Name: Lakes and Reservoir Area

Display Field: ECOREGION

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Percent of each freshwater ecoregion’s area covered with lakes and man-made reservoirs. We calculated the percentage of the ecoregion that is covered by lakes and reservoirs using lake and reservoir polygons from the Global Lakes and Wetlands Database (GLWD) (Lehner and Döll 2004). This database represents the best available source for lakes and wetlands on a global scale (1:1 to 1:3 million resolution). The GLWD contains shoreline polygons of the 3,067 largest lakes (surface area greater than or equal to 50 km2) and 654 largest reservoirs (storage capacity greater than or equal to 0.5 km3) worldwide, as well as shoreline polygons of approximately 250,000 smaller lakes, reservoirs, and rivers (surface area greater than or equal to 0.1 km2). For our calculations, only lake and reservoir polygons were used. It was not possible to separate natural lake polygons from reservoirs. These data were derived by The Nature Conservancy, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas. Data derived from: Lehner, B., and P. Döll. 2004. Development and validation of a global database of lakes, reservoirs and wetlands. Journal of Hydrology 296: 1–22. These data were derived by The Nature Conservancy, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas. This dataset was uploaded to Data Basin and is available with additional information at: http://app.databasin.org/app/pages/datasetPage.jsp?id=0e9ebd8649344857802841169232694b

Copyright Text: See the description field for credits.

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Supported Query Formats: JSON, geoJSON

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Spatial Reference: 102100  (3857)

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HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• FID ( type: esriFieldTypeOID, alias: FID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• ECO_ID ( type: esriFieldTypeDouble, alias: ECO_ID )
• ECOREGION ( type: esriFieldTypeString, alias: ECOREGION, length: 128 )
• MHT_TXT ( type: esriFieldTypeString, alias: MHT_TXT, length: 75 )
• MHT_NO ( type: esriFieldTypeSmallInteger, alias: MHT_NO )
• lake_area ( type: esriFieldTypeDouble, alias: lake_area )
• lake_aream ( type: esriFieldTypeString, alias: lake_aream, length: 25 )
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Supported Operations:   Query   Generate Renderer   Return Updates

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