{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950700,-0.310112,0.000000,0.000000,0.173345,-0.531418,0.829184,0.000000,-0.256598,0.786645,0.561557,0.000000,-1638349.209402,5022634.782695,3561474.253111,1],    "boundingVolume": {    "region": [1.886058,0.596217,1.886156,0.596316,0.000000,8.773119]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/1/2_1427560.b3dm"}}}