{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.948818,-0.315823,0.000000,0.000000,0.176352,-0.529810,0.829579,0.000000,-0.261449,0.785465,0.560971,0.000000,-1669319.760485,5015088.870891,3557749.431740,1],    "boundingVolume": {    "region": [1.892072,0.595447,1.892168,0.595670,0.000000,8.778929]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/15_1181671.b3dm"}}}