Google Earth Engine ——全球JRC/GSW1_2/Metadata数据集的观测数据

This dataset contains maps of the location and temporal distribution of surface water from 1984 to 2019 and provides statistics on the extent and change of those water surfaces. For more information see the associated journal article: High-resolution mapping of global surface water and its long-term changes (Nature, 2016) and the online Data Users Guide.

These data were generated using 4,185,439 scenes from Landsat 5, 7, and 8 acquired between 16 March 1984 and 31 December 2019. Each pixel was individually classified into water / non-water using an expert system and the results were collated into a monthly history for the entire time period and two epochs (1984-1999, 2000-2019) for change detection.

This product contains metadata about the observations that went into computing The Global Surface Water dataset. Areas where water has never been detected are masked.

该数据集包含1984年至2019年地表水的位置和时间分布图，并提供这些水面的范围和变化的统计数据。更多信息见相关期刊文章。全球地表水及其长期变化的高分辨率地图（自然，2016）和在线数据用户指南。

这些数据是使用1984年3月16日至2019年12月31日期间获取的Landsat 5、7和8的4,185,439个场景生成的。使用专家系统将每个像素单独分类为水/非水，并将结果整理为整个时间段的月度历史和两个纪元（1984-1999，2000-2019）的变化检测。

该产品包含计算全球地表水数据集的观测数据的元数据。从未检测到水的区域被掩盖了。

Dataset Availability

1984-03-16T00:00:00 - 2020-01-01T00:00:00

Dataset Provider

EC JRC / Google

Collection Snippet

ee.Image("JRC/GSW1_2/Metadata")

Resolution

30 meters

Bands Table

* = Values are estimated

数据使用：

All data here is produced under the Copernicus Programme and is provided free of charge, without restriction of use. For the full license information see the Copernicus Regulation.

Publications, models, and data products that make use of these datasets must include proper acknowledgement, including citing datasets and the journal article as in the following citation.

If you are using the data as a layer in a published map, please include the following attribution text: 'Source: EC JRC/Google'

引用：

Jean-Francois Pekel, Andrew Cottam, Noel Gorelick, Alan S. Belward, High-resolution mapping of global surface water and its long-term changes. Nature 540, 418-422 (2016). (doi:10.1038/nature20584)

代码：

var dataset = ee.Image('JRC/GSW1_2/Metadata');
var visualization = {
  bands: ['detections', 'valid_obs', 'total_obs'],
  min: 100.0,
  max: 900.0,
};
Map.setCenter(71.72, 52.48, 0);
Map.addLayer(dataset, visualization, 'Detections/Observations');