When visiting Ladakh you'll encounter many Europeans navigating with large size Olizane paper maps (scale 1:150K). Olizane maps have been around for 2 decades and cover the entire Ladakh region and North Himachal. These are slightly less detailed (less terrain detail) topographic maps that mainly show popular hiking routes, passes, peaks and settlements. These are topographic maps with 100m interval contour lines. The trails shown on these maps are a bit less accurate (more schematic then exact GPS recorded) and higher scale make them less accurate then say OSM. Contour interval is also 10x less than OSM. Still the larger scale features on these maps are perfect for manual referenced navigation.