{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950431,-0.310934,0.000000,0.000000,0.114421,-0.349750,0.929829,0.000000,-0.288852,0.882931,0.370132,0.000000,-1843180.295843,5634038.775950,2346024.723023,1],    "boundingVolume": {    "region": [1.886898,0.379112,1.887047,0.379190,0.000000,19.337587]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/16_4543.b3dm"}}}