2020年一带一路重要经济廊道节点城市30m不透水面比例空间数据集

不透水面比例是指单位面积内不透水面所占面积，是城市发展和城市生态环境评估的关键指标。2015年一带一路经济廊道重要节点城市30m不透水面比例数据集是为了满足一带一路重要经济廊道重要节点城市生态环境评估的需求，基于2015年的国产高分1号/2号数据/Google Earth影像数据等，经影像分割、分类、聚合反演得到。数据集包括中巴经济走廊、孟中印缅经济走廊、中国-中南半岛经济走廊、新亚欧大陆桥、中国-中亚-西亚经济走廊、中蒙俄经济走廊等六大经济走廊的45个重要节点城市， 2015年一期数据，45个文件，包含不透水面比例一个数据层。

The impervious surface area ratio is defined as the proportion of impervious surface area within a unit area, which serves as a critical indicator for urban development and urban ecological environment assessment. The 30 m impervious surface area ratio dataset for key node cities along the Belt and Road economic corridors in 2015 was developed to address the demand for ecological environment assessment of key node cities in important Belt and Road economic corridors. It was generated based on 2015 data from China's domestic Gaofen-1/2 satellites, Google Earth imagery, and other available sources, through processes including image segmentation, classification, and aggregation inversion. This dataset covers 45 key node cities across six major economic corridors: the China-Pakistan Economic Corridor, Bangladesh-China-India-Myanmar Economic Corridor, China-Indochina Peninsula Economic Corridor, New Eurasian Land Bridge, China-Central Asia-West Asia Economic Corridor, and China-Mongolia-Russia Economic Corridor. It includes the first-phase 2015 data, stored as 45 individual files, with only one data layer: impervious surface area ratio.