{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950051,-0.312093,0.000000,0.000000,0.174275,-0.530515,0.829567,0.000000,-0.258358,0.786475,0.560988,0.000000,-1649583.491220,5021537.780136,3557857.963464,1],    "boundingVolume": {    "region": [1.888110,0.595514,1.888274,0.595645,0.000000,8.563819]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15_1354220.b3dm"}}}