{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950748,-0.309965,0.000000,0.000000,0.173248,-0.531400,0.829216,0.000000,-0.256487,0.786715,0.561510,0.000000,-1637637.400345,5023082.446793,3561172.295809,1],    "boundingVolume": {    "region": [1.885880,0.596100,1.886026,0.596319,0.000000,8.760186]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/14_1423312.b3dm"}}}