{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949099,-0.314978,0.000000,0.000000,0.116129,-0.349923,0.929553,0.000000,-0.292520,0.881428,0.370834,0.000000,-1866591.084201,5624455.216326,2350476.308121,1],    "boundingVolume": {    "region": [1.891176,0.379849,1.891284,0.379964,0.000000,68.927894]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/16/21_480.b3dm"}}}