A journal of places you've been, with terrain in lines.
Peakline is a place journal. Pick a spot on the map, save a line drawing of its terrain, and mark when you visited or summited. Use presets for Japan's 100 Mountains and 100 Coasts, track your progress, and compare your record with satellite imagery.
Elevation data comes from the Geospatial Information Authority of Japan (GSI) within Japan, and Mapzen Terrain Tiles (AWS Open Data) elsewhere. The app collects no personal data.
© 2026 Takanori Hamuro · Elevation: GSI Japan / Mapzen Terrain Tiles (SRTM, ETOPO1)