{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950336,-0.311227,0.000000,0.000000,0.173894,-0.530989,0.829344,0.000000,-0.257571,0.786497,0.561320,0.000000,-1644558.647853,5021683.573193,3559963.566892,1],    "boundingVolume": {    "region": [1.887272,0.595970,1.887288,0.595989,0.000000,8.682140]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/7/15.b3dm"}}}