# Merging 3D Tilesets

**URL:** <https://community.cesium.com/t/merging-3d-tilesets/14288>\
**Category:** General\
**Created:** [July 2, 2021, 3:08pm UTC](https://community.cesium.com/t/merging-3d-tilesets/14288 "2021-07-02T15:08:15Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![petergerten](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/petergerten/32/4930_2.png) [@petergerten](https://community.cesium.com/u/petergerten)\
**Post date:** [July 2, 2021, 3:08pm UTC](https://community.cesium.com/t/merging-3d-tilesets/14288/1 "2021-07-02T15:08:15Z")

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I have roughly ~1000 large 3D tilesets (also available as single .obj files).  
I plan to host them myself. Is there any way to “merge” them into one 3D tileset?  
Using 1000 tileset URLs is not going to be very performant.  
But I could not find any pointers yet how to solve this problem.

Data Source: [Planning Department Hong Kong 3D Photo-realistic Model 規劃署 香港三維實景模型 规划署 香港三维实景模型](https://www.pland.gov.hk/pland_en/info_serv/3D_models/download.htm)

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**Author:** ![sam.rothstein](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/sam.rothstein/32/6584_2.png) [@sam.rothstein](https://community.cesium.com/u/sam.rothstein)\
**Post date:** [July 2, 2021, 6:30pm UTC](https://community.cesium.com/t/merging-3d-tilesets/14288/2 "2021-07-02T18:30:16Z")

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@petergerten

Great question! It seems like there is at least one [other post](https://community.cesium.com/t/how-to-merge-multiple-tilesets-into-a-single-one/13996) that asks a similar question. In general, you should upload all of your data to Cesium ion, yielding a single URL that will load all of your data. The data you provided is in a format accepted by Cesium ion so this is certainly feasible. Sadly, I do not know of an elegant way to “merge” 1000 large 3D tilesets if you are hosting them yourself. I will check in with the Cesium team and let you know if anything comes up.

-Sam

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**Author:** ![petergerten](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/petergerten/32/4930_2.png) [@petergerten](https://community.cesium.com/u/petergerten)\
**Post date:** [July 9, 2021, 5:41am UTC](https://community.cesium.com/t/merging-3d-tilesets/14288/3 "2021-07-09T05:41:54Z")

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The thing is: hosting a few terrabyte for single user locally is easy and cheap. While I could upload it to Ion, it would be VERY expensive. The amount of data would even require custom tier pricing.