{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950480,-0.310785,0.000000,0.000000,0.114343,-0.349697,0.929859,0.000000,-0.288722,0.883005,0.370057,0.000000,-1842351.991840,5634508.775711,2345549.732193,1],    "boundingVolume": {    "region": [1.886741,0.379031,1.886889,0.379110,0.000000,13.397977]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/20/15_4146.b3dm"}}}