Creating Symbol Maps in Tableau

1. Introduction to Symbol Maps

A Symbol Map in Tableau is a geographical visualization that displays data using symbols or marks positioned at specific locations on a map. These symbols help users understand geographical patterns, compare locations, and analyze business performance across cities, states, countries, or other geographic areas.

Symbol maps are commonly used to display sales performance, customer locations, store distribution, delivery points, profit by city, and other location-based information. Symbols can be customized using size, color, shape, labels, and tooltips to communicate different aspects of the data.

For example, a company can create a symbol map of India where each city is represented by a circle. Larger circles can indicate higher sales, while smaller circles indicate lower sales.

Learning Objectives

• Understand the meaning and purpose of symbol maps.
• Learn the difference between symbol maps and filled maps.
• Understand the role of geographic fields and coordinates.
• Create symbol maps using geographic dimensions.
• Customize symbols using size, color, shape, and labels.
• Display additional information through tooltips.
• Apply symbol maps to real-world business scenarios.
• Identify and troubleshoot common symbol map problems.

2. What Is a Symbol Map?

A symbol map is a map visualization in which individual locations are represented by visual marks, such as circles or other symbols. Each mark represents a location or a group of records, depending on the level of detail in the visualization.

In Tableau, symbol maps are generally created using geographic fields such as Country, State, City, or geographic coordinates. Measures can be placed on the Marks card to control the appearance of symbols.

Example

When City is used to create a map, Tableau can display a mark for each recognized city. Sales can be placed on Size to show sales magnitude, and Profit can be placed on Color or Tooltip to provide additional information.

Key Characteristics of Symbol Maps

• Symbols represent geographic locations or aggregated location-level records.
• Symbol size can represent a quantitative measure.
• Symbol color can represent a measure or category.
• Labels can display location names or selected values.
• Tooltips provide details when users hover over a mark.
• Maps support interactive exploration of geographical patterns.

3. Why Are Symbol Maps Used?

Symbol maps make geographical information easier to understand by combining location and business data in a single visualization.

• Sales analysis: Identify cities or regions with high sales.
• Customer analysis: Display customer locations and customer concentration.
• Store analysis: Compare store performance across different areas.
• Delivery analysis: Visualize delivery destinations and distribution points.
• Profit analysis: Identify locations generating high or low profit.
• Marketing analysis: Compare campaign performance by location.
• Operational analysis: Monitor facilities, service centers, or business locations.

Example Business Scenario

A retail company wants to understand which cities generate the highest revenue. A symbol map can represent each city with a circle whose size reflects sales. Managers can quickly identify high-performing cities and investigate areas with lower sales.

4. Types of Symbol Maps

4.1 Basic Symbol Map

A basic symbol map displays marks at geographic locations. The marks may all have the same size and color, making it useful for showing where locations are distributed.

Example: Displaying all company branches across India.

4.2 Proportional Symbol Map

A proportional symbol map uses symbol size to represent a quantitative value. Larger symbols indicate larger values, while smaller symbols indicate smaller values.

Example: Displaying sales by city, with larger circles representing higher sales.

4.3 Color-Coded Symbol Map

A color-coded symbol map uses color to represent a measure or category. For example, cities with high profit may use one color, while cities with low profit use another.

4.4 Symbol Map Using Size and Color

A symbol map can encode two measures at once. Size may represent Sales, while Color represents Profit. This helps users compare two aspects of performance geographically.

However, avoid using too many visual encodings at once because the map can become difficult to interpret.

5. Symbol Maps vs. Filled Maps

Symbol maps and filled maps both represent geographic data, but they communicate information differently.

Important: A symbol map is not the same as a filled map. Use symbols for point locations and use filled areas when the boundaries of geographic regions are important to the analysis.

6. Requirements for Creating a Symbol Map

Before creating a symbol map, ensure that your dataset contains appropriate geographic information and any measures or dimensions you want to analyze.

Required or Useful Fields

Tableau can generate coordinates for supported geographic names. If your dataset contains its own latitude and longitude fields, you can use those coordinates to position marks directly.

7. Understanding the Marks Card

The Marks card controls the appearance and level of detail of marks in a Tableau visualization. When creating a symbol map, the Marks card is used to configure how the symbols look and what information they communicate.

These options allow you to transform a basic map into an informative business visualization.

8. Step-by-Step: Creating a Basic Symbol Map

Follow these steps to create a basic symbol map in Tableau Desktop.

