How to Create a Treemap Diagram

A treemap is a graphical tool that allows you to visualize your data and see how your information is divided and allocated between categories. You can use treemaps to compare and contrast data, identify trends, and find relationships between data points. A treemap is a data visualization technique that uses a tree-like structure to display hierarchical data. The size of the rectangles in the diagram indicates the relative size of the data elements, while the color indicates the data element’s category. This article will show you how to create a treemap diagram. Keep reading to learn more.

Treemap Basics

When it comes to data visualization, treemaps are a great way to show relationships between hierarchical data. In a treemap, each rectangle represents a group of data, and the size of the rectangle is proportional to the amount of data in that group. Within each rectangle, smaller rectangles represent individual pieces of data.

To create a treemap chart, you need to collect data that can be represented in a hierarchical structure. This could be the contents of a file system, website, or product catalog. Determine how you want to group your data. You might want to group it by category (e.g., products by type), location (e.g., files on a computer by directory), or other criteria. Once you have determined your grouping scheme, you need to decide on the depth of the hierarchy and how many levels you want it to go.

Next, you need to create an outline of your tree based on your grouping scheme and depth level. Start with the root node at the top and add child nodes beneath it until all of your data has been accounted for. Ensure that each node has at least one child node below it, or else it will not be displayed in the diagram.

The size and shape of each rectangle will depend on how much data is associated with that node. You can use absolute values (e.g., number of files) or relative values (e .g., percentage of total files). For more accurate diagrams, use both absolute and relative values together.

Color can also be used to represent information about nodes in a treemap. You might want different colors for high-priority items versus low-priority items or different colors for different types of products.

Creating a Treemap Chart


A treemap chart is a great way to organize data. You can create a treemap in a word processing program or a data visualization program.

The following steps will show you how to create a treemap chart in Microsoft Excel.

  • Open a new Excel spreadsheet.
  • In the first column, list the data categories.
  • In the second column, list the data values for the first category.
  • In the third column, list the data values for the second category.
  • Repeat Step 3 and Step 4 for each category of data.
  • In the last column, list the total for each category.
  • Create a rectangle for each category, and then use the formula =SUM(C2:C5) to calculate the total sales for each category.
  • Draw the rectangles in the Excel spreadsheet to create the diagram.

One of the most important things when creating a treemap is to ensure that the data is accurately represented in a hierarchical diagram. The hierarchy should reflect how the data is organized in reality. Select an appropriate color scheme to indicate different hierarchal relationships or groups of data. Legends and labels are crucial in treemaps because they explain how the colors are related and identify other tree parts. This will help viewers understand your diagram at a glance.

Treemapping is an essential tool for data visualization. It can help to reveal patterns and relationships in data and can be used to compare and contrast data sets. Additionally, treemaps are relatively easy to create and can be customized to fit the user’s needs.