VERIFIED SOLUTION i

How to create a bi-variate thematic map in MapInfo Pro

How to create a bi-variate thematic map in MapInfo Pro

User has a point table of 3 Warehouses and a Stores point table that contains Sales Data in a numeric format, and a field denoting which of the 3 Warehouses the store is supplied by.

Two thematic shades can be applied to this single table that will vary the size of each point based on the sales Data, while also showing the color associated with each Warehouse.  This is commonly called a “bi-variate” thematic map, as it displays styles based on 2 variables.

To do this create the Ranged thematic first and then the Individual Thematic shade.

          1. Select “Home>Add theme” and select “Ranges” For type and “Point Ranges, varying size” for the template:
User-added image

 

2. Select the Stores table and the Sales field.  The field must be numeric in data type (integer, decimal, or float) to be chosen for a ranged thematic:


User-added image
 

3. Click “Next” and then at step 3 of 3 select the “Styles” button:

User-added image
 

4. Click on one of the swatches and use the drop-down to change to a star for this example.  This will allow the legend entries to be consistent for both thematic layers:

User-added image

             5. Click OK and the thematic shows the stores (“stars”) of varying size, based on Sales.

User-added image

Now one can apply a second thematic shade to show via color style, the Warehouse associated with each Store retail location.

            6. With the Mapper active, click “Add Theme” as above but choose the Individual type and “Point IndValue Default”,                     which applies a different color style, based on a chosen field.

User-added image

 

7. Select the Stores table and the Warehouse field so that all stores with the same Warehouse entry will share a common style:

User-added image
 

8. At step 3 of 3, click on “Styles” to  change the symbol to the stars selected to show Sales for the first thematic shade:


User-added image

 

9. In the Customize Individual Styles dialog, select each Ind. Value category entry and then click on "Style" and change the symbol to a star, to match the map objects in the legend from the first thematic.

  • This is so the legend is consistent in regards to objects depicted.
     

User-added image
 

10. Repeat for each category so they have a consistent star symbol type and before clicking OK, check the “Replace Layer Style” checkbox:

User-added image

11. Click OK through the dialogs to see that a second thematic has been applied, where color denotes the Warehouse associated and the relative size denotes the Sales and the legend is consistent in regards to styles:


User-added image



 




 
UPDATED:  July 20, 2017