Example 3dtile point cloud JSON feature table

CesiumJS
1

I am new to the 3dtile world, I am trying to generate a JSON feature table to accompany some 3dtiles.

I found the feature table schema: https://github.com/AnalyticalGraphicsInc/3d-tiles/blob/3133ce68ffc6e239936fcb1873ddb6cd9ff25d8c/specification/schema/pnts.featureTable.schema.json

and the a feature table example: https://github.com/AnalyticalGraphicsInc/3d-tiles/blob/master/examples/pnts.featureTable.json

But I was wondering if someone could share with me a more detailed example?

Cheers, Ben

2

Hey Ben,

The only other source of sample 3D Tilesets I know of is in this repo:

Is there something specific you’re having trouble with? You might already be aware of this but if you’re just trying to convert your data to 3D Tiles Cesium ion (https://cesium.com/ion/) can let you do that just by dragging it into your browser.

3

Thanks for the reply, I am still trying to understand how the 3d tiles work, specifically the styling. The documentation has an example like this:

tileset.style = new Cesium.Cesium3DTileStyle({
    color : 'vec4(\{Temperature\}\)',     pointSize : '{Temperature} * 2.0'
});

Is "Temperature" a property that has been added to the .pnts feature table?

4

Yes! This is definitely on us for not documenting this better. Cesium ion’s 3D Tiling pipeline extracts a few properties from the LAS/LAZ files, including Temperature and Classification. There was some more discussion on that in this thread:

https://groups.google.com/d/msg/cesium-dev/hjSPlQZjdc4/8LBFHkOQBgAJ