Lakes and Rivers

The water transition maps visualise the changes in water state between the first year and the last year of observation. The map available include:

• Permanent water surfaces (i.e. area where water is always observed) • New permanent water (i.e. conversion of a no water place into a permanent water place) • Lost permanent water (i.e. conversion of a permanent water place into a no water place) • New seasonal water (i.e. conversion of a no water place into a seasonal water place) • Lost seasonal water (i.e. conversion of a seasonal water place into a no water place) • Conversion of permanent water into seasonal water • Conversion of seasonal water into permanent water

Source: The surface area measurements reported here have been extracted from the Global Surface Water Explorer (GSWE) developed by the European Commission Joint Research Centre and Google. A coastline mask has been applied to prevent ocean water being included in the data. The analysis applied a consistent algorithm to all 36 years of the Landsat and Sentinel observations.

Data and Resources

This dataset has no data

Additional Info

Field	Value
Source	https://app.mapx.org/static.html?views=MX-ZE4ZU-YR5PG-9Y03Z&zoomToViews=true#JAAc6
Author	UNEP/GRID-Geneva
Maintainer	UNEP/GRID-Geneva
Last Updated	December 7, 2022, 08:16 (UTC)
Created	December 7, 2022, 08:16 (UTC)
GUID	MX-ZE4ZU-YR5PG-9Y03Z
Issued	2021-04-20 11:11:47
Language	EN
Modified	2022-04-04 12:23:13
Publisher email	info@mapx.org
Publisher name	UNEP/GRID-Geneva
Theme	Web Map
data_type	geospatial
keywords_m49	WLD
projects_description	World Environment Situation Room: Water
projects_id	MX-70L-6MZ-5FF-DTH-CWW
projects_title	WESR: Water
range_end_at_year	2022
range_start_at_year	1984
source_abstract	The water transition maps visualise the changes in water state between the first year and the last year of observation. The map available include: • Permanent water surfaces (i.e. area where water is always observed) • New permanent water (i.e. conversion of a no water place into a permanent water place) • Lost permanent water (i.e. conversion of a permanent water place into a no water place) • New seasonal water (i.e. conversion of a no water place into a seasonal water place) • Lost seasonal water (i.e. conversion of a seasonal water place into a no water place) • Conversion of permanent water into seasonal water • Conversion of seasonal water into permanent water Source: The surface area measurements reported here have been extracted from the Global Surface Water Explorer (GSWE) developed by the European Commission Joint Research Centre and Google. A coastline mask has been applied to prevent ocean water being included in the data. The analysis applied a consistent algorithm to all 36 years of the Landsat and Sentinel observations.
source_title	Water Transitions (1984-2018)
spatial	WLD