Geographic roles assignment in Tableau - Real Business Scenario

Scenario Mode

👤 Your Role: You are a sales analyst at a retail company.

📋 Request: Your manager wants you to create a map visualization showing sales by state in the United States. To do this, you need to assign the correct geographic roles to the location data in Tableau.

📊 Data: You have a dataset with columns: Order ID, State, Sales Amount, and Order Date. The State column contains two-letter state abbreviations.

🎯 Deliverable: Create a filled map in Tableau that shows total sales by state across the US.

Sample Data

Order ID	State	Sales Amount	Order Date
1001	CA	250	2024-01-15
1002	NY	300	2024-01-20
1003	TX	150	2024-01-22
1004	CA	400	2024-02-05
1005	FL	200	2024-02-10
1006	NY	350	2024-02-15
1007	TX	100	2024-02-20
1008	FL	300	2024-03-01

1

Step 1: Open Tableau and connect to the dataset containing Order ID, State, Sales Amount, and Order Date.

No formula needed. Just connect to the data source.

Expected Result

Dataset is loaded into Tableau with all columns visible.

2

Step 2: Assign the geographic role to the State field.

Right-click the 'State' field in the Data pane, select 'Geographic Role', then choose 'State/Province'.

Expected Result

Tableau recognizes the State field as geographic data and enables map visualizations.

3

Step 3: Create a new worksheet and drag the State field to the Detail on the Marks card.

Drag 'State' to Detail on Marks card.

Expected Result

States are recognized as geographic locations for the map.

4

Step 4: Drag the Sales Amount field to Color on the Marks card and set aggregation to SUM.

Drag 'Sales Amount' to Color on Marks card. Ensure aggregation is SUM.

Expected Result

States are colored by total sales amounts.

5

Step 5: Convert the view to a filled map.

Click on the 'Show Me' panel and select the 'Filled Map' option.

Expected Result

A filled map appears showing states colored by total sales.

6

Step 6: Add a title to the worksheet: 'Total Sales by State'.

Double-click the title area and type 'Total Sales by State'.

Expected Result

The map has a clear title describing the visualization.

Final Result

-----------------------------------
|        Total Sales by State      |
|                                 |
|  [Filled US Map with states]     |
|  CA: Darker color (650 total)   |
|  NY: Darker color (650 total)   |
|  TX: Medium color (250 total)   |
|  FL: Medium color (500 total)   |
|                                 |
|  Color Legend:                  |
|  Light to Dark = Low to High    |
-----------------------------------

✓California and New York have the highest total sales.

✓Florida and Texas have moderate sales volumes.

✓The map visually highlights sales concentration by state.

Bonus Challenge

Add a filter to the map to show sales by a selected month.

Show Hint

Use the Order Date field to create a filter for months, then apply it to the worksheet.

Practice

1. What is the main purpose of assigning a geographic role to a field in Tableau?

easy

A. To tell Tableau what type of location data it is, enabling automatic map creation

B. To change the color of the map points

C. To filter data based on dates

D. To sort data alphabetically

Solution

1. Step 1: Understand geographic roles in Tableau

   Geographic roles tell Tableau what kind of location data a field contains, like country or city.

2. Step 2: Recognize the effect of assigning roles

   Assigning the correct role allows Tableau to create maps automatically and accurately.

3. Final Answer:

   To tell Tableau what type of location data it is, enabling automatic map creation -> Option A

4. Quick Check:

   Geographic role purpose = automatic map creation [OK]

Hint: Geographic roles tell Tableau how to map your data [OK]

Common Mistakes:

• Thinking geographic roles change colors or filters
• Confusing geographic roles with data sorting
• Assigning roles to non-location data

2. Which of the following is the correct way to assign a geographic role to a field named City in Tableau?

easy

A. Double-click the field > Change Data Type > City

B. Right-click the field > Geographic Role > City

C. Drag the field to Filters shelf > Select City

D. Right-click the field > Sort > City

Solution

1. Step 1: Locate the field in Tableau's Data pane

   Find the field named City in the data pane.

2. Step 2: Assign geographic role via right-click menu

   Right-click the field, choose Geographic Role, then select City to assign the correct role.

3. Final Answer:

   Right-click the field > Geographic Role > City -> Option B

4. Quick Check:

   Assign role by right-click > Geographic Role [OK]

Hint: Right-click field > Geographic Role > choose correct location type [OK]

Common Mistakes:

• Using Change Data Type instead of Geographic Role
• Dragging field to Filters to assign role
• Sorting field instead of assigning geographic role

3. Given a dataset with a field PostalCode assigned the geographic role 'Postal Code', what will Tableau do when you drag this field to the Rows shelf and add a map visualization?

medium

A. Tableau will treat postal codes as text and not create a map

B. Tableau will show a bar chart of postal codes

C. Tableau will return an error because postal codes are not supported

D. Tableau will plot points on the map based on postal code locations

Solution

1. Step 1: Understand the effect of assigning 'Postal Code' geographic role

   Assigning 'Postal Code' role tells Tableau to interpret the field as location data for mapping.

2. Step 2: Dragging the field to Rows with map visualization

   Tableau uses the postal codes to plot geographic points on the map automatically.

3. Final Answer:

   Tableau will plot points on the map based on postal code locations -> Option D

4. Quick Check:

   Postal Code role = map points plotted [OK]

Hint: Postal Code role enables map plotting by location [OK]

Common Mistakes:

• Expecting a bar chart instead of a map
• Thinking postal codes cause errors
• Assuming postal codes are treated as text

4. You assigned the geographic role 'State' to a field named Region, but Tableau does not display the map correctly. What is the most likely cause?

medium

A. The Region field contains values that are not valid state names

B. You need to assign the role 'City' instead of 'State'

C. Tableau does not support mapping states

D. You forgot to refresh the data source

Solution

1. Step 1: Check the data values in the Region field

   Invalid or misspelled state names cause Tableau to fail mapping correctly.

2. Step 2: Understand Tableau's mapping requirements

   Tableau requires valid geographic names matching the assigned role to plot locations properly.

3. Final Answer:

   The Region field contains values that are not valid state names -> Option A

4. Quick Check:

   Invalid state names cause mapping errors [OK]

Hint: Check data values match assigned geographic role [OK]

Common Mistakes:

• Changing role without checking data correctness
• Assuming Tableau lacks support for states
• Ignoring data refresh when problem is data quality

5. You have a dataset with separate fields for Latitude and Longitude but Tableau is not plotting the map correctly. Which sequence of steps correctly assigns geographic roles to fix this?

hard

A. Drag Latitude and Longitude to Filters shelf

B. Right-click Latitude > Geographic Role > Longitude; Right-click Longitude > Geographic Role > Latitude

C. Right-click Latitude > Geographic Role > Latitude; Right-click Longitude > Geographic Role > Longitude

D. Convert both fields to string data type

Solution

1. Step 1: Assign correct geographic roles to each coordinate field

   Assign 'Latitude' role to the Latitude field and 'Longitude' role to the Longitude field to inform Tableau of their meaning.

2. Step 2: Verify map plotting after role assignment

   With correct roles, Tableau can plot points accurately on the map using these coordinates.

3. Final Answer:

   Right-click Latitude > Geographic Role > Latitude; Right-click Longitude > Geographic Role > Longitude -> Option C

4. Quick Check:

   Correct role assignment for coordinates = accurate map [OK]

Hint: Assign Latitude and Longitude roles to matching fields [OK]

Common Mistakes:

• Swapping latitude and longitude roles
• Dragging coordinate fields to Filters instead of assigning roles
• Changing data type to string instead of geographic role