In this example, for demonstration purposes, two LiDAR files have already been imported.
The parent site was created in Large Range mode and is not yet geolocated, while the terrain is geolocated.
For this tutorial, two additional LiDAR files will be imported from the data base.

1. Data Source

LiDAR data can be freely downloaded from the “LIDAR Géoservices” website, which provides high-definition terrain data (LiDAR HD) for mainland France.

All terrains available on this platform are georeferenced using the Lambert 93 coordinate reference system (CRS).

2. Importing a New LiDAR File

• Create a new Terrain (Large Range).
• Edit the 3DShape and enable the Terrain Preparation application.
• Import the LiDAR files (in meters).
• Select the “With Geolocation” option.
• Choose the appropriate Source CRS for the LiDAR file and the Target CRS for the working environment.

Note: Select the same CRS for the Part to correctly align the 3D reference frame with the target environment.

3. Geolocating the Root Site

• Enable geolocation for the Root site.
• Once activated, all sites will be properly geolocated.
• Afterward, update the Assembly to ensure proper alignment and consistency.

4. Using OSM Files

If an OSM (OpenStreetMap) file is used, ensure that the Target CRS matches the CRS of the environment or assembly in which it is hosted.