{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949084,-0.315023,0.000000,0.000000,0.116164,-0.349971,0.929530,0.000000,-0.292555,0.881392,0.370890,0.000000,-1866814.955205,5624229.183286,2350836.919529,1],    "boundingVolume": {    "region": [1.891224,0.379910,1.891332,0.380025,0.000000,70.386220]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/16/21_1268.b3dm"}}}