{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950428,-0.310944,0.000000,0.000000,0.173531,-0.530413,0.829789,0.000000,-0.257476,0.786999,0.560659,0.000000,-1643949.929036,5024876.057053,3555765.769364,1],    "boundingVolume": {    "region": [1.886933,0.595123,1.887032,0.595240,0.000000,8.796614]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/3/7_1449926.b3dm"}}}