{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949538,-0.313652,0.000000,0.000000,0.175137,-0.530203,0.829585,0.000000,-0.259654,0.786067,0.560962,0.000000,-1657857.928219,5018933.223732,3557688.180205,1],    "boundingVolume": {    "region": [1.889752,0.595414,1.889914,0.595680,0.000000,8.792672]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15_1366966.b3dm"}}}