GEE数据集:来自landsat陆地卫星的全球河流宽度(GRWL)

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此星光明 发表于 2023/03/25 20:24:54 2023/03/25
【摘要】 ​来自陆地卫星的全球河流宽度(GRWL)来自陆地卫星的全球河宽(GRWL)图层是GRWL论文的主要输出,在加入所有子部分后,它非常大,有超过6400万个特征,这是作者提供的子部分文件的组合。你可以在这里阅读该论文前言 – 床长人工智能教程 该资源库由5个文件组成,每个文件都有子部分1) 简化的GRWL向量产品:grwl_SummaryStats_v01_01该shapefile包含以下属性:...

来自陆地卫星的全球河流宽度(GRWL)
来自陆地卫星的全球河宽(GRWL)图层是GRWL论文的主要输出,在加入所有子部分后,它非常大,有超过6400万个特征,这是作者提供的子部分文件的组合。你可以在这里阅读该论文

前言 – 床长人工智能教程 

该资源库由5个文件组成,每个文件都有子部分

1) 简化的GRWL向量产品:grwl_SummaryStats_v01_01

该shapefile包含以下属性:

Index Attribute Description
1 width_min the minimum of river width measurements along the segment at mean discharge (meters)
2 width_med the median of river width measurements along the segment at mean discharge (meters)
3 width_mean the mean of river width measurements along the segment at mean discharge (meters)
4 width_max the maximum of river width measurements along the segment at mean discharge (meters)
5 width_sd the standard deviation of river width measurements along the segment at mean discharge (meters)
6 lakeflag integer specifying if segment is located on a river (lakeflag=0), lake/reservoir (lakeflag=1), tidal river (lakeflag=2), or canal (lakeflag=3)
8 nSegPx number of pixels within the segment (N pixels)
9 Shape_Leng length of the segment (kilometers)

2) GRWL Mask (raster): water_mask_v01_01

该shapefile包含以下属性:

DN Value Classification
DN = 256 No Data
DN = 255 River
DN = 180 Lake/reservoir
DN = 126 Tidal rivers/delta
DN = 86 Canal

3) GRWL Vector Product: water_vector_v01_01

该shapefile包含以下属性:

Index Attribute Description
1 utm_east UTM Easting (UTM Zone is given in tile file name; meters)
2 utm_north UTM Northing (UTM Zone is given in tile file name; meters)
3 width_m wetted width of river (meters) [note: width_m == 1 indicates NA (no width data along the centerline) ]
4 nchannels braiding index (-)
5 segmentID unique ID of river segment in each tile
6 segmentInd Index of each observation in each segment. Not sorted by upstream or downstream
7 lakeflag integer specifying if observation is located on a river (lakeflag=0), lake/reservoir (lakeflag=1), tidal river (lakeflag=2), or canal (lakeflag=3).
8 lon Longitude (decimal degrees)
9 lat Latitude (decimal degrees)
10 elev Elevation (meters) – sampled from the Hydro1k DEM

4) 各个GRWL瓦片的位置图:grwl_tiles

5)按流域划分的河流和溪流表面积总数(Allen & Pavelsky, 2018中的图4):rssa_basins

GRWL矢量产品有一个特征数:64,572,998个特征。

代码

var grwl_summary = ee.FeatureCollection("projects/sat-io/open-datasets/GRWL/grwl_SummaryStats_v01_01");
var water_mask = ee.ImageCollection("projects/sat-io/open-datasets/GRWL/water_mask_v01_01");
var grwl_water_vector = ee.FeatureCollection("projects/sat-io/open-datasets/GRWL/water_vector_v01_01");
var grwl_tiles = ee.FeatureCollection("projects/sat-io/open-datasets/GRWL/grwl_tiles");
var grwl_rssa_basins = ee.FeatureCollection("projects/sat-io/open-datasets/GRWL/rssa_basins");

//Import palette
var palettes = require('users/gena/packages:palettes');

Map.setCenter(-78.2758, 1.663,10)
Map.addLayer(water_mask,{'min':11,'max':125,palette: palettes.colorbrewer.Blues[5]},'GRWL Water Mask')
Map.addLayer(grwl_water_vector.style({fillColor: '00000000',color: 'FF5500'}),{},'GRWL Vector')
Map.addLayer(grwl_summary.style({fillColor: '00000000',color: '0000FF'}),{},'GRWL Vector Simplified')

代码链接:https://code.earthengine.google.com/?scriptPath=users/sat-io/awesome-gee-catalog-examples:hydrology/GLOBAL-RIVER-WIDTH-LANDSAT

Resolution: approx 30m

数据引用Cite the dataset using

Allen, George H., & Pavelsky, Tamlin M. (2018). Global River Widths from Landsat (GRWL) Database (Version V01.01) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.1297434

文献引用:

Allen, George H., and Tamlin M. Pavelsky. "Global extent of rivers and streams."
Science 361, no. 6402 (2018): 585-588.

License

Shared License: This work is licensed under a Creative Commons Attribution 4.0 International License. You are free to copy and redistribute the material in any medium or format, and to transform and build upon the material for any purpose, even commercially. You must give appropriate credit, provide a link to the license, and indicate if changes were made.

Curated by: Samapriya Roy

Keywords: :"GRWL, Fluvial Geomorphology, Hydrology, Rivers, River Width, Landsat, MNDWI"

Last updated: 2021-04-17

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