{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950444,-0.310897,0.000000,0.000000,0.114398,-0.349727,0.929841,0.000000,-0.288820,0.882953,0.370103,0.000000,-1842980.860288,5634179.994372,2345843.473850,1],    "boundingVolume": {    "region": [1.886859,0.379081,1.887007,0.379160,0.000000,28.799661]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_4430.b3dm"}}}