{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950935,-0.309390,0.000000,0.000000,0.113155,-0.347791,0.930719,0.000000,-0.287695,0.884254,0.367868,0.000000,-1835789.734842,5642446.996114,2331664.467579,1],    "boundingVolume": {    "region": [1.885347,0.376715,1.885348,0.376716,0.000000,1.178166]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15.b3dm"}}}