Regional water bodies remote sensing products with links to geotiff images

Water is a class in all available global and regional land cover maps. The spatial resolution of those existing products ranges between 300 m to 1 km. The majority of lakes within tundra environment is however much smaller than the spatial resolution of those maps. ENVISAT ASAR Wide Swath data with 150 m resolution can identify 50% more open water surface areas than land over maps based on MODIS (Bartsch et al. 2008) and allows regular (annual) updates on regional scale.