中国北方1km沙漠化土地分布数据集（2005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2005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 patterns of modern desertified lands in northern China, this study collected, compiled and updated modern desert dataset materials at the national level. Supported by technologies including remote sensing and geographic information systems, and referring to existing achievements in desertification surveys and monitoring, we used Landsat series imagery as the primary information source, adopted a human-computer interaction approach following unified interpretation criteria to compare and extract information on desertified lands of various types and degrees, thereby generating the current distribution dataset of desertified lands in northern China in 2005. After performing accuracy verification and evaluation via ground observations and field surveys, a dedicated database was finally established.