{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950892,-0.309524,0.000000,0.000000,0.173045,-0.531615,0.829120,0.000000,-0.256092,0.786743,0.561652,0.000000,-1635114.236246,5023258.681992,3562076.903067,1],    "boundingVolume": {    "region": [1.885415,0.596272,1.885561,0.596491,0.000000,8.806427]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/12/15_1385830.b3dm"}}}