{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949111,-0.314942,0.000000,0.000000,0.116121,-0.349943,0.929546,0.000000,-0.292484,0.881432,0.370850,0.000000,-1866365.406888,5624485.989876,2350581.167824,1],    "boundingVolume": {    "region": [1.891138,0.379867,1.891246,0.379982,0.000000,72.367680]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/21_727.b3dm"}}}