sftrack provides modern classes for tracking and movement data, relying on sf spatial infrastructure. Tracking data are made of tracks, i.e. series of locations with at least 2-dimensional spatial coordinates (x,y), a time index (t), and individual identification (id) of the object being monitored; movement data are made of trajectories, i.e. the line representation of the path, composed by steps (the straight-line segments connecting successive locations). sftrack is designed to handle movement of both living organisms and inanimate objects.

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Source: sftrack: Central Classes for Tracking Data • sftrack