How to use Draco Compression converting a las point cloud to Cesium 3d Tiles

CesiumJS
1

Does anyone have any knowledge on the process of converteing to cesium 3d tiles and compressing using
Draco?

Any help is much appreciated.

Thank you.

Google Draco https://github.com/google/draco

Cesium article Compressing Massive Point Clouds with 3D Tiles and Draco – Cesium

2

Hi @cirrusdevs,

Thank you for the question! Can you please share some more information on your use case?

A lot of CesiumJS developers upload their data to Cesium ion. From here, they stream their data as 3D Tiles into CesiumJS at runtime.

Looking forward to learning more.

Best,
Sam

3

Thanks for replying Sam.

I have successfully processed a las point cloud using the following stages: las → entwine ept dataset → 3d tile .pnts dataset. I want to improve performance, hence another post I made Explanation on Point Cloud Visual Settings.

How would I incorporate draco in that process?

Does cesiumjs support draco encoding/decoding or is it just Cesium ion.
I want to be able to store the processed file locally for use in a custom cesium viewer.

Does Cesium ion have a download option for the processed file?

My preference is not to use Cesium ion as I want to self host and use custom tools.

Many thanks.

4

Hi @cirrusdevs,

When uploading data to Cesium ion, and tiling the data as 3D Tiles, you will get the option to enable Draco compression. Cesium ion currently does not have a download option for files that are uploaded. Cesium does offer on-premise tools for more specific use cases where users need to tile their data on a local server.

Best,
Sam

5

Unfortunately there is no .pnts draco compression tool that I know of.

There is a standalone tool to convert gltf to Draco compressed gltf, but not for point.

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