国家基础地理信息系统1:400万数据(1:400 million data in the national fundamental geographic information system)，介绍我国地理资源的主要内容，包括国界、省界、河流、铁路等的划分和分布情况，分类很具体，数据也很完善-National fundamental geographic information system 1: 4,000,000 Data (1: 400 million data in the nation

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Algorithm developed for Continuous Change Detection and Classification (CCDC) of land cover using all available Landsat data. Please contact Zhe Zhu (zhe.zhu@ttu.edu) at Department of Geosciences, Texas Tech University if you have any questions. CCD