{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949108,-0.314950,0.000000,0.000000,0.116110,-0.349900,0.929564,0.000000,-0.292497,0.881447,0.370806,0.000000,-1866447.653721,5624577.036453,2350299.882433,1],    "boundingVolume": {    "region": [1.891146,0.379819,1.891255,0.379934,0.000000,72.367680]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/21_77454.b3dm"}}}