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.

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.

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.

The map shows the number of species at risk per ecoregion. Species at risk include native mammals, birds, fish, reptiles, amphibians, plants and molluscs that have been assessed as being at risk of extinction at a national level. The map was originally published online in the Atlas of Canada, 6th Edition as an interactive digital map derived from a shapefile and mapped online using MapServer, a platform for publishing spatial data to the web. In order to preserve the geographical content of this Edition during its publication from 1999 to 2009 all the maps have been converted from their online interactive form to a raster and made available in PDF and JPEG.

These maps present the major environmental and social features of land use for most of northern Canada between the latitudes of 60 and 77 degrees north. They include themes such as ecological overview, wildlife, hunting and trapping, fish resources, recreation and tourism, archaeological sites, sea-ice conditions, coastal classification, etc. At the time of their creation they were seen as an extension of the CLI mapping program. They were published by Agriculture Canada, Environment Canada, and Indian and Northern Affairs Canada between 1972 and 1986 and have a scale of 1:250,000. "These maps must be regarded as interim since the information is incomplete or based on preliminary or reconnaissance surveys for some areas, and since current research and survey programs are generating new information."

These maps present the major environmental and social features of land use for most of northern Canada between the latitudes of 60 and 77 degrees north. They include themes such as ecological overview, wildlife, hunting and trapping, fish resources, recreation and tourism, archaeological sites, sea-ice conditions, coastal classification, etc. At the time of their creation they were seen as an extension of the CLI mapping program. They were published by Agriculture Canada, Environment Canada, and Indian and Northern Affairs Canada between 1972 and 1986 and have a scale of 1:250,000. "These maps must be regarded as interim since the information is incomplete or based on preliminary or reconnaissance surveys for some areas, and since current research and survey programs are generating new information."

These maps present the major environmental and social features of land use for most of northern Canada between the latitudes of 60 and 77 degrees north. They include themes such as ecological overview, wildlife, hunting and trapping, fish resources, recreation and tourism, archaeological sites, sea-ice conditions, coastal classification, etc. At the time of their creation they were seen as an extension of the CLI mapping program. They were published by Agriculture Canada, Environment Canada, and Indian and Northern Affairs Canada between 1972 and 1986 and have a scale of 1:250,000. "These maps must be regarded as interim since the information is incomplete or based on preliminary or reconnaissance surveys for some areas, and since current research and survey programs are generating new information."

These maps present the major environmental and social features of land use for most of northern Canada between the latitudes of 60 and 77 degrees north. They include themes such as ecological overview, wildlife, hunting and trapping, fish resources, recreation and tourism, archaeological sites, sea-ice conditions, coastal classification, etc. At the time of their creation they were seen as an extension of the CLI mapping program. They were published by Agriculture Canada, Environment Canada, and Indian and Northern Affairs Canada between 1972 and 1986 and have a scale of 1:250,000. "These maps must be regarded as interim since the information is incomplete or based on preliminary or reconnaissance surveys for some areas, and since current research and survey programs are generating new information."

These maps present the major environmental and social features of land use for most of northern Canada between the latitudes of 60 and 77 degrees north. They include themes such as ecological overview, wildlife, hunting and trapping, fish resources, recreation and tourism, archaeological sites, sea-ice conditions, coastal classification, etc. At the time of their creation they were seen as an extension of the CLI mapping program. They were published by Agriculture Canada, Environment Canada, and Indian and Northern Affairs Canada between 1972 and 1986 and have a scale of 1:250,000. "These maps must be regarded as interim since the information is incomplete or based on preliminary or reconnaissance surveys for some areas, and since current research and survey programs are generating new information."

These maps present the major environmental and social features of land use for most of northern Canada between the latitudes of 60 and 77 degrees north. They include themes such as ecological overview, wildlife, hunting and trapping, fish resources, recreation and tourism, archaeological sites, sea-ice conditions, coastal classification, etc. At the time of their creation they were seen as an extension of the CLI mapping program. They were published by Agriculture Canada, Environment Canada, and Indian and Northern Affairs Canada between 1972 and 1986 and have a scale of 1:250,000. "These maps must be regarded as interim since the information is incomplete or based on preliminary or reconnaissance surveys for some areas, and since current research and survey programs are generating new information."