{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950363,-0.311145,0.000000,0.000000,0.173846,-0.530996,0.829349,0.000000,-0.257505,0.786524,0.561312,0.000000,-1644134.473620,5021857.183314,3559914.921786,1],    "boundingVolume": {    "region": [1.887144,0.595912,1.887243,0.596029,0.000000,8.806958]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/15_1430261.b3dm"}}}