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''The National Map'' is a collaborative effort of the United States Geological Survey (USGS) and other federal, state, and local agencies to improve and deliver topographic information for the United States. The purpose of the effort is to provide "...a seamless, continuously maintained set of public domain geographic base information that will serve as a foundation for integrating, sharing, and using other data easily and consistently".〔Moore, Larry (December 2000, with January 2003 update), . United States Geological Survey. Also available as an (HTML document ).〕 ''The National Map'' is part of the USGS National Geospatial Program.〔(National Geospatial Program ), United States Geological Survey.〕 The geographic information available includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures and land cover. ''The National Map'' is accessible via the Web, as products and services, and as downloadable data. Its uses range from recreation to scientific analysis to emergency response.〔 ''The National Map'' is a significant contribution to the National Spatial Data Infrastructure (NSDI) and currently is being transformed to better serve the geospatial community by providing high quality, integrated geospatial data and improved products and services including new generation digital topographic maps. In addition, the National Map is foundational to implementation of the U.S. Department of the Interior (DOI) Geospatial Modernization Blueprint.〔 The USGS also utilizes data from ''The National Map'' Corps, which consists of volunteers who devote some of their time to provide cartographic information on structures.〔(【引用サイトリンク】 ''The National Map'' Corp )〕 ''The National Map'' is the official replacement for the USGS topographic map program.〔Moore, Larry, ''Op. cit.''〕 ==See also== * Microsoft Research Maps (formerly TerraServer-USA) 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「The National Map」の詳細全文を読む スポンサード リンク
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