{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.893017,-0.450023,0.000000,0.000000,0.290390,-0.576245,0.763947,0.000000,-0.342830,0.680305,0.647806,0.000000,-2189695.117306,4345187.504377,4109911.566197,1],    "boundingVolume": {    "region": [2.037535,0.704666,2.037640,0.704735,0.000000,30.823479]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/0/15_1920861.b3dm"}}}