At this point, you should feel confident that you can find and modify datasets to your needs. We've covered common locations from where you can acquire data and we've touched on the different types of flags topojson offers. With these skills, it is up to you to make sure your data is trimmed and is acquired to your visualization needs. This closes the circle of developing maps with D3. In the next chapter, we will refine your craft by focusing on testing your visualizations.