The chapter was related to the maps, geolocation, and augmented reality features in the Windows Phone 8 applications and games. At the beginning, you learned how to use the Map control to present locations of other players in the vicinity, as well as the indicator of your current position. To make this task easier, you used the Windows Phone Toolkit, which provides you with controls representing the Pushpin element and the indicator of the user position. You also got to know how to read the current GPS coordinates and detect their changes. It is important that you can create this solution using the MVVM design pattern, data templates, and data binding mechanisms, presented earlier in the book.

The next part of the chapter presented the topic of augmented reality. You learned how to create the application which shows indicators in the image received from the camera. To simplify the task, you used the GART library. You also handled some errors which could occur while launching the augmented reality feature, by showing additional message to the user. At the end, you got to know how to launch navigation to other players easily, both on the Map and World screens.

Currently, on these screens you can see only test data, but in the next chapter you will create, deploy, and consume the web service which can provide the game with real data! Thus, let's test the newly added features and proceed to the next part of the book to learn how to allow the game to share various data between players over the Internet!