Before you try to create a thematic map you need to be sure that the 2 data sets can be mapped together. This requires the data to be in exactly the format if the data is not contained in the same data. The simplest way to check is to open up the 2 data sets in individual browsers and compare them side by side to be sure that they are the same, and if not modify the data / file structure as appropriate. Obviously whenever you are modifying data you need to be careful to copy and / or back up your data to retain integrity.
Once you have your data in the right format MapInfo makes creating a thematic map very simple:
1. Select 'Map' and then 'Create Thematic Map'. The dialogue boxes that appear then will lead you simply through the process.
2. In the 'Create Thematic Map - Step 1 of 3' dialogue box you can choose the type of map that you would like to create from the buttons on the left and then the type of data from the descriptions in the main body of the box under 'Template Name'. The preview box on the right will now show the legend of the theme. Click 'Next' when you are happy.
3. The next dialogue box 'Create Thematic Map - Step 2 of 3' will now ask you to select the data which you would like to map. If will vary depending on the type of thematic map that you are trying to create. Click 'Next' when you are happy. I will be posting a more detailed post about this part of MapInfo in future.
4. The final dialogue box ' Create Thematic Map - Step 3 of 3' allows you to edit and further refine your theme, and so again, obviously varies depending on the theme that you have chosen. When you are happy click 'OK' and your map will be complete. Again i will be posting a more detailed post about this part of MapInfo in future.
There you have it. A beginners guide to creating a simple thematic map in MapInfo.
Click here for further details of Acuity Training's introductory MapInfo training course.