# Cesium Sub Scene
**URL:** https://community.cesium.com/t/cesium-sub-scene/23871
**Category:** Cesium for Unity
**Created:** [May 8, 2023, 10:52am UTC](https://community.cesium.com/t/cesium-sub-scene/23871 "2023-05-08T10:52:58Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@jh007](https://community.cesium.com/u/jh007)
#### Post date: [May 8, 2023, 10:52am UTC](https://community.cesium.com/t/cesium-sub-scene/23871/1 "2023-05-08T10:52:58Z")
About the value of ActivationRadius in Cesium Sub Scene, what is its maximum value in general
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### Author:  [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)
#### Post date: [May 8, 2023, 11:12am UTC](https://community.cesium.com/t/cesium-sub-scene/23871/2 "2023-05-08T11:12:17Z")
There shouldn’t be any particular maximum value. But only the single closest sub-scene will be activated at any given time.
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### Author:  [@jh007](https://community.cesium.com/u/jh007)
#### Post date: [May 9, 2023, 3:37am UTC](https://community.cesium.com/t/cesium-sub-scene/23871/3 "2023-05-09T03:37:22Z")
I want to set only one subscene, and set its ActivationRadius value to be large enough to cover the earth. Is that OK
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### Author:  [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)
#### Post date: [May 9, 2023, 4:09am UTC](https://community.cesium.com/t/cesium-sub-scene/23871/4 "2023-05-09T04:09:43Z")
I don’t think the subscene will be doing much for you in that scenario. But it shouldn’t cause any problems either. Can I ask why you want to do that?
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### Author:  [@jh007](https://community.cesium.com/u/jh007)
#### Post date: [May 9, 2023, 6:02am UTC](https://community.cesium.com/t/cesium-sub-scene/23871/5 "2023-05-09T06:02:30Z")
I want to generate many objects according to the latitude and longitude in the scene through the code. The latitude and longitude of these objects involve a large range, if I have multiple sub-scenes, I don’t know which sub-scene is the parent object of these code generated objects
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### Author:  [@jh007](https://community.cesium.com/u/jh007)
#### Post date: [May 9, 2023, 6:06am UTC](https://community.cesium.com/t/cesium-sub-scene/23871/6 "2023-05-09T06:06:20Z")
I have a question about object generation in code. How can I instantiate an object in the scene from the latitude and longitude coordinates, and ask that this object is on the ground in Cesium map, as if height 0 does not mean that it is on the ground
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### Author:  [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)
#### Post date: [May 9, 2023, 6:21am UTC](https://community.cesium.com/t/cesium-sub-scene/23871/7 "2023-05-09T06:21:11Z")
> [@jh007](#):
>
> I want to generate many objects according to the latitude and longitude in the scene through the code. The latitude and longitude of these objects involve a large range, if I have multiple sub-scenes, I don’t know which sub-scene is the parent object of these code generated objects
Ok, sure, but you can just avoid using _any_ subscenes.
> How can I instantiate an object in the scene from the latitude and longitude coordinates…
I answered this in your other thread.