Global Water Driver Download

Posted By admin On 20.04.21

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Global Water Driver Download

License

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.

Citation

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)

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

Data Users Guide

For a description of all of the datasets and details on how to use the data please see the Data Users Guide.

Delivery Mechanisms

All of the datasets that comprise the Global Surface Water 1984-2019 are being made freely available using the following delivery mechanisms: Global Surface Water Explorer, Data Download, Google Earth Engine and Web Map Services. These are described in the following sections.

Global Surface Water Explorer

The Global Surface Water Explorer is a simple web-mapping tool that shows all of the water datasets and allows users to navigate the globe visualizing the water datasets without installing any software. It also allows users to view the complete history of water detections over the 36-year period by clicking on the map. The tool is intended as a data viewer and does not provide any analytical features - if you would like to do your own analysis on the data then access the data using Data Download or Google Earth Engine. Explore the map.

Data Download

Currently all of the mapped datasets are available to download (i.e. occurrence, change, seasonality, recurrence, transitions and maximum extent). The water history datasets and metadata datasets will be made available in the near future.

Download process

Individual 10°x10° files

The Global Surface Water data are available to download in tiles 10°x10° from the map shown below. Click on the tile to show a list of the available datasets. Each one of these datasets is a hyperlink to the *.tif file.

Full dataset

The full global surface water datasets can be downloaded by using this Python 2 script or using this Python 3 script . The zip file contains the Python script and a set of instructions for using it.
An handy alternative way to download this data is to use the following script wrote by Petr Tsymbarovich, available at this GitHub link.

Supporting files

Symbology

Each of the downloadable files contains a colormap which will display the files in desktop GIS tools (such as QGIS or ArcGIS) using the symbology that has been used in the Global Surface Water Explorer. However, these colormaps do not contain the labels for the values. These can be added to the files by using the following symbology files. For instructions on how to use these files see the 'Using Symbology Files' section of the Data Users Guide.

Dataset	QGIS	ArcGIS
Occurrence	occurrence.qml	occurrence.tif.lyr
Occurrence change intensity	change.qml	change.tif.lyr
Seasonality	seasonality.qml	seasonality.tif.lyr
Recurrence	recurrence.qml	recurrence.tif.lyr
Transitions	transitions.qml	transitions.tif.lyr
Maximum water extent	extent.qml	extent.tif.lyr

There are also symbology files where the above palettes are unsuitable for users with deuteranopia colour-blindness:

Dataset	QGIS	ArcGIS
Occurrence change intensity	change_deuteranopia.qml	change_deuteranopia.tif.lyr
Transitions	transitions_deuteranopia.qml	transitions_deuteranopia.tif.lyr

There are no symbology files for the monthly or the yearly water history as files are encoded and must be decoded before they can be mapped.

Metadata

The downloadable files do not contain any metadata information and so it is provided here for each of the datasets. You may need to right click and Download Linked file.

Dataset	ISO 19139 Metadata file
Occurrence	occurrence.xml
Occurrence change intensity	change.xml
Seasonality	seasonality.xml
Recurrence	recurrence.xml
Transitions	transitions.xml
Maximum water extent	extent.xml

Google Earth Engine

Tutorials for using the Global Surface Water Dataset in Google Earth Engine are available here.

Asset ids

The data can also be accessed and used in the Google Earth Engine platform - for more information see here. The following asset ids are used in Google Earth Engine:

Dataset	Asset ID 1984-2015	Asset ID 1984-2018	New Asset ID 1984-2019
Map layers	JRC/GSW1_0/GlobalSurfaceWater	JRC/GSW1_1/GlobalSurfaceWater	JRC/GSW1_2/GlobalSurfaceWater
Yearly Seasonality	JRC/GSW1_0/YearlyHistory	JRC/GSW1_1/YearlyHistory	JRC/GSW1_2/YearlyHistory
Monthly History	JRC/GSW1_0/MonthlyHistory	JRC/GSW1_1/MonthlyHistory	JRC/GSW1_2/MonthlyHistory
Monthly Recurrence	JRC/GSW1_0/MonthlyRecurrence	JRC/GSW1_1/MonthlyRecurrence	JRC/GSW1_2/MonthlyRecurrence
Metadata	JRC/GSW1_0/Metadata	JRC/GSW1_1/Metadata	JRC/GSW1_2/Metadata

Web Map Services

The Global Surface Water data can also be used within other websites or GIS clients by using what are called 'Web Map Services'. These services provide a direct link to the cached images that are used in the Global Surface Water Explorer and are the best option if you simply want to map the data and produce cartographic products. They are not suitable for analysis as the data are represented only as RGB images.

Desktop GIS

In ArcGIS for Desktop:
In the ArcCatalog Window, click on GIS Servers and then double click on Add WMTS Servers
In the URL box, enter: https://storage.googleapis.com/global-surface-water/downloads_ancillary/WMTS_Global_Surface_WaterV2019.xml and click OK
Expand the 'Global Surface Water on storage.googleapis.com' item and drag any of the layers onto the map

In QGIS:
In the Manage Layers toolbar, click on Add WMS/WMTS Layer
Click New and enter a name(Global Surface Water) and URL (https://storage.googleapis.com/global-surface-water/downloads_ancillary/WMTS_Global_Surface_WaterV2019.xml)
Click OK and click Connect - select a layer to add to the map

Websites

The Web Map Services can also be used within websites using any Javascript Mapping API that supports tiled layer types. The examples below show you how to create and add the transitions layer in Leaflet v1.0 and then ArcGIS Javascript API v3.18. The layer type can be one of: transitions, occurrence, change, seasonality, recurrence or extent.

Leaflet: