{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950696,-0.310123,0.000000,0.000000,0.173069,-0.530552,0.829796,0.000000,-0.256798,0.787228,0.560649,0.000000,-1639621.887107,5026337.584244,3555698.908166,1],    "boundingVolume": {    "region": [1.886061,0.595112,1.886177,0.595226,0.000000,8.766509]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/8/7_1449863.b3dm"}}}