{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950455,-0.310863,0.000000,0.000000,0.114378,-0.349706,0.929851,0.000000,-0.288792,0.882974,0.370077,0.000000,-1842801.154381,5634309.889823,2345673.805051,1],    "boundingVolume": {    "region": [1.886823,0.379052,1.886972,0.379131,0.000000,28.799661]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_4252.b3dm"}}}