{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.948816,-0.315831,0.000000,0.000000,0.176378,-0.529874,0.829533,0.000000,-0.261441,0.785419,0.561040,0.000000,-1669267.954678,5014795.809748,3558183.878278,1],    "boundingVolume": {    "region": [1.892081,0.595530,1.892177,0.595753,0.000000,8.778929]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/15_1146827.b3dm"}}}