Explicit Encoding Overlaying

[sehilyi]

Explicit encoding is frequently overlaid with other charts (e.g., [1,2]), so we must support the overlay.

We can specify overlay type explicit encoding by separate spec types.

layout: { /* */ },
consistency: { /* */ },
overlap_reduction: { /* */ },
explicit_encoding: { /* here! */ }

Perhaps, we need to use different name (object key) for the explicit encoding to differentiate it with that in layout.

• [1]: Interaction Support for Visual Comparison Inspired by Natural Behavior
• [2]: What’s the Difference?: Evaluating Variants of Multi-Series Bar Charts for Visual Comparison Tasks

[sehilyi]

We need to plan whether we implement the separate explicit encoding (i.e., one of layout type), but the explicit encoding overlay is prior things to implement since it seems to be more effective [2].