{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.948817,-0.315825,0.000000,0.000000,0.176351,-0.529803,0.829584,0.000000,-0.261453,0.785469,0.560964,0.000000,-1669341.113711,5015115.285179,3557702.494311,1],    "boundingVolume": {    "region": [1.892075,0.595438,1.892171,0.595661,0.000000,8.778929]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/15_1181621.b3dm"}}}