![]() Cache size is approximately 20MB, which is about the same size as 6 photographs. When you use your device’s GPS while walking, Android’s Activity Recognition API will recognize that you are a pedestrian, and if you are in one of the 3850+ cities, tiles with 3D models will be downloaded and cached on the phone for that city. Google Play services 3D mapping aided corrections currently supports pedestrian use-cases only. The 3D mapping aided corrections module, in Google Play services, includes tiles of 3D building models that Google has for more than 3850 cities around the world. With a system API that provides feedback to the Qualcomm® Snapdragon™ 5G Mobile Platform that powers Pixel, the accuracy in cities (or “urban canyons”) improves spectacularly. ![]() The December Pixel Feature Drop adds 3D mapping aided GPS corrections to Pixel 5 and Pixel 4a (5G). Our solution uses 3D mapping aided corrections, and is only feasible to be done at scale by Google because it comprises 3D building models, raw GPS measurements, and machine learning. This wrong-side-of-the-street position error is caused by reflected GPS signals in cities, and we embarked on an ambitious project to help solve this great problem in GPS. For instance, when users request a rideshare vehicle in a city, apps cannot easily locate them because of the GPS errors. This is particularly critical for the most used location apps, such as rideshare and navigation. However, we’ve heard from many of you that the biggest location issue is inaccuracy in dense urban areas, such as wrong-side-of-the-street and even wrong-city-block errors. That’s why we aim to provide the best location experience with our APIs like the Fused Location Provider API (FLP). Posted by Frank van Diggelen, Principal Engineer and Jennifer Wang, Product ManagerĪt Android, we want to make it as easy as possible for developers to create the most helpful apps for their users.
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