{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.858368,-0.513034,0.000000,0.000000,0.262711,-0.439547,0.858942,0.000000,-0.439887,0.735985,0.514612,0.000000,-2808151.411366,4698379.220487,3263186.354600,1],    "boundingVolume": {    "region": [2.109430,0.540492,2.109594,0.540618,0.000000,5.455433]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/7/8_268493.b3dm"}}}