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1 American Memory - Map Collections - Conservation and Environment 开放资源 机器抓取
  The Conservation and Environment map collection, part of the Library of Congress American Memory historical collections series, contains cartographic items chronicling the environm...
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2 The Environment Directory -- Science 开放资源 机器抓取
  This site offers a list of commercial providers of services comprising a wide range of environmental topics, links to departments, societies and institutions.;...
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3 About.com -- Geography 开放资源 机器抓取
  Tools for geographers of the United States including Vicinity MapBlast which produces US street maps, lists of languages spoken around the world, and summary data for US counties. ...
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4 全国1:100万基础地理信息共享平台数据库 开放资源 机器抓取
  全国1:100万基础地理信息共享平台数据库基于国家基础地理信息系统全国1:100万数据库。 国家基础地理信息系统全国1:100万数据库于1994年完成,其数据源为全国1:100万地形图(内部版)。数据处理步骤为:数据源选择、予处理、水系和等高线版扫描和矢量化处理、其它要素手扶跟踪数字化、数据编辑处理、建立拓扑关系、接边处理、投影转换、与地名数据...
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5 Degree Confluence Project 开放资源 机器抓取
  The project is an organized sampling of the world. There is a confluence within 49 miles (79 km) of you if you're on the surface of Earth. We've discounted confluences in the ocean...
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6 Coordinate Data Conversion© version 3.0 未开放资源 机器抓取
  CDC converts coordinate data in any DOS-ASCII, formatted, text file, or any ODBC data source, with complete user control of output format. The program has an intuitive, visual, eas...
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7 Geography & Map Division 开放资源 机器抓取
  The Geography and Map Division (G&M) has custody of the largest and most comprehensive cartographic collection in the world with collections numbering over 4.6 million maps includi...
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8 Environmental Organization WebDirectory: Geography 开放资源 机器抓取
  This site offers a list of commercial providers of geography-related services, addresses of departments and institutions as well as further links to geography related sites.;...
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9 The Environment Directory 开放资源 机器抓取
  This is a directory of links to lots of environmental organizations websites bu subject. Topics cover science, agriculture, forestry, sustainable development, energy, wildlife, etc...
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10 HeiDOK - The Document Repository of Heidelberg 开放资源 馆员登记
  HeiDOK is the Open Access platform at Heidelberg University. It provides members of the university with the opportunity to publish their research output for free, according to the ...
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