia, Canada, and the United Kingdom. These charts were designed to meet the needs of pilots and air crews in medium-and low-altitude ''en route'' navigation and to support military operational planning, intelligence briefings, and other needs.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Digital Chart of the World」の詳細全文を読む



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