Generate a terrain

Click on terrain container and click on "Export Terrain Data" Panel.

Click on "Select Location" button, set where to save unitypackage.

Enable what to export.

Click on "Export" Button.

New Folder will appear after exporting, "Exported GIS Terrains" which includes terrain prefab with its dependencies.

Import the saved Unitypackage into a new project.

Drag and drop the terrain prefab

If you want to keep using coordinates and some basic scripts after exporting terrain without needing to import the entire project, you just need to import "Assets\GIS Tech\GIS Terrain Loader\Resources\Libs\SimplifiedGISTerrainLoader.unitypackage"  into your empty project. 

In this case be sure that export package option = default and export scripts = disable.