{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.857693,-0.514162,0.000000,0.000000,0.263224,-0.439094,0.859016,0.000000,-0.440893,0.735470,0.514487,0.000000,-2814567.793209,4695091.932852,3262395.057860,1],    "boundingVolume": {    "region": [2.110744,0.540347,2.110908,0.540472,0.000000,25.256966]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/7_391952.b3dm"}}}