{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.948807,-0.315856,0.000000,0.000000,0.176368,-0.529797,0.829584,0.000000,-0.261478,0.785461,0.560964,0.000000,-1669502.479004,5015059.905635,3557704.824649,1],    "boundingVolume": {    "region": [1.892107,0.595439,1.892203,0.595662,0.000000,8.778929]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/15_1181617.b3dm"}}}