{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950672,-0.310197,0.000000,0.000000,0.173361,-0.531306,0.829252,0.000000,-0.256690,0.786687,0.561456,0.000000,-1638935.990311,5022901.491654,3560832.400168,1],    "boundingVolume": {    "region": [1.886149,0.596110,1.886245,0.596180,0.000000,8.760521]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/2/1.b3dm"}}}