{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950421,-0.310966,0.000000,0.000000,0.114426,-0.349727,0.929837,0.000000,-0.288883,0.882929,0.370112,0.000000,-1843382.877515,5634024.752850,2345900.067320,1],    "boundingVolume": {    "region": [1.886931,0.379091,1.887080,0.379169,0.000000,13.550345]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/16_4467.b3dm"}}}