Marks
Marks are the the basic geometries, or graphical elements, in a plot that depict our data items or their linkages.
- Points
- Lines
- Area
- Volume
- Containment
- Connection
Channels
Channels are the attributes of that control how the marks appear. Channels are used to encode (or indicate) the values or meaning of our data.
Identity Channels: Categorical Attributes
- Spatial Region
- Color Hue
- Motion
- Shape
Magnitude Channels: Ordered Attributes
- Position on common scale
- Position on unaligned scale
- Length (1D size)
- Tilt/angle
- Area (2D size)
- Depth (3D position)
- Color luminance
- Color saturation
- Curvature
- Volume (3D size)
Source: Tamara Munzner, Visualization Analysis and Design
Do you think there should be more things on this page? Bring it up in class!