{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949527,-0.313684,0.000000,0.000000,0.175164,-0.530226,0.829565,0.000000,-0.259674,0.786039,0.560992,0.000000,-1657984.817419,5018754.648973,3557879.668810,1],    "boundingVolume": {    "region": [1.889787,0.595529,1.889946,0.595638,0.000000,8.792672]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15.b3dm"}}}