{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950431,-0.310936,0.000000,0.000000,0.114413,-0.349722,0.929841,0.000000,-0.288857,0.882941,0.370103,0.000000,-1843213.102692,5634104.614871,2345842.056862,1],    "boundingVolume": {    "region": [1.886900,0.379081,1.887048,0.379159,0.000000,28.799661]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_4431.b3dm"}}}