【摘要】 根据我们一年来对“数字地球”的研究，从地理信息与信息技术发展和信息化社会的角度出发，系统地介绍了“数字地球”涉及的研究内容、关键技术、应用前景等问题，比较客观地阐明了“数字地球”的相关内容。更多还原

【Abstract】 Since the Digital Earth been advanced by Al Gore—the vice presidentof USAon Jan.31 1998 ,the scien tists,entrepreneurs and politicians of many countries have responsed activelytoit ,they allproposed a digitalearth from their own pointofview ,butallofthem didn’tgive a system and overallvision .Based onthe developmentofgeographic information processing and information technology and the requirement of information society, a system and relatively overall description ofdigitalearth is given inthis paper,the research contents,keytechnologies and application prospect are covered .In this way ,a relatively objective description of digitalearth is given .更多还原