Real terrain maker is an easy tool for creating terrain with the real geographic data.
Specifies the geographic coordinates, and make a terrain of anywhere on the earth in a few clicks.
This plug-in runs depending on the Google/Bing/mapbox map service, which requires Elevations API and Static map API keys.
RTM can generate objects with HDRP/LWRP materials as default.
A Default Shader setting panel shows at the bottom of RTM setting window in Unity 2018.1(and newer).
Features:

◆Real Elevation data:

Using the elevation data of Google map, Bing map, and Mapbox, over 30 meters in most of the Earth areas. When you meet problems such as lack of data in a certain area, try another data source if one is not so satisfactory.

◆Easy Setting:

To make a terrain faster or in high quality, simulate the real world or make an extravagant land. All setting can be made in a few clicks. Your keys and settings will be saved, no need to remember the location you generated last night.

◆Save in Many Types:

The data downloaded can be saved in mesh, terrain, and prefab. The material is created automaticity. You can share the terrain you made with others without a hitch. With a combine and save tool, You can combine and save the generated mesh to prefab and unity terrain at any time.

◆Basic Materials for Terrain Provided:

Several materials such as contour, grid, gradient and multiple texture height shader. It's possible to add some snow at the top of mountains and lava in the valley.

◆ Height Map:

A heightmap file will be saved after the terrain generated(optional). You can generate a new terrain with the premade height map at any time.

◆Style Setting:

You can generate a terrain of low-poly style and set a default material before generating them. You can also set the default layer for the use of Infinite Map.

◆ Map Style:

Besides satellite, many other styles of terrain texture are supported. It is convenient for making a 3D map. Image saved in a folder for each time the generate starts(optional).

◆ Preset Template:

Include some common options for fast data preview or high details terrain creating.

◆ Random Map:

One selectable option to generate a random map is provided. It can be used to save time when doing tests or just make an infinite random terrain in a game.

◆Run Time Infinite Map:

Download the map texture and elevation data automaticity while running the game. The adjacent tiles will be generated while the character moving.

◆ Diagnosis Tool:

Check the network condition and API key state. If you are not sure about why RTM work incorrectly, try the Diagnosis tool to find out.

◆ Smooth Style:

Make a smooth terrain with a smaller sample.

Changelog

v2.4

SRP supported.

v2.3

Datasource of Google fixed.
Can generate square/auto/custom size mesh.
Check not-save-files-to-local to save time while running a infinite map.
*Two calculation methods of geographical region in Center Mode.

v2.2

Datasource of mapbox supported.
Bugs fixed.
Interface upgrade.

v2.1.1

Improve the Smooth terrain for infinite map.
More parameters to generate a random map.
Some bugs of saving mesh as unity terrain were fixed.

v2.1:

Smooth terrain with small sample.
Diagnosis tool and height map importer.

v2.0:

upgrade the autozoom function ,and support bigger texture download.
Change the sampling method of geographic coordinates while generating terrain.

To free users of map API, the number of elevation samples and limit the times of requirements in one day. Try to work within this limitation or upgrade the API key.
Google has updated its rule of API Usage and Billing, please check your Google account for more information.