{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.858391,-0.512996,0.000000,0.000000,0.262452,-0.439159,0.859220,0.000000,-0.439998,0.736244,0.514146,0.000000,-2808854.358305,4700027.808947,3260225.878427,1],    "boundingVolume": {    "region": [2.109386,0.539949,2.109550,0.540074,0.000000,101.578900]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/7/4_220010.b3dm"}}}