Ключевые слова: abstract, alone, background, boots, cold, direction, foot, footprint, footprints, footwear, forward, freeze, frost, gait, go, human, ice, imprint, itinerary, leave, man, motion, movement, nature, one, outdoor, pass, person, proceed, road, season, shoes, single, snow, sole, step, stride, texture, trace, track, trajectory, trample, travel, tread, walk, way, weather, white, winter,