1. Open Tableau Desktop.
2. Connect to a dataset containing geographic fields such as City, State, or Country.
3. Open a new worksheet.
4. Check whether the geographic field has the correct geographic role.
5. Double-click the geographic field, such as City, or drag it into the view.
6. Tableau creates a map for recognized geographic locations.
7. If necessary, select a symbol-based mark type such as Circle from the Marks card.
8. Drag a location identifier or another dimension to Detail when you need separate marks for individual records.
9. Adjust the map zoom and layout to make locations easier to inspect.
10. Review the marks and confirm that the displayed locations match your data.

Example

Connect to Data
       ↓
Open a Worksheet
       ↓
Add City to the View
       ↓
Tableau Creates a Map
       ↓
Select Circle on the Marks Card
       ↓
Review the Symbol Map

The exact shelves and generated fields may vary depending on whether you use geographic names, supplied coordinates, or a spatial data source.

9. Step-by-Step: Creating a Sales Symbol Map

This example creates a symbol map in which the size of each city's symbol represents sales.

Sample Dataset

Country,State,City,Sales,Profit
India,Maharashtra,Mumbai,150000,30000
India,Maharashtra,Pune,95000,18000
India,Delhi,Delhi,125000,25000
India,Karnataka,Bengaluru,110000,22000
India,Gujarat,Ahmedabad,85000,15000

Procedure

1. Connect Tableau to the dataset.
2. Verify that City, State, and Country have appropriate geographic roles.
3. Open a worksheet and add City to the view.
4. Choose Circle from the Marks type menu if necessary.
5. Drag Sales to Size on the Marks card.
6. Optionally drag Profit to Color.
7. Drag City, Sales, and Profit to Tooltip as needed.
8. Adjust the size range so differences between cities are visible.
9. Check for unknown locations and overlapping symbols.
10. Save the worksheet with a meaningful name, such as Sales by City.

Expected Result

The map displays city-level symbols. Larger circles represent higher sales, while smaller circles represent lower sales. If Profit is placed on Color, the symbol colors also communicate profitability.

10. Creating a Proportional Symbol Map

A proportional symbol map is a type of symbol map in which the size of a symbol encodes a quantitative measure. It is useful for comparing values across individual locations.

Procedure

1. Create a geographic map using recognized location fields or latitude and longitude coordinates.
2. Add a dimension or identifier to Detail to establish the desired level of detail.
3. Choose a symbol mark type, such as Circle.
4. Drag a quantitative measure, such as Sales, Revenue, or Population, to Size.
5. Adjust the size range to improve readability.
6. Optionally drag a second measure to Color.
7. Inspect the legend to understand how values are encoded.

Tableau's proportional symbol map documentation recommends using quantitative values and location names or coordinates. Data with a useful range of values generally produces more informative differences in symbol size.

For more information, see Tableau: Create Maps that Show Quantitative Values.

11. Customizing Symbol Size

Symbol size helps viewers compare the relative magnitude of values across locations. For example, a map can use larger circles for cities with higher sales and smaller circles for cities with lower sales.

How to Customize Size

1. Drag the desired measure to Size on the Marks card.
2. Click Size on the Marks card.
3. Adjust the size slider to control the minimum and maximum visual sizes.
4. Check the map to ensure that small values remain visible.
5. Review the size legend if it is displayed.

Important Considerations

• Use a size range that makes meaningful differences visible.
• Avoid symbols so large that they obscure nearby locations.
• Do not assume the visible area of a circle equals the underlying value unless the encoding is specifically designed and interpreted that way.
• Use the size legend to explain what symbol size represents.
• For values with extreme differences, consider whether a transformation or alternative visualization is more appropriate.

12. Customizing Symbol Colors

Color adds another layer of information to a symbol map. It can represent a quantitative measure, a category, or a business status.

Examples of Color Encoding

• Profit: distinguish lower-profit and higher-profit locations.
• Region: assign colors to different business regions.
• Store Type: distinguish retail stores, warehouses, and service centers.
• Performance Category: compare locations grouped into business-defined categories.

How to Apply Color

1. Drag the desired field to Color on the Marks card.
2. If the field is a dimension, Tableau typically assigns colors to its categories.
3. If the field is a measure, Tableau typically uses a quantitative color scale.
4. Open the color legend or Color menu to adjust the palette and formatting.
5. Use clear colors with sufficient contrast.

