{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950365,-0.311138,0.000000,0.000000,0.173654,-0.530422,0.829757,0.000000,-0.257627,0.786916,0.560706,0.000000,-1644911.461454,5024347.655207,3556065.734867,1],    "boundingVolume": {    "region": [1.887137,0.595180,1.887236,0.595297,0.000000,8.778256]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/8_1454215.b3dm"}}}