中国城市湖泊高分辨率地图(2020基准年)

中国城市湖泊高分辨率地图（2020基准年）（≥0.001 平方公里）。该地图利用 10 米分辨率的哨兵 2 号卫星影像，结合简单但稳健的水体提取方法，在谷歌地球引擎平台上生成全国水体分布。首先基于城市边界空间关系筛选出城市水体，随后结合高分辨率历史影像手动剔除河流、稻田等非湖泊水体，并对缺失的城市湖泊进行单独编辑补充。通过在随机抽样的城市单元中与人工矢量化结果对比，从湖泊面积和数量两个维度评估数据集精度。结果表明，该数据集具有较高准确性与可信度，面积平均精度达 81.85%，数量平均精度达 93.35%。

High-resolution Map of Urban Lakes in China (Base Year 2020, ≥0.001 km²). This dataset was generated on the Google Earth Engine platform using 10-meter resolution Sentinel-2 satellite imagery and a simple yet robust water body extraction method to produce nationwide water body distribution data. First, urban water bodies were screened based on their spatial relationship with urban boundaries. Subsequently, non-lake water bodies such as rivers and paddy fields were manually removed by combining high-resolution historical imagery, and missing urban lakes were supplemented through separate editing. The accuracy of this dataset was evaluated from two dimensions, namely lake area and quantity, by comparing with manual vectorization results in randomly sampled urban units. The results show that this dataset has high accuracy and reliability, with an average area accuracy of 81.85% and an average quantity accuracy of 93.35%.