In this chapter, you have been provided with a more thorough description of some of the concepts you were introduced to in earlier chapters. Namely, you have been provided with a description of the MapView, Map, and Layers classes along with some of the concepts required to understand projections and coordinate systems, scale, map interactions, and so on. You have also been introduced to the many kinds of layers that ArcGIS Runtime supports, which included an object model diagram that shows the breadth of supported layer types. Also, you were shown how to access online content while at the same time using Behaviors, which greatly expands the ability of your apps by providing a reference to the MapView class, so you can focus on requirements, instead of architecture. Lastly, you were introduced to adding offline content to a map.

Now that you've learned about the map and layer in 2D, we'll next turn our attention to 3D, where we will find that many of the concepts we've learned here apply to 3D. We'll learn about why we would want to use 3D, how to change from 2D to 3D, navigation in 3D, 3D layers, surface models, MVVM in 3D, and 3D content.