Google Earth Engine——世界自然基金会（WWF）世界自由流动河流的数据集，这些数据是基于15角秒（赤道上约500米）分辨率的光栅数据。
HydroSHEDS is a mapping product that provides hydrographic information for regional and global-scale applications in a consistent format. It offers a suite of geo-referenced datasets (vector and raster) at various scales, including river networks, watershed boundaries, drainage directions, and flow accumulations. HydroSHEDS is based on elevation data obtained in 2000 by NASA's Shuttle Radar Topography Mission (SRTM).
This dataset provides polylines that represent river networks, derived from and consistent with other HydroSHEDS datasets. These data are based on 15 arc-seconds (approx. 500 m at the equator) resolution raster data.
Mapping the world's free-flowing rivers: data set and technical documentation
Note that the quality of the HydroSHEDS data is significantly lower for regions above 60 degrees northern latitude as there is no underlying SRTM elevation data available and thus a coarser-resolution DEM was (HYDRO1k provided by USGS).
HydroSHEDS was developed by the World Wildlife Fund (WWF) Conservation Science Program in partnership with the U.S. Geological Survey, the International Centre for Tropical Agriculture, The Nature Conservancy, and the Center for Environmental Systems Research of the University of Kassel, Germany.
HydroSHEDS是一个制图产品，以一致的格式为区域和全球范围的应用提供水文信息。它提供了一套不同尺度的地理参考数据集（矢量和栅格），包括河流网络、流域边界、排水方向和流量积累。HydroSHEDS是基于2000年NASA的航天飞机雷达地形任务（SRTM）获得的高程数据。
该数据集提供了代表河流网络的折线，来源于其他HydroSHEDS数据集并与之一致。这些数据是基于15角秒（赤道上约500米）分辨率的光栅数据。
绘制世界自由流动河流的地图：数据集和技术文件
请注意，在北纬60度以上的地区，HydroSHEDS数据的质量要低得多，因为没有基本的SRTM高程数据，因此采用了更粗的分辨率DEM（美国地质调查局提供的HYDRO1k）。
HydroSHEDS是由世界自然基金会（WWF）保护科学项目与美国地质调查局、国际热带农业中心、大自然保护协会和德国卡塞尔大学环境系统研究中心合作开发的。
Dataset Availability
2000-02-11T00:00:00 - 2000-02-22T00:00:00
Dataset Provider
WWF
Collection Snippet
ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers")
引用：
Lehner, B., Verdin, K., Jarvis, A. (2008): New global hydrography derived from spaceborne elevation data. Eos, Transactions, AGU, 89(10): 93-94.
Grill, G., Lehner, B., Thieme, M., Geenen, B., Tickner, D., Antonelli, F., Babu, S., Borrelli, P., Cheng, L., Crochetiere, H. and Macedo, H.E., 2019. Mapping the world's free-flowing rivers. Nature, 569(7755), p.215. Data is available at www.hydrosheds.org
代码：
var dataset = ee.FeatureCollection("WWF/HydroSHEDS/v1/FreeFlowingRivers");
dataset = dataset.style({
color: "B2B2B3",
width: 1.0,
});
Map.setCenter(-73.99172, 40.74101, 12);
Map.addLayer(dataset, {}, "Free Flowing Rivers");