Nepal’s most popular trekking regions at 1:50, 000 or 1:100, 000 in a series of detailed topographic maps originally prepared by the Austrian climber & cartographer Erwin Schneider which for nearly five decades provided the best & often the only coverage of these areas. Now sponsored by the German Scientific Association of Comparative High-Mountain Research (Arbeitsgemeinschaft für vergleichende Hochgebirgsforschung), the maps are still traditionally referred to as “the Schneider series”. Most maps have contours at 40-m intervals &, with bold relief shading & colouring for the glaciers, provide a vivid representation of the terrain. As the series is currently being revised to include more trekking information, please see the individual descriptions for more details.