{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950422,-0.310963,0.000000,0.000000,0.114348,-0.349491,0.929936,0.000000,-0.288912,0.883025,0.369862,0.000000,-1843561.970406,5634632.083106,2344310.828220,1],    "boundingVolume": {    "region": [1.886928,0.378821,1.887077,0.378900,0.000000,6.224204]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/12_8631.b3dm"}}}