Symbol maps in Tableau - Step-by-Step Guide

Introduction

Symbol maps show data points on a map using symbols like circles or shapes. They help you see where things happen and how much or how many for each place.

When you want to show sales numbers for different cities on a map.

When you need to display the number of customers in each country.

When you want to compare store performance by location using circle sizes.

When you want to highlight specific points like offices or events on a map.

When you want to see patterns of data spread across regions visually.

Steps

Step 1: Connect to your data source

- Data pane

Your data fields appear in the Data pane on the left side

💡 Make sure your data includes location fields like city, state, or latitude and longitude

Step 2: Drag a geographic field (like City or State) to the Detail mark on the Marks card

- Marks card > Detail

Tableau creates a map view with marks placed at each location

💡 If Tableau does not recognize the field as geographic, right-click it and set geographic role

Step 3: Drag a measure (like Sales or Number of Customers) to the Size mark on the Marks card

- Marks card > Size

Symbols on the map change size based on the measure values

💡 Larger symbols mean higher values, smaller symbols mean lower values

Step 4: Drag a dimension (like Category) to the Color mark on the Marks card

- Marks card > Color

Symbols get different colors based on the categories

💡 Colors help you quickly see differences between groups

Step 5: Adjust symbol size using the Size slider on the Marks card

- Marks card > Size slider

Symbols become easier to see or less crowded on the map

💡 Make sure symbols do not overlap too much for clarity

Step 6: Add tooltips by dragging fields to Tooltip on the Marks card

- Marks card > Tooltip

When you hover over a symbol, detailed info appears

💡 Include useful details like exact sales or customer count

Before vs After

Before

Map shows all locations with same size and color symbols, no data differences visible

After

Map shows symbols sized by sales amount and colored by product category, making patterns clear

Settings Reference

Geographic Role

📍 Data pane > right-click field > Geographic Role

Tells Tableau how to interpret the field as a location on the map

Default: None

Marks Type

📍 Marks card > drop-down menu

Controls how data points appear on the map

Default: Automatic

Size

📍 Marks card > Size slider

Changes the size of symbols to represent data magnitude

Default: Medium

Color

📍 Marks card > Color

Colors symbols to show categories or highlight differences

Default: Single color

Common Mistakes

Using non-geographic fields without setting geographic role

Tableau cannot place symbols correctly on the map without geographic info

Right-click the field and assign the correct geographic role before building the map

Making symbols too large causing overlap

Overlapping symbols make the map hard to read and interpret

Use the Size slider to reduce symbol size for better clarity

Not adding tooltips for details

Users cannot see exact numbers or info when hovering over symbols

Drag relevant fields to Tooltip on the Marks card to show details on hover

Summary

Symbol maps show data points on a map with symbols sized and colored by data values.

Assign geographic roles to location fields to ensure correct map placement.

Adjust symbol size and add tooltips for clear and informative visualizations.