{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950431,-0.310936,0.000000,0.000000,0.173526,-0.530413,0.829790,0.000000,-0.257470,0.787002,0.560658,0.000000,-1643910.348980,5024894.779453,3555757.665092,1],    "boundingVolume": {    "region": [1.886925,0.595122,1.887024,0.595239,0.000000,8.796614]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/3/7_1449919.b3dm"}}}