{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950052,-0.312093,0.000000,0.000000,0.174273,-0.530510,0.829571,0.000000,-0.258359,0.786479,0.560982,0.000000,-1649586.844737,5021564.000478,3557819.659246,1],    "boundingVolume": {    "region": [1.888109,0.595506,1.888273,0.595638,0.000000,8.648813]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15_1456030.b3dm"}}}