A TreeMap Relational Model transform produces a data structure that can be used by a TreeMap Visualization. The important concept behind a TreeMap Relational Model is that it builds up a hierarchical dataset based off of node information. This differs from a Flow Relational Model, which builds its model from link information.
TreeMap Visualizations will display the hierarchical data structure shown above as a set of nested rectangles (TreeMap), or concentric circles (Sunburst). Each branch is represented by a rectangle (TreeMap), or section of the circle (Sunburst). Sub-branches and leaf nodes are shown as smaller rectangles tiled inside of their parent (TreeMap), or as outward radial extensions (Sunburst).
The “Choose a Transform” dialog will appear, showing the available transforms in the system. Select the “TreeMap Relational Model” option. This will launch the TreeMap Relational Model Wizard:
References National Park Summary.csv
This step defines the relationship between attributes within the dataset that will appear in the final Visualization. In the Example below, the attributes will be show using the following hierarchy: Political Party > President > Park Name.
For each level you must supply at least one aggregated value definition for the Tree Map visualization to use on determining the size of each piece. You can define more than one, which is useful when using color rules for the pieces.
The Aggregated Values panel updates as you select the Tree Map Levels on the left. That is, the right side is context sensitive to the level and you can define different aggregated values for each tree map level.
Details about this step can found here: Satisfy Upstream Node Variables Wizard Step
Refer to Variables section for more information.