In this chapter, we mastered the heart of any web mapping, or WebGIS application, interactions, and controls. We learned how to make brand new interactions and controls, and how to modify or customize existing ones to our needs effectively. We also learned how to implement some very useful controls for a web mapping application. We didn't see directly how we can implement the attribute controls from the previous chapter; however, you are most certainly able to do it based on the other examples.
In the next chapter, we will learn how to customize the view and how to use multiple, or even custom projections, with OpenLayers 3. We will see how deeply Proj4JS is integrated into the library and how easily we can use its capabilities almost directly from OpenLayers 3, if we include it in our project. We will also play with extents, rotation values, and animations, just to mention a few.