{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949083,-0.315026,0.000000,0.000000,0.176181,-0.530783,0.828993,0.000000,-0.260604,0.785125,0.561840,0.000000,-1663928.232498,5012932.544320,3563272.504877,1],    "boundingVolume": {    "region": [1.891230,0.596598,1.891331,0.596620,0.000000,10.428684]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/9_1420085.b3dm"}}}