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How to create a i3s LOD Tileset from gltf model.

WaqasBakht

Hello,

I want to test the I3s tileset using some of our large 3d geo datasets. I am new to Arc and have been struggling to figure out how to create a tileset.

I have used the Cesium tiling platform, and this accepts gltf files and can create a 3D Tileset with LOD's using that gltf data. But I need to do the same with Arc and I3s.

If anyone can provide some guidance that would be appreciated!

Thanks,

Waqas

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Tim_McGinnes

I would suggest you look at ArcGIS City Engine. It has support for Importing GLTF and Exporting SLPK. Also refer to the Model Export Application Notes, which talks about large models and LODs.

You could ask for a trial version from Esri to see if it will work - it may also be good to contact your Esri distributor directly to ask them if what you want to do is feasible or not.

WaqasBakht

Thanks for your response!

Would this work for very large models, say on the scale of Canadian Provinces?

Thanks Again!

Tim_McGinnes

The answer of course is ... maybe! I don't use City Engine, I just remember reading something about GLTF support somewhere. Might be worthwhile posting a question in the ArcGIS City Engine community.

It would help if you could describe your model in a bit more detail, maybe with some screenshots (if it is not confidential). There is a big difference between a full city (or province) wide integrated mesh model vs a model made up of DEM + imagery + BIM + multipatches for example. There may be good reasons to take your original source datasets and bring them into the esri environment via a variety of methods to get the best results.

WaqasBakht

Hey Tim,

Thanks again for your response!

So I have these large volumetric grids (originally in a vtk format), these models are being triangulated into meshes and converted into gltf. The example here is a voxel grid representing Alberta. This grid is also projected from espg:3978 to WGS84 coordinates during the conversion process. Screenshot 2021-04-18 140412.png

Cesium has a pipeline where they take in a gltf model and can create LOD's and I want to recreate the same thing using Arc's i3s format. I've been trying to use ArcGis pro for this originally but it doesn't seem that simple!

Thanks again for your advice!

- Waqas

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