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مسودة

The Global Lakes and Wetlands Database (GLWD)

The Global Lakes and Wetlands Database (GLWD) version 2 provides a comprehensive and seamless global map of inland surface waters distinguished into 33 waterbody and wetland types. GLWD v2 was developed by harmonizing the best available ground- and satellite-based data sources and has been designed to represent the maximum non-overlapping extents of aquatic ecosystems over the broad contemporary period of 1990-2020.

GLWD v2 represents a total of 18.2 million km2 of wetlands at a grid cell resolution of 15 arc-seconds (approximately 500 m at the equator). The data consist of a map of the dominant waterbody or wetland type in each grid cell, as well as 33 individual class layers which represent the sub-cell fraction of each specific class within each grid cell.

Version 2 of GLWD (Lehner et al., 2025) is the successor of the widely-used GLWD version 1 (Lehner & Döll, 2004). The quality, resolution, and format of GLWD v2 significantly improves upon GLWD v1 and supersedes the older version.

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Cite this as

DOI:
10.5194/essd-17-2277-2025
قيد الانتظار
Lehner, B., Anand, M., Fluet-Chouinard, E., Tan, F., Aires, F., Allen, G.H., Bousquet, P., Canadell, J.G., Davidson, N., Ding, M., Finlayson, C.M., Gumbricht, T., Hilarides, L., Hugelius, G., Jackson, R.B., Korver, M.C., Liu, L., McIntyre, P.B., Matthews, E., Nagy, S., Olefeldt, D., Pavelsky, T.M., Pekel, J.-F., Poulter, B., Prigent, C., Wang, J., Worthington, T.A., Yamazaki, D., Zhang, X., Thieme, M. (2025). Mapping the world’s inland surface waters: an upgrade to the Global Lakes and Wetlands Database (GLWD v2). Earth System Science Data 17, 2277–2329. https://doi.org/10.5194/essd-17-2277-2025
DOI Status: This DOI is not yet resolvable. It will be published when the dataset is made public or updated.

Metadata
INSPIRE
DCAT-AP
تنزيل

Basic information
DOI https://doi.org/10.5194/essd-17-2277-2025
Resource type Spatial data set
Date of creation 2025-07-28
Date of last revision 2025-07-28
Show changelog
Metadata identifier The-Global-Lakes-and-Wetlands-Database-(GLWD)
Metadata language English
Themes (DCAT-AP)
High-value dataset category
ISO 19115 topic category environment
Other identifier
Keyword URIs
Spatial information
INSPIRE identifier
INSPIRE Themes
Geographic identifier
Coordinate Reference System
Spatial representation Type
Bounding Box
Spatial resolution of the dataset (m)
Provenance
Lineage statement
Metadata Standard
Conformity
Source dataset
Update frequency
Sources
Purpose
Process steps
Temporal extent (Start)
Temporal extent (End)
Version notes

The Global Lakes and Wetlands Database (GLWD) version 2 provides a comprehensive and seamless global map of inland surface waters distinguished into 33 waterbody and wetland types. GLWD v2 was developed by harmonizing the best available ground- and satellite-based data sources and has been designed to represent the maximum non-overlapping extents of aquatic ecosystems over the broad contemporary period of 1990-2020.

GLWD v2 represents a total of 18.2 million km2 of wetlands at a grid cell resolution of 15 arc-seconds (approximately 500 m at the equator). The data consist of a map of the dominant waterbody or wetland type in each grid cell, as well as 33 individual class layers which represent the sub-cell fraction of each specific class within each grid cell.

Version 2 of GLWD (Lehner et al., 2025) is the successor of the widely-used GLWD version 1 (Lehner & Döll, 2004). The quality, resolution, and format of GLWD v2 significantly improves upon GLWD v1 and supersedes the older version.
Version 2.0
Dataset validity
Responsible party
Name of the dataset creator (Legacy) IHP-WINS
Name of the dataset maintainer IHP-WINS
Identifier of the dataset creator (Legacy)
Email of the dataset creator (Legacy) ihp-wins@unesco.org
Identifier of the dataset maintainer
Email of the dataset maintainer ihp-wins@unesco.org
Website of the dataset maintainer