names = { 'aster3': 'ASTER', 'aw3d30_england': 'AW3D30', 'merit_dem': 'MERIT', 'os_terrain_50': 'OST50', 'srtm30': 'SRTM', 'tandemx': 'TanDEM-X' } river_names = {'Sheepmount': 'Eden', 'GreatCorby': 'Eden', 'Greenholme': 'Irthing', 'TempleSowerby': 'Eden'}