{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.858448,-0.512901,0.000000,0.000000,0.262622,-0.439553,0.858966,0.000000,-0.439786,0.736073,0.514572,0.000000,-2807502.718543,4698943.376212,3262933.889941,1],    "boundingVolume": {    "region": [2.109275,0.540446,2.109440,0.540571,0.000000,44.774900]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/8_265474.b3dm"}}}