This dataset contains maps of the location and temporal distribution of surface water from 1984 to 2020 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 4,453,989 scenes from Landsat 5, 7, and 8 acquired between 16 March 1984 and 31 December 2020. 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, 2000-2020) for change detection.

The Monthly Recurrence collection contains 12 images: monthly measures of the seasonality of water based on the occurrence values detected in that month over all years.

该数据集包含1984年至2020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2020年12月31日期间获取的Landsat 5、7和8的4453,989个场景生成的。每个像素都使用专家系统单独分类为水/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年，2000-2020年），用于变化检测。

月度重现率集合包含12张图片：根据所有年份中在该月检测到的发生值，每月衡量水的季节性。

Dataset Availability

1984-03-16T00:00:00 - 2021-01-01T00:00:00

Dataset Provider

​​EC JRC / Google​​

Collection Snippet

​​ee.ImageCollection("JRC/GSW1_3/MonthlyRecurrence")​​

Resolution

30 meters

Bands Table

Name

Description

Min

Max

Units

monthly_recurrence

The recurrence value expressed as a percentage for this month.

0

100

%

has_observations

A flag to indicate if the month has observations.

has_observations Bitmask



  • Bit 0: Observations for the month.
  • 0: No valid observations
  • 1: At least 1 valid observation was available

影响属性：

Name

Type

Description

month

Double

Month

 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.ImageCollection('JRC/GSW1_3/MonthlyRecurrence');

var visualization = {
  bands: ['monthly_recurrence'],
  min: 0.0,
  max: 100.0,
  palette: ['ffffff', 'ffbbbb', '0000ff']
};

Map.setCenter(-51.482, -0.835, 6);

Map.addLayer(dataset, visualization, 'Monthly Recurrence');

Google Earth Engine ——全球JRC/GSW1_3/MonthlyRecurrence数据集的观测数据_html