GLTF Model Appears Floating In Sky


I have a 3D point cloud that I converted using the COLLADA to GLTF converter. I’m able to load the model into Cessium; however, the model appears as kind of puzzle piece, well-above the Earth’s surface (see screen shot). The code I’m using to generate the model is below. As a note, I’ve also tried used the syntax Cartesian3.fromDegrees(-81.6557,30.3322,0) to specify the position- no change.


function createModel(url) {

    var entity = viewer.entities.add({
        position : Cartesian3.fromDegrees(-81.6557,30.3322),
        model : {
            uri : url
    viewer.trackedEntity = entity;