地球家园的生动记录：可视地球数字图书馆（Visible Earth）

Visible Earth--A Digital Library of Images and Animations of Our Home Planet

作为美国宇航局（NASA）资助的数字图书馆项目之一，“可视地球”（Visible Earth）．数字图书馆旨在免费向公众提供有关地球科学的图像、动画以及其他的可视化信息，该馆面向学生、教育工作者、科学家、商业人士等，为用户提供了五彩缤纷的可视化地球资源。文章从资源组织、服务特征、技术特征等方面对VE做了概要评述，同时给出了笔者的评价与建议。

Visible Earth Digital Library （VEDL） intends to provide the public with free access to tons of satellite images, animations and data visualizations about the Earth. Highlighting the most spectacular Visual Documents in earth science, VEDL, hosted by NASA, is specially designed for students, educators, scientists, business men and so on to study the Earth. This paper provides an overview of the major development of its digital collection and organization, service provided and technologies employed. Author＇s comments and suggestions are also given.