{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.858299,-0.513149,0.000000,0.000000,0.262709,-0.439410,0.859013,0.000000,-0.440023,0.735987,0.514493,0.000000,-2809015.224231,4698389.679023,3262432.814302,1],    "boundingVolume": {    "region": [2.109564,0.540354,2.109729,0.540479,0.000000,50.043633]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/8/7_254378.b3dm"}}}