Use sequential color palettes for ordered quantitative values when appropriate, and categorical palettes for distinct groups. Ensure that color choices are understandable and do not rely on color alone to communicate important information.

13. Adding Labels to Symbol Maps

Labels display text directly on or near symbols. They can make a map easier to understand when the number of marks is manageable.

How to Add Labels

1. Drag a field such as City to Label on the Marks card.
2. Open Label to adjust text formatting and label visibility.
3. Add Sales or another value if the map needs numerical labels.
4. Check for overlapping labels and remove unnecessary fields.

Example

City: Mumbai
Sales: 150000
Profit: 30000

Labels are useful for maps with a limited number of locations. For maps containing many marks, showing every label can cause clutter. In such cases, use tooltips instead.

14. Using Tooltips in Symbol Maps

A tooltip is a small information panel that appears when a user hovers over a mark. Tooltips provide additional details without requiring every value to be displayed permanently on the map.

Information You Can Include

• City or location name.
• Total sales or revenue.
• Total profit or profit margin.
• Number of customers or orders.
• Region or store category.
• Additional business metrics relevant to the analysis.

How to Configure Tooltips

1. Drag the required fields to Tooltip on the Marks card.
2. Click Tooltip to edit its content.
3. Arrange the fields in a clear and meaningful order.
4. Use concise labels and appropriate number formatting.
5. Test the tooltip by hovering over several symbols.

A well-designed tooltip helps users explore detailed information while keeping the map visually clean.

15. Understanding Detail and Level of Detail

The Detail option on the Marks card determines how dimensions contribute to the marks in a view. It is especially important when creating symbol maps from datasets containing multiple records for the same geographic location.

Example

Suppose a dataset contains many sales transactions for Mumbai. If City is the only dimension defining the marks, Tableau may aggregate the transactions into a single city-level mark. If you add Store ID to Detail, Tableau can display separate marks for individual stores, assuming the geographic fields and data relationships support that level of detail.

When to Use Detail

• When individual stores need separate symbols.
• When individual customers or facilities must be shown.
• When multiple records share the same city or coordinates.
• When the map displays fewer marks than expected.

Always choose a level of detail that matches the question being answered. More marks do not necessarily mean a better visualization.

16. Handling Overlapping Symbols

Overlapping symbols occur when marks are located close together or when multiple records share the same coordinates. Overlap can make it difficult to identify individual locations and compare values.

Common Solutions

• Reduce the maximum symbol size.
• Adjust mark opacity so overlapping marks remain partly visible.
• Filter the data to focus on a smaller region or period.
• Zoom into a crowded area.
• Use tooltips instead of displaying every label.
• Review whether the level of detail is appropriate.
• Consider a density map when the main goal is to understand concentration rather than compare individual values.

Do not use a symbol map to communicate precise point-level comparisons if most symbols are hidden behind one another.

17. Geographic Roles and Coordinates

Symbol maps depend on accurate location information. Tableau can use supported geographic names, such as City or State, or coordinates provided directly by the dataset.

Geographic Names

When a geographic field has the correct geographic role, Tableau attempts to match the location name to its geographic information. For example, a recognized City field can be used to generate a map.

Latitude and Longitude

Latitude and longitude are useful when locations need to be positioned precisely or are not recognized by name. Latitude represents the north-south position, while longitude represents the east-west position.

Location,Latitude,Longitude,Sales
Mumbai,19.0760,72.8777,150000
Delhi,28.6139,77.2090,125000
Bengaluru,12.9716,77.5946,110000

When using coordinate fields, verify that they contain valid decimal values, are assigned the appropriate geographic roles, and use the correct coordinate order.

18. Symbol Maps in Business Dashboards

Symbol maps can be added to Tableau dashboards alongside charts, tables, filters, and key performance indicators. This allows users to compare geographic patterns with other business metrics.

Example Dashboard Components

• Sales symbol map by city.
• Bar chart comparing sales by region.
• KPI showing total revenue.
• Profit trend chart by month.
• Filters for date, region, product category, or store type.

Dashboard Interactivity

Users can select a location on the map to explore related records in other views. Filters and dashboard actions can help users investigate regional performance and compare cities or stores.

Best Practices

• Give the map a clear title.
• Explain what symbol size and color represent.
• Use meaningful filters.
• Keep tooltips concise.
• Avoid excessive labels and decorative symbols.
• Make sure the map supports the dashboard's business question.

