{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950700,-0.310112,0.000000,0.000000,0.173062,-0.530551,0.829798,0.000000,-0.256790,0.787233,0.560645,0.000000,-1639568.413569,5026372.511208,3555674.358179,1],    "boundingVolume": {    "region": [1.886049,0.595107,1.886165,0.595222,0.000000,8.803257]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/7/7_1449848.b3dm"}}}