{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.952576,-0.304301,0.000000,0.000000,0.113403,-0.354993,0.927965,0.000000,-0.282116,0.883129,0.374826,0.000000,-1800219.267102,5635365.511209,2375806.586626,1],    "boundingVolume": {    "region": [1.879927,0.384145,1.880074,0.384274,0.000000,7.953394]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/21_39403.b3dm"}}}