Water Occurrence (1984-2019)

The Water Occurrence dataset shows where surface water occurred between 1984 and 2019 and provides information concerning overall water dynamics. This product captures both the intra and inter-annual variability and changes. The occurrence is a measurement of the water presence frequency (expressed as a percentage of the available observations over time actually identified as water). The provided occurrence accommodates for variations in data acquisition over time (i.e. temporal deepness and frequency density of the satellite observations) in order to provide a consistent characterization of the water dynamic over time.

The permanent water surfaces (100% occurrence over 36 years) are represented in blue, and areas where water sometimes occurs are shown in pink through to purple (0% < occurrence < 100%). The paler shades are areas where the water occurs less frequently.

For more detail see: 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) [https://www.nature.com/articles/nature20584]

Data and Resources

This dataset has no data

Additional Info

Field	Value
Source	https://app.mapx.org/static.html?views=MX-AOUNF-ASBTP-JKMAM&zoomToViews=true#JAAc6
Author	UNEP/GRID-Geneva
Maintainer	UNEP/GRID-Geneva
Last Updated	December 7, 2022, 08:14 (UTC)
Created	December 7, 2022, 08:14 (UTC)
GUID	MX-AOUNF-ASBTP-JKMAM
Issued	2017-11-07 18:48:18
Language	EN
Modified	2021-12-01 18:47:02
Publisher email	info@mapx.org
Publisher name	UNEP/GRID-Geneva
Theme	Web Map
data_type	geospatial
keywords_m49	WLD
projects_description	UNEP Colombia
projects_id	MX-SXE-0C1-TTW-KC8-VP4
projects_title	UNEP Colombia
range_end_at_year	2021
range_start_at_year	1984
source_abstract	The Water Occurrence dataset shows where surface water occurred between 1984 and 2019 and provides information concerning overall water dynamics. This product captures both the intra and inter-annual variability and changes. The occurrence is a measurement of the water presence frequency (expressed as a percentage of the available observations over time actually identified as water). The provided occurrence accommodates for variations in data acquisition over time (i.e. temporal deepness and frequency density of the satellite observations) in order to provide a consistent characterization of the water dynamic over time. The permanent water surfaces (100% occurrence over 36 years) are represented in blue, and areas where water sometimes occurs are shown in pink through to purple (0% < occurrence < 100%). The paler shades are areas where the water occurs less frequently. For more detail see: 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) [https://www.nature.com/articles/nature20584]
source_title	Water Occurrence (1984-2019)
spatial	WLD