{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950445,-0.310892,0.000000,0.000000,0.114381,-0.349681,0.929860,0.000000,-0.288822,0.882973,0.370054,0.000000,-1842991.661715,5634307.134062,2345531.704212,1],    "boundingVolume": {    "region": [1.886854,0.379028,1.887002,0.379107,0.000000,16.963460]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_4135.b3dm"}}}