{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950761,-0.309927,0.000000,0.000000,0.172967,-0.530610,0.829780,0.000000,-0.256631,0.787266,0.560672,0.000000,-1638552.075640,5026580.804919,3555847.236165,1],    "boundingVolume": {    "region": [1.885854,0.595140,1.885970,0.595254,0.000000,8.761658]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/7_1448445.b3dm"}}}