Nakarte is a client-side single-page web mapping application built with Leaflet and Knockout, specialized for outdoor activities like hiking, cycling, and mountaineering. It provides an extensive catalog of map layers (OSM, satellite, topographic, overlays) with a strong focus on European and Russian regions. The application includes comprehensive GPS track management: loading from files (GPX, KML, GeoJSON, etc.) and online services (Strava, Garmin, OSM, Wikiloc), editing, elevation profiles, and exporting to GPX/KML/ZIP or Garmin JNX format. Additional features include search with multiple providers, panorama viewers (Mapillary, Wikimedia), azimuth/distance measurement, coordinate display in various formats, map printing with page layout, session save/restore, and custom layer configuration. The architecture is a classic Leaflet-based SPA with Knockout for UI bindings, webpack for bundling, and a separate CORS proxy server for tile access. External dependencies include Leaflet, Knockout, protobuf for track serialization, and various external API services. The codebase shows signs of organic growth with legacy code patterns (vendored scripts, relaxed ESLint for old files) and mixed English/Russian comments.