{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950448,-0.310882,0.000000,0.000000,0.114380,-0.349689,0.929858,0.000000,-0.288812,0.882974,0.370061,0.000000,-1842927.793897,5634310.653384,2345573.153570,1],    "boundingVolume": {    "region": [1.886843,0.379035,1.886992,0.379114,0.000000,28.799661]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_4167.b3dm"}}}