{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949546,-0.313627,0.000000,0.000000,0.175123,-0.530207,0.829586,0.000000,-0.259633,0.786074,0.560961,0.000000,-1657723.935513,5018979.036276,3557686.002654,1],    "boundingVolume": {    "region": [1.889725,0.595414,1.889887,0.595679,0.000000,8.792672]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15_1366974.b3dm"}}}