19. Common Symbol Map Problems and Solutions

20. Practical Project: City-Wise Sales Symbol Map

Project Objective: Create a Tableau symbol map that compares sales performance across Indian cities.

Dataset Fields

• Country
• State
• City
• Sales
• Profit
• Store ID
• Order Date

Project Steps

1. Import the dataset into Tableau.
2. Verify the data types and geographic roles.
3. Create a worksheet called City-Wise Sales Map.
4. Add City to the view and confirm that Tableau recognizes the locations.
5. Select Circle as the mark type if necessary.
6. Drag Sales to Size.
7. Drag Profit to Color.
8. Drag Store ID to Detail if the goal is to show individual stores rather than aggregated city totals.
9. Add City, Sales, and Profit to Tooltip.
10. Use filters for State and Order Date if the analysis requires them.
11. Check the map for unknown locations, overlapping symbols, and confusing labels.
12. Add the map to a dashboard with a sales KPI and a regional comparison chart.

Questions to Answer

• Which cities have the highest total sales?
• Which cities generate the highest profit?
• Are there cities with high sales but relatively low profit?
• Which states contain the strongest-performing cities?
• How does the sales pattern change when a date filter is applied?

Expected Learning Outcome

By completing this project, you will learn to create symbol maps, encode measures using size and color, configure tooltips, control geographic detail, and use map-based insights to support business decisions.

21. Interview Questions and Answers

Q1. What is a symbol map in Tableau?

A symbol map displays geographic locations using symbols or marks positioned on a map.

Q2. What is the main purpose of a symbol map?

It helps users analyze geographical distributions and compare values across individual locations.

Q3. What is a proportional symbol map?

It is a symbol map in which symbol size represents the magnitude of a quantitative measure.

Q4. How do you create a basic symbol map?

Add a recognized geographic field to a worksheet and use a symbol-based mark type, such as Circle, to display locations.

Q5. How can you display sales values through symbol size?

Drag the Sales measure to Size on the Marks card.

Q6. How can you color symbols according to profit?

Drag Profit to Color on the Marks card and choose an appropriate color palette.

Q7. What is the purpose of the Detail option?

Detail adds dimensions that determine the level of detail and can help create separate marks for individual entities.

Q8. What is the difference between a symbol map and a filled map?

A symbol map uses marks at locations, while a filled map colors geographic areas such as states or countries.

Q9. Why might Tableau display only one symbol?

The data may be aggregated, or the view may not contain enough detail to separate the locations or records.

Q10. How can you reduce overlapping symbols?

Reduce symbol size, adjust opacity, zoom in, filter the data, or use a different map type when appropriate.

Q11. What is the purpose of tooltips?

Tooltips display additional details when users hover over a symbol.

Q12. Can symbol maps display more than one measure?

Yes. For example, size can represent Sales and color can represent Profit.

Q13. When should a density map be considered instead?

A density map is useful when the primary question concerns the concentration of many overlapping geographic points.

Q14. Why are geographic roles important?

They help Tableau interpret supported location names and create map views.

Q15. What makes a symbol map effective?

A clear business question, accurate locations, meaningful size and color encodings, readable tooltips, and limited visual clutter make a symbol map effective.

22. Quick Revision Checklist

• Understand the definition of a symbol map.
• Know the difference between basic and proportional symbol maps.
• Prepare geographic fields and quantitative measures.
• Verify geographic roles and coordinates.
• Create a map using a recognized location field.
• Use Circle or another suitable symbol mark type.
• Place measures on Size and Color.
• Use Detail to control the level of detail.
• Add helpful labels and tooltips.
• Resolve unknown locations and overlapping marks.
• Use symbol maps appropriately in dashboards.
• Explain the meaning of size and color clearly.

23. Conclusion

Creating Symbol Maps in Tableau is an effective way to visualize geographic distributions and compare quantitative values across locations. By using geographic fields, appropriate mark types, size, color, labels, and tooltips, users can build informative maps for sales analysis, customer distribution, store performance, and other business scenarios. Accurate location data, appropriate levels of detail, and clear visual encoding are essential for producing reliable and easy-to-understand symbol maps.

24. Additional Learning Resources

• Tableau Official Guide: Create Maps That Show Quantitative Values
• Tableau Official Guide: Mapping Concepts
• Tableau Official Guide: Build Maps in Tableau
• JustAcademy Tableau Training
• Register for a Tableau Course Demo