中国北方1km沙漠化土地分布数据集（2000年）

为了更准确了解我国北方现代沙漠化土地时空变化规律，从国家层面收集、整编和更新现代沙漠数据集这些资料，在遥感和地理信息系统等技术支持下，参考已有沙漠化调查监测成果，以Landsat系列影像数据为主要信息源，按同一解译标准、以人机交互方式通过比较提取不同类型、不同程度沙漠化土地信息，形成中国北方地区2000年的沙漠化土地分布现状数据，并通过地面观测、调查进行精度验证和评价后建立数据库。

To accurately understand the spatio-temporal variation rules of modern desertified lands in northern China, we collected, compiled and updated national-level modern desertification datasets. Supported by remote sensing and geographic information system technologies, and referring to existing desertification survey and monitoring results, we adopted Landsat series image data as the primary information source. Following consistent interpretation standards, we extracted information on desertified lands of various types and degrees through human-computer interactive comparison, thus establishing the current distribution data of desertified lands in northern China in 2000. After conducting accuracy verification and evaluation via ground observations and surveys, a corresponding database was finally established.