Anybody can help me to use external tileset based on the specifications.
External tilesets
I have three Scenes and i am trying to create a parent tileset
tileset1.json
tileset2.json
tileset3.json
What is the structure of tile parent tileset?
{
“asset”: {
“version”: “1.0”
},
“geometricError”: 100,
“root”: {
“boundingVolume”: {
“sphere”: [
1054.7612846155,
350.0,
100.0,
800.0
]
},
“content”: {
“uri”: “tileset1.json”
}
}
}
Welcome to the community! 
From what I can tell, you have three tilesets. You now wish to create a fourth tileset as a parent to the remaining tileset. Is this correct?
What part of the implementation are you on so far? Some details on the contents of the tilesets as well as the way you wish to combine them would also be helpful. As always, sharing a sandcastle demo of what you have so far would be great!
Let me know if you have any other questions or concerns. I am looking forward to learning more about your project.
-Sam
Hi and thank you for the quick response.
You now wish to create a fourth tileset as a parent to the remaining tileset. Is this correct?
Correct!
the tilesets were produced using context capture. I am using cesium js library to view them in browser. All three of them are fully working independently. I am trying to “merge” - create a parent tileset for three models.
I believe cesiumjs can handle better the models using a parent tileset than creating multiple independent Cesium3DTileset as data content is loaded based on the view instead of loading everything at once. Also its easier to manipulate a single Cesium3DTileset than multiple.
The main goal of the project is to create a cesium world with all my models (more than three) and cesium will load the content when i zoom to that specific area.
What i cannot figure out is what will the structure of the json/parent tileset will be, as based on the specifications for external tileset i can not create childrens.
Sandcastle example