Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download GO Map – 3D Map for AR Gaming Free.
GO Map – 3D Map for AR Gaming v3.4.1
GO Map – 3D Map for AR Gaming v3.2
GO Map is a dynamic map SDK for making location based games with unity 3D.
Highly customizable with the classic Unity inspector interface GO Map is the easiest map plugin around.
Choose among various examples to fully understand GO Map capabilities and build every demo scene on your smartphone using real GPS position in few clicks
GO Map now includes GO Terrain! Enjoy maps with elevation, satellite images and lots of more features! …
GoMap support vector tiles data in the protobuffer format using several map APIs:
• Open Street Map
GO Map is a real-time 3D map renderer for AR Gaming purposes.
It’s really easy to use and customize, just build it on your device and go outside to try!
Or use it inside editor, it works great too =)
Every element of the map is customizable inside the editor without touching a single line of code.
GoMap will save you a lot of time if you want to make any GPS/Map related application inside Unity 3D.
GoMap will render a full 3D map inside your scene without the use of any raster map image, everything you’ll get is 100% generated by unity code.
Think GoMap more of a 3D real world generator then a slippy map, even if they share most of the basic map functionalities.
GoMap uses vector map data to procedurally generate meshes in the scene. Vector map tiles contains all the information to render a map without the use of images. Vector tiles are way more efficient than raster (images) in terms of size, internet traffic, and resolution.
Starting with version 2.3 GoMap support protobuffer map files instead the simple json format.
Protobuffer is a binary format that’s significantly lighter and faster than json, and it’s a standard among various map providers.
GoMap will decompress the downloaded data and parse it in order to build map features.
Since it’s beginning GoMap as used the mapzen json data, and honestly I think it’s still the best vector layer provider. From now on I suggest you to use mapzen data in the protobuffer format instead of json.