{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950353,-0.311175,0.000000,0.000000,0.173873,-0.531022,0.829327,0.000000,-0.257522,0.786495,0.561345,0.000000,-1644248.595402,5021671.363460,3560122.930438,1],    "boundingVolume": {    "region": [1.887175,0.595963,1.887275,0.596057,0.000000,8.808950]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/15.b3dm"}}}