澜湄流域30m分辨率陆表水体产品

Inland surface water products with 30 m spatial resolution in Lanmei Watershed

本数据集基于Landsat地表反射率数据,采用基于多指数和先验知识驱动的全球尺度遥感水体智能提取方法进行陆表水体信息提取得到。首先进行数据预处理,进行NDWI、NDVI、NDBI和地形指数等指数计算;然后将已有的陆表水体产品作为先验知识,选取水体和非水体样本,并进行样本优化;最后利用决策树模型进行样本训练自适应确定相应指数的阈值,从而生成高精度的陆表水体信息专题图,精度达98%以上,最终结果以GeoTIFF格式保存。本数据集可为澜湄流域水资源安全和管理、气候变化、生态环境等方面提供重要的数据支撑和保障。

The land surface water products with a spatial resolution of 30 m in Lanmei Watershed were produced by using the water intelligent extraction method driven by multi-indexes and prior knowledge on a global scale based on the Landsat 8 surface reflectance data.Data was first preprocessed,and then NDWI,NDVI,NDBI and terrain indexes were calculated.After that,the existing land surface water products were used as prior knowledge to select water and non-water samples and perfect samples.Finally,the decision tree model was used to train samples to determine the adaptive threshold of its corresponding index.Consequently,the high-precision inland surface water thematic map with the accuracy of above 98%was generated.The result is stored in GeoTiff format.This dataset can provide significant data support and guarantee for water resources security and management,climate change,and ecological environment in Lanmei Watershed.