Is it possible for Geoserver to give set of 3D models like .dae, .obj, etc, in a KML format. I would store the 3dmodels in geoserver, only link will be generated for front-end developers.
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The KMZ format is a ZIP-compressed version of KML, that can contain *.dae (which is a COLLADA 3D model) along with the model's texturemaps.
I can't speak to Geoserver's capabilities, perhaps a Geoserver expert will chime in here on how to serve custom files like this.
But since you tagged this question with Cesium, I should note that a Cesium client isn't going to ingest the COLLADA format natively, as COLLADA and indeed KMZ are not good delivery formats to target web browsers (at least not without the now-retired Google Earth plugin).
Cesium natively loads models from the glTF format, published by Khronos, the makers of COLLADA. As such there are some COLLADA to glTF converters available. These glTF models then can be embedded in or referenced from CZML, which is Cesium's preferred delivery format.
emackey
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