{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950749,-0.309960,0.000000,0.000000,0.173033,-0.530749,0.829678,0.000000,-0.256627,0.787159,0.560824,0.000000,-1638528.458674,5025899.788956,3556814.096102,1],    "boundingVolume": {    "region": [1.885890,0.595324,1.886006,0.595438,0.000000,8.776296]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/9_1448641.b3dm"}}}