{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950452,-0.310870,0.000000,0.000000,0.114387,-0.349726,0.929843,0.000000,-0.288796,0.882963,0.370099,0.000000,-1842824.891995,5634243.288073,2345814.182453,1],    "boundingVolume": {    "region": [1.886830,0.379076,1.886979,0.379155,0.000000,28.799661]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_4400.b3dm"}}}