Color used to clear canvas on each frame. Number of animation steps/frames used in the animation. If the data contains a fewer number of total frames, the lesser value will be used. Spatial resolution in pixels. A resolution of 1 means no spatial aggregation of the data. Any other resolution of N results in spatial aggregation into cells of NxN pixels. The value N must be power of 2. Animation duration in seconds. A function used to calculate a value from the aggregate data for each cell. See -torque-resolution. The table column that contains the time information used create the animation. A linear animation will discard previous values while a cumulative animation will accumulate them until it restarts.