Level I of three levels. Drawing upon a variety of existing maps, data and information, WWF and the Center for Environmental Systems Research, University of Kassel, Germany created the Global Lakes and Wetlands Database (GLWD). The combination of best available sources for lakes and wetlands on a global scale (1:1 to 1:3 million resolution), and the application of GIS functionality enabled the generation of a database which focuses in three coordinated levels on (1) large lakes and reservoirs, (2) smaller water bodies, and (3) wetlands. Level I (GLWD-1) comprises shoreline polygons of the 3067 largest lakes (area ≥ 50 km2) and 654 largest reservoirs (storage capacity ≥ 0.5 km3) worldwide, and includes extensive attribute data. Level 2 (GLWD-2) comprises the shoreline polygons of permanent open water bodies with a surface area ≥ 0.1 km2 excluding the water bodies contained in GLWD-1. The approx. 250,000 polygons of GLWD-2 are attributed as lakes, reservoirs and rivers. Level 3 (GLWD-3) comprises lakes, reservoirs, rivers and different wetland types in the form of a global raster map at 30-second resolution. For GLWD-3 Polygons of GLWD-1 and GLWD-2 were combined with additional information on the maximum extents and types of wetlands. Class 'lake’ in both GLWD-2 and GLWD-3 also includes man-made reservoirs, as only the largest reservoirs have been distinguished from natural lakes.
Monday, 04 May 2015 14:44
Global Lakes and Wetlands Database
Additional Info
- Project: Mapping North American Environmental Issues
- Dataset Title: Global Lakes and Wetlands Database
- Data Series: Conservation Science Data Sets
- Orginator: World Wildlife Fund (WWF)
- Institution Type: independent
- Author: Lehner, B.,Doell, P.
- Distributor: World Wildlife Fund (WWF)
- Reports: Lehner, B., and P. Döll. 2004. Development and validation of a global database of lakes, reservoirs and wetlands. Journal of Hydrology 296/1-4: 1–22.
- Data Type: GIS
- Délı̨nę District: yes
- K’asho Got’ı̨nę District: yes
- Tulı́t’a District: yes
- Time Period: [197- - 199-]
- Source Date: 2004
- Version: Level III Version 1
- Access Constraints: open download - no login
- Use Constraints: none
- Completion Status: complete
- Maintenance: as needed
- Maintenance Frequency: unknown
- Metadata Available: yes
- Metadata Contact: Bernhard Lehner, Hydrologist, World Wildlife Fund US: This email address is being protected from spambots. You need JavaScript enabled to view it.
- Spatial Extent: North America
- Traditional Knowledge: no
- Wildlife: no
- Habitat: yes
- Keywords: wetlands; lakes; reservoirs, rivers
- Data Category: raster
- Format: grid
- Feature Type: image
- Feature Count: Unknown
- Dataset Descriptive Name: GLWD-level3
- File Name: glwd_3
- Scale: 1:3,000,000
- Projection: unknown
- Downloadable: yes
- Downloadable Format: zip
- See Also: 147, 148
- Other Digital Formats: shapefile, mxd
Phone: 867-374-4040
Email: