{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950444,-0.310896,0.000000,0.000000,0.114390,-0.349702,0.929851,0.000000,-0.288823,0.882964,0.370077,0.000000,-1842995.476057,5634245.970667,2345674.661800,1],    "boundingVolume": {    "region": [1.886857,0.379052,1.887006,0.379131,0.000000,28.799661]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_4239.b3dm"}}}