{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950426,-0.310951,0.000000,0.000000,0.114419,-0.349724,0.929839,0.000000,-0.288870,0.882936,0.370107,0.000000,-1843298.420304,5634067.389936,2345864.272692,1],    "boundingVolume": {    "region": [1.886915,0.379085,1.887064,0.379163,0.000000,13.550345]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/16_4437.b3dm"}}}